1
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Chernykh AV, Vashchenko BV, Shishkina SV, Volochnyuk DM, Grygorenko OO. 3-Substituted 6-Azabicyclo[3.1.1]heptanes: Nonclassical Piperidine Isosteres for Drug Discovery. J Org Chem 2024; 89:10440-10450. [PMID: 38989992 DOI: 10.1021/acs.joc.4c00326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/12/2024]
Abstract
Advanced analogs of piperidine and smaller homologues of tropane─3-substituted 6-azabicyclo[3.1.1]heptanes─were synthesized on a large scale using readily available bulk reagents. The key step of the approach involved the double alkylation reaction of malonate with cis-2,4-bis(mesyloxymethyl)azetidine-1-carboxylate, in turn easily prepared on up to 1 kg scale. After hydrolysis, N-Boc-6-azabicyclo[3.1.1]heptane-3,3-dicarboxylic acid was obtained (up to 400 g in a single run), which was used as a common intermediate for the preparation of all the title building blocks. In particular, Pb(OAc)4-mediated oxidative decarboxylation of this intermediate gave 2,6-methanopiperidone derivative (up to 400 g scale), while monodecarboxylation gave N-Boc-6-azabicyclo[3.1.1]heptane-3-carboxylic acids as an easily separatable mixture of cis and trans diastereomers (up to 100 g scale). Further functional group transformations gave diastereopure cis- and trans-N-Boc-monoprotected diamines and amino alcohols. Molecular structure analysis using exit vector parameters (EVP) revealed that cis isomers of 3-substituted 6-azabicyclo[3.1.1]heptanes are three-dimensional analogs of common 1,4-disubstituted piperidine chair conformer, whereas trans isomers can be considered as unusual "boat" piperidines.
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Affiliation(s)
- Anton V Chernykh
- Enamine Ltd. (www.enamine.net), Winston Churchill Street 78, Kyiv 02094, Ukraine
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv 01601, Ukraine
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Akademika Kuharya Street 5, Kyiv 02094, Ukraine
| | - Bohdan V Vashchenko
- Enamine Ltd. (www.enamine.net), Winston Churchill Street 78, Kyiv 02094, Ukraine
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Akademika Kuharya Street 5, Kyiv 02094, Ukraine
| | - Svitlana V Shishkina
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv 01601, Ukraine
- SSI "Institute for Single Crystals" of the NAS of Ukraine, Nauky Avenue 60, Kharkiv 61001, Ukraine
| | - Dmytro M Volochnyuk
- Enamine Ltd. (www.enamine.net), Winston Churchill Street 78, Kyiv 02094, Ukraine
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv 01601, Ukraine
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Akademika Kuharya Street 5, Kyiv 02094, Ukraine
| | - Oleksandr O Grygorenko
- Enamine Ltd. (www.enamine.net), Winston Churchill Street 78, Kyiv 02094, Ukraine
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Akademika Kuharya Street 5, Kyiv 02094, Ukraine
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2
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Intano J, Riel LP, Lim J, Robinson JR, Howell AR. 1,6-Dioxo-2-azaspiro[3.4]oct-2-enes and Related Spirocycles: Heterocycles from [3 + 2] Nitrile Oxide Cycloadditions with 2-Methyleneoxetanes, -Thietanes, and -Azetidines. J Org Chem 2023. [PMID: 38016079 DOI: 10.1021/acs.joc.3c01624] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
Isoxazolines and 4-membered heterocycles are significant structural motifs in numerous synthetic intermediates and natural products. [3 + 2] Cycloadditions between enol ethers and nitrile oxides have been well studied; however, nitrile oxide cycloadditions with 4-membered heterocycles to give spiroisoxazolines are unreported. Here, we showcase the regio- and diastereoselective [3 + 2] nitrile oxide cycloadditions of 2-methyleneoxetanes, -azetidines, and -thietanes to give an array of 1,6-dioxo-2-azaspiro[3.4]oct-2-enes and related spirocycles. 2D NMR experiments suggested that most of the observed diastereoselectivities were dictated by steric interactions; however, dipolarophiles with H bonding donors reversed the stereochemical outcome. X-ray crystallography confirmed the structural assignments.
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Affiliation(s)
- Jose Intano
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Louis P Riel
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Jacky Lim
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Jerome R Robinson
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Amy R Howell
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
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3
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Ma M, Kwon Y. Simultaneous Enhancement of the Mechanical Properties, Performance and Insensitivity of an Energetic Elastomeric Polyurethane Binder by Kinetically Grafting Reactive Spiranes. Polymers (Basel) 2023; 15:4564. [PMID: 38231984 PMCID: PMC10708326 DOI: 10.3390/polym15234564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 11/23/2023] [Accepted: 11/24/2023] [Indexed: 01/19/2024] Open
Abstract
A series of robust energetic polyurethane binders was developed by in situ grafting reactive spiranes to achieve the migration-resistant processing aid and compensate for the energy output. The reactive grafting spiranes (RGSs), bearing two highly ring-strained spiranes, were synthesized sequentially to provide a promising ring strain energy up to a maximum value of 290 kJ mol-1. The thermodynamic compatibility of the RGS with uncured glycidyl azido polymer (GAP) was studied quantitatively by analyzing the glass transition temperature of their blendings. The reactivity study of the catalyst-free click reaction with respect to spacer-dependent species was amplified by tracing the extent of the reaction and measuring the activation energy. The faster reactivity of propargyl species was evident from two experimental approaches, which were verified further by theoretical predictions. Interestingly, the energy gap difference in the frontier molecular orbitals agreed well with the difference in activation energy between the two types of spacer-dependent species. The mechanical and thermochemical enhancements of GAP-based polyurethane with RGS were basically gained from those highly ring-strained moieties.
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Affiliation(s)
- Mingyang Ma
- School of Chemistry and Materials Science, East China University of Technology, Nanchang 330013, China;
| | - Younghwan Kwon
- Department of Chemical Engineering, Daegu University, Gyeongsan 712-714, Republic of Korea
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4
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Eckart-Frank IK, Wilkerson-Hill SM. Palladium-Catalyzed Trans-Selective Synthesis of Spirocyclic Cyclobutanes Using α,α-Dialkylcrotyl- and Allylhydrazones. J Am Chem Soc 2023; 145:18591-18597. [PMID: 37552631 DOI: 10.1021/jacs.3c05699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
Herein, we demonstrate the use of E/Z mixtures of α,α-disubstituted crotylhydrazones to obtain spirocyclic vinylcyclobutanes in a diastereoselective fashion. We show 24 examples of a 1,1-insertion/4-exo-trig tandem process to produce these motifs. Additionally, spirocyclic alkylidene cyclobutanes can be obtained by using α,α-disubstituted allylated hydrazones (11 examples). In this study, we show that the aryl migrating group has a dramatic impact on the course of the reaction. Specifically, allylic C-H insertion products can be obtained in good yields using bromoenones as reaction partners. When Pd(0) is used with no aryl or alkenyl bromide, an intramolecular cyclopropanation reaction takes place to afford [2.1.0]-bicycles.
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Affiliation(s)
- Isaiah K Eckart-Frank
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Sidney M Wilkerson-Hill
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
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5
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Peng X, Lanter JC, Y-P Chen A, Brand MA, Wozniak MK, Hoekman S, Longin O, Regeling H, Zonneveld W, P L Bell R, Koenig G, Hurst RS, Blain JF, Burnett DA. Discovery of oxazoline enhancers of cellular progranulin release. Bioorg Med Chem Lett 2023; 80:129048. [PMID: 36368496 DOI: 10.1016/j.bmcl.2022.129048] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 10/28/2022] [Accepted: 11/03/2022] [Indexed: 11/09/2022]
Abstract
Phenotypic screening of an annotated small molecule library and initial SAR studies identified compound 2 as a robust enhancer of progranulin secretion. Detailed SAR development on conformationally restricted carbamate isosteres led to the identification of compound 60 with a 3-fold improvement in BV-2 potency and a 9-fold decrease in hERG inhibition over compound 2, substantially improving this important margin of safety relative to compound 2.
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Affiliation(s)
- Xiaowen Peng
- Arkuda Therapeutics, 200 Arsenal Yards Blvd Suite 220, Watertown, MA 02472, USA.
| | - James C Lanter
- Arkuda Therapeutics, 200 Arsenal Yards Blvd Suite 220, Watertown, MA 02472, USA
| | - Angela Y-P Chen
- Arkuda Therapeutics, 200 Arsenal Yards Blvd Suite 220, Watertown, MA 02472, USA
| | - Morgan A Brand
- Arkuda Therapeutics, 200 Arsenal Yards Blvd Suite 220, Watertown, MA 02472, USA
| | - Mary K Wozniak
- Arkuda Therapeutics, 200 Arsenal Yards Blvd Suite 220, Watertown, MA 02472, USA
| | - Steven Hoekman
- Symeres, Kerkenbos 1013, 6546 BB Nijmegen, the Netherlands
| | - Ondřej Longin
- Symeres, Kerkenbos 1013, 6546 BB Nijmegen, the Netherlands
| | | | - Wim Zonneveld
- Symeres, Kerkenbos 1013, 6546 BB Nijmegen, the Netherlands
| | - Roel P L Bell
- Symeres, Kerkenbos 1013, 6546 BB Nijmegen, the Netherlands
| | - Gerhard Koenig
- Arkuda Therapeutics, 200 Arsenal Yards Blvd Suite 220, Watertown, MA 02472, USA
| | - Raymond S Hurst
- Arkuda Therapeutics, 200 Arsenal Yards Blvd Suite 220, Watertown, MA 02472, USA
| | - Jean-François Blain
- Arkuda Therapeutics, 200 Arsenal Yards Blvd Suite 220, Watertown, MA 02472, USA
| | - Duane A Burnett
- Arkuda Therapeutics, 200 Arsenal Yards Blvd Suite 220, Watertown, MA 02472, USA
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6
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Kovalevsky RA, Kucherenko AS, Zlotin SG. Concise enantioselective synthesis of non-proteinogenic α-aminoacids via an organocatalytic Mannich-type reaction. Chem Commun (Camb) 2022; 58:12827-12830. [DOI: 10.1039/d2cc04909k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Scalable asymmetric synthesis of non-proteinogenic (S)-aminoacids and their derivatives based on an organocatalyzed Mannich-type reaction involving allomaltol applicable to subsequent RuIII-catalyzed oxidative cleavage has been developed.
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Affiliation(s)
- Ruslan A. Kovalevsky
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, 119991, Moscow, Russian Federation
- M. V. Lomonosov Moscow State University, Department of Chemistry, Leninskie gory 1-3, 119234, Moscow, Russian Federation
| | - Alexander S. Kucherenko
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, 119991, Moscow, Russian Federation
| | - Sergei G. Zlotin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, 119991, Moscow, Russian Federation
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7
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Olifir OS, Chernykh AV, Dobrydnev AV, Grygorenko OO, Moroz YS, Voitenko ZV, Radchenko DS. Multigram Synthesis of Advanced 6,6-Difluorospiro[3.3]heptane-derived Building Blocks. European J Org Chem 2021; 2021:6541-6550. [PMID: 35095338 PMCID: PMC8791643 DOI: 10.1002/ejoc.202000432] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Indexed: 01/21/2024]
Abstract
A convenient methodology for constructing 6,6-difluorospiro[3.3]heptane scaffold - a conformationally restricted isostere of gem-difluorocycloalkanes - is developed. Alarge array of novel 2-mono- and 2,2-bifunctionalized difluorospiro[3.3]heptane building blocks was obtained through the convergent synthesis strategy using a common synthetic precursor - 1,1-bis(bromomethyl)-3,3-difluorocyclobutane. The target compounds and intermediates were prepared by short reaction sequences (6-10 steps) on multigram scale (up to 0.47 kg).
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Affiliation(s)
- Oleksandr S Olifir
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv 01601, Ukraine
| | - Anton V Chernykh
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine
| | - Alexey V Dobrydnev
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv 01601, Ukraine
| | - Oleksandr O Grygorenko
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv 01601, Ukraine
| | - Yuriy S Moroz
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv 01601, Ukraine
- Chemspace, Ilukstes iela 38-5, Riga, LV-1082, Latvia
| | - Zoia V Voitenko
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv 01601, Ukraine
| | - Dmytro S Radchenko
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine
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8
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Grygorenko OO, Volochnyuk DM, Vashchenko BV. Emerging Building Blocks for Medicinal Chemistry: Recent Synthetic Advances. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100857] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Oleksandr O. Grygorenko
- Enamine Ltd. Chervonotkatska 78 Kyiv 02094 Ukraine
- Taras Shevchenko National University of Kyiv Volodymyrska Street 60 Kyiv 01601 Ukraine
| | - Dmitriy M. Volochnyuk
- Enamine Ltd. Chervonotkatska 78 Kyiv 02094 Ukraine
- Taras Shevchenko National University of Kyiv Volodymyrska Street 60 Kyiv 01601 Ukraine
- Institute of Organic Chemistry National Academy of Sciences of Ukraine Murmanska Street 5 Kyiv 02094 Ukraine
| | - Bohdan V. Vashchenko
- Enamine Ltd. Chervonotkatska 78 Kyiv 02094 Ukraine
- Taras Shevchenko National University of Kyiv Volodymyrska Street 60 Kyiv 01601 Ukraine
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9
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Simlandy AK, Lyu MY, Brown MK. Catalytic Arylboration of Spirocyclic Cyclobutenes: Rapid Access to Highly Substituted Spiro[3.n]alkanes. ACS Catal 2021; 11:12815-12820. [PMID: 35464106 DOI: 10.1021/acscatal.1c03491] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A method to achieve the synthesis of highly substituted spirocyclic cyclobutanes is disclosed. The reaction involves the catalytic arylboration of cyclobutenes. Depending on the substitution pattern of the cyclobutene, either a Cu/Pd- or a Ni-catalyzed reaction was utilized. In the case of the Cu/Pd catalyzed reactions, the identification of a Cu-complex for arylboration was crucial to observe high selectivity. The synthetic utility of the products is demonstrated, and the mechanistic details are discussed.
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Affiliation(s)
- Amit Kumar Simlandy
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave. Bloomington, Indiana 47405, United States
| | - Mao-Yun Lyu
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave. Bloomington, Indiana 47405, United States
| | - M. Kevin Brown
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave. Bloomington, Indiana 47405, United States
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10
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Abstract
![]()
We present a strategy for the synthesis
of spirocyclic cyclobutanes
with modulable exit vectors based on the regioselective monoborylation
of spirocyclobutenes. Using an inexpensive copper salt and a commercially
available bidentate phosphine, a broad variety of borylated spirocycles
have been prepared with complete regiocontrol. The boryl moiety provides
a synthetic handled for further functionalization, allowing access
to a wide array of spirocyclic building blocks from a common intermediate.
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Affiliation(s)
- Luis Nóvoa
- Departamento de Química Orgánica and Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Laura Trulli
- Departamento de Química Orgánica and Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Israel Fernández
- Departamento de Química Orgánica I y Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Alejandro Parra
- Departamento de Química Orgánica and Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Mariola Tortosa
- Departamento de Química Orgánica and Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
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11
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Malashchuk A, Chernykh AV, Dobrydnev AV, Grygorenko OO. Fluorine‐Labelled Spiro[3.3]heptane‐Derived Building Blocks: Is Single Fluorine the Best? European J Org Chem 2021. [DOI: 10.1002/ejoc.202100804] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Andrii Malashchuk
- Enamine Ltd. Chervonotkatska Street 78 Kyiv 02094 Ukraine
- Taras Shevchenko National University of Kyiv Volodymyrska Street 60 Kyiv 01601 Ukraine
| | - Anton V. Chernykh
- Enamine Ltd. Chervonotkatska Street 78 Kyiv 02094 Ukraine
- Taras Shevchenko National University of Kyiv Volodymyrska Street 60 Kyiv 01601 Ukraine
| | - Alexey V. Dobrydnev
- Enamine Ltd. Chervonotkatska Street 78 Kyiv 02094 Ukraine
- Taras Shevchenko National University of Kyiv Volodymyrska Street 60 Kyiv 01601 Ukraine
| | - Oleksandr O. Grygorenko
- Enamine Ltd. Chervonotkatska Street 78 Kyiv 02094 Ukraine
- Taras Shevchenko National University of Kyiv Volodymyrska Street 60 Kyiv 01601 Ukraine
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12
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Affiliation(s)
| | - Samir Z. Zard
- Laboratoire de Synthèse Organique CNRS UMR 7652 Ecole Polytechnique FR-91128 Palaiseau France
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13
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Nóvoa L, Trulli L, Parra A, Tortosa M. Stereoselective Diboration of Spirocyclobutenes: A Platform for the Synthesis of Spirocycles with Orthogonal Exit Vectors. Angew Chem Int Ed Engl 2021; 60:11763-11768. [PMID: 33689223 DOI: 10.1002/anie.202101445] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Indexed: 12/13/2022]
Abstract
The diastereo- and enantioselective diboration of spirocyclobutenes provides a platform for the rapid preparation of a wide variety of chiral spirocyclic building blocks. The chemoselective functionalization of the carbon-boron bond in the products, including a stereospecific sp3 -sp2 Suzuki-Miyaura cross-coupling reaction, provides a powerful tool to control the directionality and the nature of the exit vectors in the spirocyclic framework.
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Affiliation(s)
- Luis Nóvoa
- Organic Chemistry Department, Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Laura Trulli
- Organic Chemistry Department, Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Alejandro Parra
- Organic Chemistry Department, Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Mariola Tortosa
- Organic Chemistry Department, Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain
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14
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Tyler JL, Noble A, Aggarwal VK. Strain-Release Driven Spirocyclization of Azabicyclo[1.1.0]butyl Ketones. Angew Chem Int Ed Engl 2021; 60:11824-11829. [PMID: 33754432 PMCID: PMC8251566 DOI: 10.1002/anie.202102754] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Indexed: 12/16/2022]
Abstract
Due to their intrinsic rigidity, three-dimensionality and structural novelty, spirocyclic molecules have become increasingly sought-after moieties in drug discovery. Herein, we report a strain-release driven synthesis of azetidine-containing spirocycles by harnessing the inherent ring strain of the azabicyclo[1.1.0]butane (ABB) fragment. Novel ABB-ketone precursors bearing silyl-protected alcohols were synthesized in a single step and shown to engage in electrophile-induced spirocyclization-desilylation reactions. Primary, secondary and tertiary silyl ethers were effectively transformed into a library of new spiro-azetidines, with a range of substituents and ring sizes. In addition, the products are generated with synthetically useful ketone and protected-amine functional groups, which provides the potential for further elaboration and for this chemistry to be utilized in the rapid assembly of medicinally relevant compounds.
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Affiliation(s)
- Jasper L. Tyler
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
| | - Adam Noble
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
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15
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Zhang X, Zhang Q, Li L, Cao S, Liu Z, Zanoni G, Ning Y, Wu Y. Fluorocyclization of Allyl Alcohols and Amines to Access 3-Functionalized Oxetanes and Azetidines. Org Lett 2021; 23:3674-3679. [PMID: 33881893 DOI: 10.1021/acs.orglett.1c01062] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient method to prepare 3-functionalized oxetanes and azetidines has been realized by fluorocyclization of readily available 2-azidoallyl/2-alkoxyallyl alcohols and amines. Notably, this is the first example applying the fluorocyclization strategy to construct four-membered heterocycles. The pendant electron-donating group (-N3 or -OR) plays a crucial role in polarizing the C═C double bond and facilitating the cyclization process, as verified by DFT and experimental studies.
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Affiliation(s)
- Xinyu Zhang
- Department of Chemistry Northeast Normal University, Changchun 130024, China
| | - Qi Zhang
- Department of Chemistry Northeast Normal University, Changchun 130024, China
| | - Linxuan Li
- Department of Chemistry Northeast Normal University, Changchun 130024, China
| | - Shanshan Cao
- Department of Chemistry Northeast Normal University, Changchun 130024, China
| | - Zhaohong Liu
- Department of Chemistry Northeast Normal University, Changchun 130024, China
| | - Giuseppe Zanoni
- Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Yongquan Ning
- Department of Chemistry Northeast Normal University, Changchun 130024, China
| | - Yong Wu
- Department of Chemistry Northeast Normal University, Changchun 130024, China
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16
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Für CS, Horváth EJ, Szigetvári Á, Dékány M, Hazai L, Keglevich G, Bölcskei H. Synthesis of Spiro[cycloalkane-pyridazinones] with High Fsp3 Character Part 2*. LETT ORG CHEM 2021. [DOI: 10.2174/1570178617999200728214211] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract:
An extended compound library of spiro[cycloalkane-pyridazinones] with a high Fsp3 character
is targeted. There are two possibilities to improve the physicochemical parameters of a drug candidate
molecules or building blocks, either to replace the aromatic systems with bioisoster heteroaromatic
moieties, e.g. with one or two nitrogen containing ring systems (pyridines, pyridazines, pyrimidines,
etc.), or to increase the Fsp3 character of the compounds. Using a new synthetic approach,
the Grignard reaction of 2-oxaspiro[4.5]decane-1,3-dione and 2-oxaspiro[4.4]nonane-1,3-dione with
p-halophenyl- or p-alkylphenyl-magnesium bromide resulted in the formation of the corresponding
2-oxoethyl-cycloalkanecarboxylic acids, which served as starting materials for the pyridazinones by
reaction with hydrazine or phenylhydrazine. The pyridazinones obtained were alkylated with methyliodide
or benzylbromide. 16 Novel 4-tolyl- or 4-halophenyl-2,3-diazaspiro[5.5]undec-3-en-1-one and
4-tolyl- or 4-halopyhenyl-7,8-diazaspiro[4.5]dec-8-en-6-one, and their N-methyl, N-benzyl, and
N-phenyl derivatives were synthetized. The physicochemical parameters and the Fsp3 character of the
novel compounds obtained were studied. A few of them showed excellent logP and clogP values, but
the introduction of a further phenyl group seemed to be disadvantageous.
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Affiliation(s)
- Csilla Sepsey Für
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, H-1521 Budapest,Hungary
| | - Eszter Judit Horváth
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, H-1521 Budapest,Hungary
| | - Áron Szigetvári
- Gedeon Richter Plc. Budapest X., Gyömrői út 19-21, Budapest 10. Pf.27. H-1475,Hungary
| | - Miklós Dékány
- Gedeon Richter Plc. Budapest X., Gyömrői út 19-21, Budapest 10. Pf.27. H-1475,Hungary
| | - László Hazai
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, H-1521 Budapest,Hungary
| | - György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, H-1521 Budapest,Hungary
| | - Hedvig Bölcskei
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, H-1521 Budapest,Hungary
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17
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Tyler JL, Noble A, Aggarwal VK. Strain‐Release Driven Spirocyclization of Azabicyclo[1.1.0]butyl Ketones. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102754] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jasper L. Tyler
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Adam Noble
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
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18
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Hayrapetyan D, Stepanova V. Facile Synthesis of Spirocyclic Lactams via [3+2] and [3+3] Aza‐Annulation Reactions. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Davit Hayrapetyan
- Department of Chemistry School of Sciences and Humanities Nazarbayev University 53 Kabanbay Batyr Ave. 010000 Nur-Sultan Kazakhstan
| | - Valeriya Stepanova
- Department of Chemistry School of Sciences and Humanities Nazarbayev University 53 Kabanbay Batyr Ave. 010000 Nur-Sultan Kazakhstan
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19
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Nóvoa L, Trulli L, Parra A, Tortosa M. Stereoselective Diboration of Spirocyclobutenes: A Platform for the Synthesis of Spirocycles with Orthogonal Exit Vectors. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101445] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Luis Nóvoa
- Organic Chemistry Department Institute for Advanced Research in Chemical Sciences (IAdChem) Universidad Autónoma de Madrid 28049 Madrid Spain
| | - Laura Trulli
- Organic Chemistry Department Institute for Advanced Research in Chemical Sciences (IAdChem) Universidad Autónoma de Madrid 28049 Madrid Spain
| | - Alejandro Parra
- Organic Chemistry Department Institute for Advanced Research in Chemical Sciences (IAdChem) Universidad Autónoma de Madrid 28049 Madrid Spain
| | - Mariola Tortosa
- Organic Chemistry Department Institute for Advanced Research in Chemical Sciences (IAdChem) Universidad Autónoma de Madrid 28049 Madrid Spain
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20
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Novel Ring Systems: Spiro[Cycloalkane] Derivatives of Triazolo- and Tetrazolo-Pyridazines. Molecules 2021; 26:molecules26082140. [PMID: 33917797 PMCID: PMC8068119 DOI: 10.3390/molecules26082140] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 04/01/2021] [Accepted: 04/05/2021] [Indexed: 11/16/2022] Open
Abstract
In orderto synthesize new pyridazine derivatives anellated with different nitrogen heterocyclic moieties, spiro[cycloalkane]pyridazinones were transformed into the corresponding thioxo derivatives via a reaction with phosphorus pentasulfide. The reaction of the formed 2,3-diazaspiro[5.5]undec-3-ene-1-thiones with hydrazine provided the corresponding 1-hydrazono-2,3-diazaspiro[5.5]undec-3-ene, whose diazotization led to the desired spiro[cyclohexane-1,8′-tetrazolo[1,5-b]pyridazines. The reaction of dihydropyridazinethiones with benzhydrazide afforded the corresponding 7H-spiro[[1,2,4]triazolo[4,3-b]pyridazin-8,1′-cyclohexanes]. As a result of our work, seven new pyridazinethione intermediates were prepared, which served as starting materials for the synthesis of two kinds of new ring systems: tetrazolo-pyridazines and triazolo-pyridazines. The six new annulated derivatives were characterized by physicochemical parameters. The new N-heterocycles are valuable members of the large family of pyridazines.
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21
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Hugentobler KM, Carreira EM. Discovery and Surprises with Cyclizations, Cycloadditions, Fragmentations, and Rearrangements in Complex Settings. Acc Chem Res 2021; 54:890-902. [PMID: 33533583 DOI: 10.1021/acs.accounts.0c00814] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We discuss a number of synthesis routes to complex natural products recently reported from our group. Although the structures are quite varied, we demonstrate the research endeavor as a setting to examine the implementation of cyclizations, cycloadditions, rearrangements, and fragmentations. We showcase how the various transformations enabled access to key core structures and thereby allowed the rapid introduction of complexity. Two different routes to (-)-mitrephorone A, the first case discussed, led to the use of Koser's reagent to effect oxetane formation from diosphenol derivatives. Even though the Diels-Alder cycloaddition reaction represents one of the workhorses of complex molecule synthesis, there are opportunities provided by the complexity of secondary metabolites for discovery, study, and development. In our first approach to (-)-mitrephorone A, Diels-Alder cycloaddition provided access to fused cyclopropanes, while the second synthesis underscored the power of diastereoselective nitrile oxide cycloadditions to access hydroxy ketones. The successful implementation of the second approach required the rigorous stereocontrolled synthesis of tetrasubstituted olefins; this was accomplished by a highly stereoselective Cr-mediated reduction of dienes. The diterpenoid (+)-sarcophytin provided a stage for examining the Diels-Alder cycloaddition of two electron-deficient partners. The study revealed that in the system this unusual combination works optimally with the E,Z-dienoate and proceeds through an exo transition state to provide the desired cycloadduct. Our reported pallambin synthesis showcased the use of fulvene as a versatile building block for the core structure. Fulvene decomposition could be outcompeted by employing it as a diene and using a highly reactive dienophile, which affords a bicyclic product that can in turn be subjected to chemo- and stereoselective manipulations. The synthesis route proceeds with a C-H insertion providing the core structure en route to pallambin A and B. The studies resulting in our synthesis of gelsemoxonine highlight the use of the acid-catalyzed rearrangement/chelotropic extrusion of oxazaspiro[2.4]heptanes to access complex β-lactams, which are otherwise not readily prepared by extant methods in common use. Mechanistic investigations of the intriguing ring contraction supported by computational studies indicate that the reaction involves a concerted cleavage of the N-O bond and cyclopropane ring opening under the extrusion of ethylene. The synthesis of guanacastepenes focused on the use of cyclohexyne in [2+2]-cycloadditions with enolates. The resulting cyclobutene can be enticed to undergo ring opening to give a fused six-seven ring system. The cycloinsertion reaction of cyclohexyne developed for the first time proves useful as a general approach to complex fused ring systems.
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Affiliation(s)
- Karina M. Hugentobler
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich, Switzerland
| | - Erick M. Carreira
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich, Switzerland
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22
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Abstract
It is well established that medicinal chemists should depart from the flat, sp2-dominated nature of traditional drugs and incorporate complexities of bioactive natural products, such as sp3-richness, 3D topology and chirality. There is a gray area, however, in the relevance of newly developed chemical scaffolds that exhibit these complexities but do not correlate to anything observed in nature. This can leave synthetic methodologists searching for structural similarities between their newly developed products and known natural products in search of justification. This article offers a perspective on how these types of complex 'abiotic' scaffolds can be appreciated purely on the basis of their structural novelty, and identifies the unique advantages arising when a complex chemical entity unrecognized by nature is introduced to biological systems.
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23
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Radia AJ, Lalpara JN, Modasiya IJ, Dubal GG. Design and synthesis of novel 1,3,4‐oxadiazole based azaspirocycles catalyzed by
NaI
under mild condition and evaluated their antidiabetic and antibacterial activities. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.4200] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ashish J. Radia
- Department of Chemistry, School of Science RK University Rajkot India
| | | | - Ishita J. Modasiya
- Department of Microbiology, School of Science RK University Rajkot India
| | - Gaurang G. Dubal
- Department of Chemistry, School of Science RK University Rajkot India
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24
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Abstract
The large originator pharmaceutical companies need more and more new compounds for their molecule banks, because high throughput screening (HTS) is still a widely used method to find new hits in the course of the lead discovery. In the design and synthesis of a new compound library, important points are in focus nowadays: Lipinski’s rule of five (RO5); the high Fsp3 character; the use of bioisosteric heterocycles instead of aromatic rings. With said aim in mind, we have synthesized a small compound library of new spiro[cycloalkane-pyridazinones] with 36 members. The compounds with this new scaffold may be useful in various drug discovery projects.
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25
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Ye LW, Zhu XQ, Sahani RL, Xu Y, Qian PC, Liu RS. Nitrene Transfer and Carbene Transfer in Gold Catalysis. Chem Rev 2020; 121:9039-9112. [PMID: 32786423 DOI: 10.1021/acs.chemrev.0c00348] [Citation(s) in RCA: 192] [Impact Index Per Article: 48.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Catalytic transformations involving metal carbenes are considered one of the most important aspects of homogeneous transition metal catalysis. Recently, gold-catalyzed generation of gold carbenes from readily available alkynes represents a significant advance in metal carbene chemistry. This Review summarizes the advances in the gold-catalyzed nitrene-transfer reactions of alkynes with nitrogen-transfer reagents, such as azides, nitrogen ylides, isoxazoles, and anthranils, and gold-catalyzed carbene-transfer reactions, involving oxygen atom-transfer reactions of alkynes with nitro compounds, nitrones, sulfoxides, and pyridine N-oxides, through the presumable α-imino gold carbene and α-oxo gold carbene intermediates, respectively. Gold-catalyzed processes are reviewed by highlighting their product diversity, selectivity, and applicability, and the mechanistic rationale is presented where possible.
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Affiliation(s)
- Long-Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
| | - Xin-Qi Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Rajkumar Lalji Sahani
- Department of Chemistry, National Tsing-Hua University, Hsinchu 30013, Taiwan, Republic of China
| | - Yin Xu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Peng-Cheng Qian
- Institute of New Materials & Industry Technology, College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, P. R. China
| | - Rai-Shung Liu
- Department of Chemistry, National Tsing-Hua University, Hsinchu 30013, Taiwan, Republic of China
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26
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King TA, Stewart HL, Mortensen KT, North AJP, Sore HF, Spring DR. Cycloaddition Strategies for the Synthesis of Diverse Heterocyclic Spirocycles for Fragment-Based Drug Discovery. European J Org Chem 2019; 2019:5219-5229. [PMID: 31598091 PMCID: PMC6774287 DOI: 10.1002/ejoc.201900847] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Indexed: 12/21/2022]
Abstract
In recent years the pharmaceutical industry has benefited from the advances made in fragment-based drug discovery (FBDD) with more than 30 fragment-derived drugs currently marketed or progressing through clinical trials. The success of fragment-based drug discovery is entirely dependent upon the composition of the fragment screening libraries used. Heterocycles are prevalent within marketed drugs due to the role they play in providing binding interactions; consequently, heterocyclic fragments are important components of FBDD libraries. Current screening libraries are dominated by flat, sp2-rich compounds, primarily owing to their synthetic tractability, despite the superior physicochemical properties displayed by more three-dimensional scaffolds. Herein, we report step-efficient routes to a number of biologically relevant, fragment-like heterocyclic spirocycles. The use of both electron-deficient and electron-rich 2-atom donors was explored in complexity-generating [3+2]-cycloadditions to furnish products in 3 steps from commercially available starting materials. The resulting compounds were primed for further fragment elaboration through the inclusion of synthetic handles from the outset of the syntheses.
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Affiliation(s)
- Thomas A. King
- Department of ChemistryUniversity of CambridgeLensfield Road1EWCambridgeCB21EW
| | - Hannah L. Stewart
- Department of ChemistryUniversity of CambridgeLensfield Road1EWCambridgeCB21EW
| | - Kim T. Mortensen
- Department of ChemistryUniversity of CambridgeLensfield Road1EWCambridgeCB21EW
| | - Andrew J. P. North
- Department of ChemistryUniversity of CambridgeLensfield Road1EWCambridgeCB21EW
| | - Hannah F. Sore
- Department of ChemistryUniversity of CambridgeLensfield Road1EWCambridgeCB21EW
| | - David R. Spring
- Department of ChemistryUniversity of CambridgeLensfield Road1EWCambridgeCB21EW
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27
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Reddy LR, Waman Y, Nayak K, Baharooni K, Kotturi S. Asymmetric Synthesis 1-Substituted 2,6-Diazaspiro[3.3]heptanes through Addition of 3-Azetidinecarboxylate Anions to Davis-Ellman Imines. Org Lett 2019; 21:3481-3484. [PMID: 30908052 DOI: 10.1021/acs.orglett.9b00564] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Asymmetric synthesis of 1-substituted 2,6-diazaspiro[3.3]heptane is described. This methodology affords excellent yields (up to 89%) and high diastereomeric ratios ( dr up to 98:2) and delivers differentially protected amines within the products.
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Affiliation(s)
- Leleti Rajender Reddy
- Route Scouting Department, Piramal Discovery Solutions , Pharmaceutical Special Economic Zone , Sarkhej Bavla Highway , Ahmedabad , Gujarat 382213 , India
| | - Yogesh Waman
- Route Scouting Department, Piramal Discovery Solutions , Pharmaceutical Special Economic Zone , Sarkhej Bavla Highway , Ahmedabad , Gujarat 382213 , India
| | - Krishna Nayak
- Route Scouting Department, Piramal Discovery Solutions , Pharmaceutical Special Economic Zone , Sarkhej Bavla Highway , Ahmedabad , Gujarat 382213 , India
| | - Kasimraza Baharooni
- Route Scouting Department, Piramal Discovery Solutions , Pharmaceutical Special Economic Zone , Sarkhej Bavla Highway , Ahmedabad , Gujarat 382213 , India
| | - Sharadsrikar Kotturi
- Route Scouting Department, Piramal Discovery Solutions , Pharmaceutical Special Economic Zone , Sarkhej Bavla Highway , Ahmedabad , Gujarat 382213 , India
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28
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Rout SK, Marghem G, Lan J, Leyssens T, Riant O. A radical exchange process: synthesis of bicyclo[1.1.1]pentane derivatives of xanthates. Chem Commun (Camb) 2019; 55:14976-14979. [DOI: 10.1039/c9cc07610g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A new approach for the installation of the bicyclo[1.1.1]pentane unit on the xanthate moiety by means of a radical exchange process.
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Affiliation(s)
- Saroj Kumar Rout
- Institute of Condensed Matter and Nanoscience. Molecular Chemistry
- Materials and Catalysis Division
- Université Catholique de Louvain
- Belgium
| | - Gilles Marghem
- Institute of Condensed Matter and Nanoscience. Molecular Chemistry
- Materials and Catalysis Division
- Université Catholique de Louvain
- Belgium
| | - Junjie Lan
- Institute of Condensed Matter and Nanoscience. Molecular Chemistry
- Materials and Catalysis Division
- Université Catholique de Louvain
- Belgium
| | - Tom Leyssens
- Institute of Condensed Matter and Nanoscience. Molecular Chemistry
- Materials and Catalysis Division
- Université Catholique de Louvain
- Belgium
| | - Olivier Riant
- Institute of Condensed Matter and Nanoscience. Molecular Chemistry
- Materials and Catalysis Division
- Université Catholique de Louvain
- Belgium
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29
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Yang W, Wang X, Jin X, Sun H, Guo R, Xu W, Cai Q. Copper‐Catalysed Double
O
‐Arylation for Enantioselective Synthesis of
oxa
‐Spirocycles. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801395] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Wenqiang Yang
- College of pharmacyLinyi University Shuangling Road Linyi 276000 People's Republic of China
| | - Xingyuan Wang
- College of pharmacyLinyi University Shuangling Road Linyi 276000 People's Republic of China
| | - Xiao Jin
- College of pharmacyLinyi University Shuangling Road Linyi 276000 People's Republic of China
| | - Han Sun
- College of pharmacyLinyi University Shuangling Road Linyi 276000 People's Republic of China
| | - Runan Guo
- College of pharmacyLinyi University Shuangling Road Linyi 276000 People's Republic of China
| | - Wei Xu
- College of PharmacyJinan University No.601 Huangpu Avenue West Guangzhou 510530 People's Republic of China
| | - Qian Cai
- College of PharmacyJinan University No.601 Huangpu Avenue West Guangzhou 510530 People's Republic of China
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30
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Synthesis of 9-nitro-5H-spiro[benzo[b]tetrazolo[1,5-d][1,4]oxazepine-4,2′-oxirane] via an unusual ring-expansion. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.10.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Kirichok AA, Shton IO, Pishel IM, Zozulya SA, Borysko PO, Kubyshkin V, Zaporozhets OA, Tolmachev AA, Mykhailiuk PK. Synthesis of Multifunctional Spirocyclic Azetidines and Their Application in Drug Discovery. Chemistry 2018; 24:5444-5449. [PMID: 29338097 DOI: 10.1002/chem.201800193] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Indexed: 11/12/2022]
Abstract
The synthesis of multifunctional spirocycles was achieved from common cyclic carboxylic acids (cyclobutane carboxylate, cyclopentane carboxylate, l-proline, etc.). The whole sequence included only two chemical steps-synthesis of azetidinones, and reduction into azetidines. The obtained spirocyclic amino acids were incorporated into a structure of the known anesthetic drug Bupivacaine. The obtained analogues were more active and less toxic than the original drug. We believe that this discovery will lead to a wide use of spirocyclic building blocks in drug discovery in the near future.
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Affiliation(s)
| | - Irina O Shton
- Enamine Ltd./Bienta, Chervonotkatska 78, 02094, Kyiv, Ukraine
| | - Irina M Pishel
- Enamine Ltd./Bienta, Chervonotkatska 78, 02094, Kyiv, Ukraine
| | - Sergey A Zozulya
- Enamine Ltd./Bienta, Chervonotkatska 78, 02094, Kyiv, Ukraine.,Taras Shevchenko National, University of Kyiv, Chemistry Department, Volodymyrska 64, 01601, Kyiv, Ukraine
| | - Petro O Borysko
- Enamine Ltd./Bienta, Chervonotkatska 78, 02094, Kyiv, Ukraine
| | - Vladimir Kubyshkin
- Institute of Chemistry, Technical University of Berlin, Müller-Breslau-Strasse 10, 10623, Berlin, Germany
| | - Olha A Zaporozhets
- Taras Shevchenko National, University of Kyiv, Chemistry Department, Volodymyrska 64, 01601, Kyiv, Ukraine
| | | | - Pavel K Mykhailiuk
- Enamine Ltd./Bienta, Chervonotkatska 78, 02094, Kyiv, Ukraine.,Taras Shevchenko National, University of Kyiv, Chemistry Department, Volodymyrska 64, 01601, Kyiv, Ukraine
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32
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Kim Y, Kim ST, Kang D, Sohn TI, Jang E, Baik MH, Hong S. Stereoselective construction of sterically hindered oxaspirocycles via chiral bidentate directing group-mediated C(sp 3)-O bond formation. Chem Sci 2018; 9:1473-1480. [PMID: 29629170 PMCID: PMC5875089 DOI: 10.1039/c7sc04691j] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 11/26/2017] [Indexed: 12/20/2022] Open
Abstract
The systematic investigation of chiral bidentate auxiliaries has resulted in the discovery of a chiral 2,2-dimethyl-1-(pyridin-2-yl)propan-1-amine-derived directing group that enables stereoselective palladium(ii)-catalyzed intramolecular C(sp3)-O bond formation. This new chiral directing group exhibited high reactivity in the activation of methylene C(sp3)-H bonds with excellent levels of stereoselectivity (a diastereomeric ratio of up to 39 : 1), which allowed the construction of a wide range of oxaspirocycles. Mechanistic investigations were also conducted to elucidate the reaction mechanism and understand the origin of the diastereoselectivity. DFT calculations suggest that only modest levels of diastereoselectivity are accomplished at the rate-determining C-H metalation-deprotonation step and the d.r. is further enriched at the reductive elimination step.
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Affiliation(s)
- Yechan Kim
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon , 34141 , Korea . ;
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Korea
| | - Seoung-Tae Kim
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon , 34141 , Korea . ;
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Korea
| | - Dahye Kang
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon , 34141 , Korea . ;
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Korea
| | - Te-Ik Sohn
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon , 34141 , Korea . ;
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Korea
| | - Eunyoung Jang
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon , 34141 , Korea . ;
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Korea
| | - Mu-Hyun Baik
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon , 34141 , Korea . ;
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Korea
| | - Sungwoo Hong
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon , 34141 , Korea . ;
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Korea
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33
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Geary GC, Nortcliffe A, Pearce CA, Hamza D, Jones G, Moody CJ. Densely functionalised spirocyclic oxetane-piperidine scaffolds for drug discovery. Bioorg Med Chem 2018; 26:791-797. [DOI: 10.1016/j.bmc.2017.12.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 12/05/2017] [Accepted: 12/07/2017] [Indexed: 10/18/2022]
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34
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Zheng D, Qiu X, Liu C, Jiao X, He S, Zhao L, Zeng X. Synthesis and bioapplication of a highly selective and sensitive fluorescent probe for HOCl based on a phenothiazine–dicyanoisophorone conjugate with large Stokes shift. NEW J CHEM 2018. [DOI: 10.1039/c8nj00279g] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A fluorescent probe with a large Stokes shift for monitoring endogenous HOCl in living cells has been prepared.
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Affiliation(s)
- Dasheng Zheng
- Tianjin Key Laboratory for Photoelectric Materials and Devices
- School of Materials Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
- China
| | - Xiaoying Qiu
- Tianjin Key Laboratory for Photoelectric Materials and Devices
- School of Materials Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
- China
| | - Chang Liu
- Tianjin Key Laboratory for Photoelectric Materials and Devices
- School of Materials Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
- China
| | - Xiaojie Jiao
- Tianjin Key Laboratory for Photoelectric Materials and Devices
- School of Materials Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
- China
| | - Song He
- Tianjin Key Laboratory for Photoelectric Materials and Devices
- School of Materials Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
- China
| | - Liancheng Zhao
- Tianjin Key Laboratory for Photoelectric Materials and Devices
- School of Materials Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
- China
| | - Xianshun Zeng
- Tianjin Key Laboratory for Photoelectric Materials and Devices
- School of Materials Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
- China
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35
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Zhang W, Huo F, Yin C. Recent advances of dicyano-based materials in biology and medicine. J Mater Chem B 2018; 6:6919-6929. [DOI: 10.1039/c8tb02205d] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We highlight the development of dicyano-based fluorescent materials in biology and medicine.
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Affiliation(s)
- Weijie Zhang
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education
- Key Laboratory of Materials for Energy
- Conversion and Storage of Shanxi Province
- Institute of Molecular Science
- Shanxi University
| | - Fangjun Huo
- Research Institute of Applied Chemistry
- Shanxi University
- Taiyuan 030006
- China
| | - Caixia Yin
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education
- Key Laboratory of Materials for Energy
- Conversion and Storage of Shanxi Province
- Institute of Molecular Science
- Shanxi University
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36
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Kanazawa J, Maeda K, Uchiyama M. Radical Multicomponent Carboamination of [1.1.1]Propellane. J Am Chem Soc 2017; 139:17791-17794. [PMID: 29131599 DOI: 10.1021/jacs.7b11865] [Citation(s) in RCA: 122] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Three-dimensional, small-ring scaffolds are very important in modern drug discovery to expand the available drug-like chemical space and to optimize drug candidates. Among them, bicyclo[1.1.1]pentane (BCP) is regarded as a high-value bioisostere for a phenyl ring or tert-butyl group; it provides an option to generate drug-like molecules with good passive permeability, high aqueous solubility, and improved metabolic stability, though the lack of methodology to functionalize BCP remains a significant challenge. Here we present an efficient method, developed with the aid of density functional theory calculations, for the synthesis of multifunctionalized BCP derivatives by means of a radical multicomponent carboamination of [1.1.1]propellane. This reaction features mild conditions, one-pot operation, and gram-scale synthetic capability, and opens up a unique and highly efficient route for the synthesis of multifunctionalized BCP derivatives, including synthetically useful 3-substituted BCP-amines.
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Affiliation(s)
- Junichiro Kanazawa
- Central Pharmaceutical Research Institute, Japan Tobacco Inc. , 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan.,Elements Chemistry Laboratory, RIKEN , 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Katsuya Maeda
- Central Pharmaceutical Research Institute, Japan Tobacco Inc. , 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Masanobu Uchiyama
- Elements Chemistry Laboratory, RIKEN , 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.,Graduate School of Pharmaceutical Sciences, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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37
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Chalyk BA, Isakov AA, Butko MV, Hrebeniuk KV, Savych OV, Kucher OV, Gavrilenko KS, Druzhenko TV, Yarmolchuk VS, Zozulya S, Mykhailiuk PK. Synthesis of 6-Azaspiro[4.3]alkanes: Innovative Scaffolds for Drug Discovery. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700536] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
| | - Andrei A. Isakov
- Enamine Ltd.; Chervonotkatska 78 02094 Kyiv Ukraine
- Department of Chemistry; Taras Shevchenko National University of Kyiv; Volodymyrska 64 01601 Kyiv Ukraine
| | - Maryna V. Butko
- Enamine Ltd.; Chervonotkatska 78 02094 Kyiv Ukraine
- Department of Chemical Technology; National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”; Prosp. Peremohy 37 03056 Kyiv Ukraine
| | | | - Olena V. Savych
- Enamine Ltd.; Chervonotkatska 78 02094 Kyiv Ukraine
- Department of Chemistry; Taras Shevchenko National University of Kyiv; Volodymyrska 64 01601 Kyiv Ukraine
| | - Olexandr V. Kucher
- Enamine Ltd.; Chervonotkatska 78 02094 Kyiv Ukraine
- Institute of Bioorganic Chemistry and Petrochemistry; National Academy of Sciences of Ukraine; Murmanska Street 1 02094 Kyiv Ukraine
| | - Konstantin S. Gavrilenko
- Enamine Ltd.; Chervonotkatska 78 02094 Kyiv Ukraine
- ChemBioCenter; Taras Shevchenko National University of Kyiv; Volodymyrska 64 01601 Kyiv Ukraine
| | - Tetiana V. Druzhenko
- Enamine Ltd.; Chervonotkatska 78 02094 Kyiv Ukraine
- Institute of High Technologies; Taras Shevchenko National University of Kyiv; Hlushkova Avenue, 4G 03022 Kyiv Ukraine
| | - Vladimir S. Yarmolchuk
- Enamine Ltd.; Chervonotkatska 78 02094 Kyiv Ukraine
- Institute of High Technologies; Taras Shevchenko National University of Kyiv; Hlushkova Avenue, 4G 03022 Kyiv Ukraine
| | - Sergey Zozulya
- Enamine Ltd.; Chervonotkatska 78 02094 Kyiv Ukraine
- ChemBioCenter; Taras Shevchenko National University of Kyiv; Volodymyrska 64 01601 Kyiv Ukraine
| | - Pavel K. Mykhailiuk
- Department of Chemistry; Taras Shevchenko National University of Kyiv; Volodymyrska 64 01601 Kyiv Ukraine
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38
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Kirichok AA, Shton I, Kliachyna M, Pishel I, Mykhailiuk PK. 1-Substituted 2-Azaspiro[3.3]heptanes: Overlooked Motifs for Drug Discovery. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703801] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
| | - Iryna Shton
- Enamine Ltd./Bienta; Chervonotkatska 78 02094 Kyiv Ukraine
| | | | - Iryna Pishel
- Enamine Ltd./Bienta; Chervonotkatska 78 02094 Kyiv Ukraine
| | - Pavel K. Mykhailiuk
- Taras Shevchenko National University of Kyiv; Chemistry Department; Volodymyrska 64 01601 Kyiv Ukraine
- Enamine Ltd./Bienta; Chervonotkatska 78 02094 Kyiv Ukraine
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39
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Kirichok AA, Shton I, Kliachyna M, Pishel I, Mykhailiuk PK. 1-Substituted 2-Azaspiro[3.3]heptanes: Overlooked Motifs for Drug Discovery. Angew Chem Int Ed Engl 2017; 56:8865-8869. [PMID: 28510279 DOI: 10.1002/anie.201703801] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 05/15/2017] [Indexed: 01/28/2023]
Abstract
The 2-substituted piperidine core is found in drugs (18 FDA-approved drugs), however, their spirocyclic analogues remain unknown. Described here is the synthesis of spirocyclic analogues for 2-substituted piperidines and a demonstration of their validation in drug discovery.
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Affiliation(s)
| | - Iryna Shton
- Enamine Ltd./Bienta, Chervonotkatska 78, 02094, Kyiv, Ukraine
| | - Maria Kliachyna
- Enamine Ltd./Bienta, Chervonotkatska 78, 02094, Kyiv, Ukraine
| | - Iryna Pishel
- Enamine Ltd./Bienta, Chervonotkatska 78, 02094, Kyiv, Ukraine
| | - Pavel K Mykhailiuk
- Taras Shevchenko National University of Kyiv, Chemistry Department, Volodymyrska 64, 01601, Kyiv, Ukraine.,Enamine Ltd./Bienta, Chervonotkatska 78, 02094, Kyiv, Ukraine
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40
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Kou B, Zhu W, Liu H, Shen HC, Wu J, Hu T. Synthesis of Bridged Bicyclic Morpholine Amino Acids as Compact Modules for Medicinal Chemistry. CHEM LETT 2017. [DOI: 10.1246/cl.170011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Buyu Kou
- Roche Pharmaceutical Research and Early Development, Department of Medicinal Chemistry, Roche Innovation Center Shanghai, 720 Cailun Road, Building 5, Shanghai 201203, P. R. China
| | - Wei Zhu
- Roche Pharmaceutical Research and Early Development, Department of Medicinal Chemistry, Roche Innovation Center Shanghai, 720 Cailun Road, Building 5, Shanghai 201203, P. R. China
| | - Haixia Liu
- Roche Pharmaceutical Research and Early Development, Department of Medicinal Chemistry, Roche Innovation Center Shanghai, 720 Cailun Road, Building 5, Shanghai 201203, P. R. China
| | - Hong C. Shen
- Roche Pharmaceutical Research and Early Development, Department of Medicinal Chemistry, Roche Innovation Center Shanghai, 720 Cailun Road, Building 5, Shanghai 201203, P. R. China
| | - Jie Wu
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, P. R. China
| | - Taishan Hu
- Roche Pharmaceutical Research and Early Development, Department of Medicinal Chemistry, Roche Innovation Center Shanghai, 720 Cailun Road, Building 5, Shanghai 201203, P. R. China
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41
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Dobi Z, Holczbauer T, Soós T. Schreiner's Thiourea Promoted [2+2] Cycloaddition of Captodative Azetidinones and Nitroolefins. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601524] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Zoltán Dobi
- Institute of Organic Chemistry; Research Centre for Natural Sciences; Hungarian Academy of Sciences; P. O. Box 286 1519 Budapest Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry; Research Centre for Natural Sciences; Hungarian Academy of Sciences; P. O. Box 286 1519 Budapest Hungary
| | - Tibor Soós
- Institute of Organic Chemistry; Research Centre for Natural Sciences; Hungarian Academy of Sciences; P. O. Box 286 1519 Budapest Hungary
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42
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Reilly SW, Bryan NW, Mach RH. Pd-catalyzed arylation of linear and angular spirodiamine salts under aerobic conditions. Tetrahedron Lett 2017; 58:466-469. [PMID: 31762498 PMCID: PMC6874415 DOI: 10.1016/j.tetlet.2016.12.063] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Application of Buchwald-Hartwig catalysis for development of biologically relevant arylspirodiamine compounds is reported. This synthetic methodology requires no inert atmosphere and affords yields up to 93% in just 20 min. Linear and sterically hindered angular spirodiamines in salt and free-base form are coupled with electron-rich and -withdrawing aryl chlorides, demonstrating a broad scope and applicability of this protocol.
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Affiliation(s)
- Sean W. Reilly
- Department of Radiology, Perelman School of Medicine, University of Pennsylvania, 231 S. 34th Street, Philadelphia, PA 19104, USA
| | - Nikaela W. Bryan
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, 421 Curie Blvd., Philadelphia, PA 19104, USA
| | - Robert H. Mach
- Department of Radiology, Perelman School of Medicine, University of Pennsylvania, 231 S. 34th Street, Philadelphia, PA 19104, USA
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43
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Bull JA, Croft RA, Davis OA, Doran R, Morgan KF. Oxetanes: Recent Advances in Synthesis, Reactivity, and Medicinal Chemistry. Chem Rev 2016; 116:12150-12233. [DOI: 10.1021/acs.chemrev.6b00274] [Citation(s) in RCA: 241] [Impact Index Per Article: 30.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- James A. Bull
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
| | - Rosemary A. Croft
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
| | - Owen A. Davis
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
| | - Robert Doran
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
| | - Kate F. Morgan
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
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44
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Pancholi AK, Geden JV, Clarkson GJ, Shipman M. Asymmetric Synthesis of 2-Substituted Azetidin-3-ones via Metalated SAMP/RAMP Hydrazones. J Org Chem 2016; 81:7984-92. [PMID: 27447363 DOI: 10.1021/acs.joc.6b01284] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
2-Substituted azetidin-3-ones can be prepared in good yields and enantioselectivities (up to 85% ee) by a one-pot procedure involving the metalation of the SAMP/RAMP hydrazones of N-Boc-azetidin-3-one, reaction with a wide range of electrophiles, including alkyl, allyl, and benzyl halides and carbonyl compounds, followed by hydrolysis using oxalic acid.
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Affiliation(s)
- Alpa K Pancholi
- Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Joanna V Geden
- Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Guy J Clarkson
- Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Michael Shipman
- Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
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45
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Kephart SE, Zehnder LR, Huang B, Sutton SC. Synthesis of oxetane-3-carboxaldehyde and methyl oxetane-3-carboxylate via homologation of oxetane-3-one. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.03.078] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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46
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Davis OA, Croft RA, Bull JA. Synthesis of diversely functionalised 2,2-disubstituted oxetanes: fragment motifs in new chemical space. Chem Commun (Camb) 2016; 51:15446-9. [PMID: 26344367 DOI: 10.1039/c5cc05740j] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Di-, tri- and tetra-substituted oxetane derivatives with combinations of ester, amide, nitrile, aryl, sulfone and phosphonate substituents are prepared as fragments or building blocks for drug discovery. The synthesis of these novel oxetane functional groups, in new chemical space, is achieved via rhodium-catalysed O-H insertion and C-C bond forming cyclisation.
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Affiliation(s)
- Owen A Davis
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, UK.
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47
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Quinodoz P, Drouillat B, Wright K, Marrot J, Couty F. N-Arylazetidines: Preparation through Anionic Ring Closure. J Org Chem 2016; 81:2899-910. [DOI: 10.1021/acs.joc.6b00169] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pierre Quinodoz
- Institut Lavoisier de Versailles,
UMR 8180. Université de Versailles St-Quentin-en-Yvelines, Université Paris Saclay, 45, Avenue des Etats-Unis, Versailles 78035 Cedex, France
| | - Bruno Drouillat
- Institut Lavoisier de Versailles,
UMR 8180. Université de Versailles St-Quentin-en-Yvelines, Université Paris Saclay, 45, Avenue des Etats-Unis, Versailles 78035 Cedex, France
| | - Karen Wright
- Institut Lavoisier de Versailles,
UMR 8180. Université de Versailles St-Quentin-en-Yvelines, Université Paris Saclay, 45, Avenue des Etats-Unis, Versailles 78035 Cedex, France
| | - Jérôme Marrot
- Institut Lavoisier de Versailles,
UMR 8180. Université de Versailles St-Quentin-en-Yvelines, Université Paris Saclay, 45, Avenue des Etats-Unis, Versailles 78035 Cedex, France
| | - François Couty
- Institut Lavoisier de Versailles,
UMR 8180. Université de Versailles St-Quentin-en-Yvelines, Université Paris Saclay, 45, Avenue des Etats-Unis, Versailles 78035 Cedex, France
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48
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Synthesis of novel and conformationally constrained bridged amino acids as compact modules for drug discovery. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2015.12.097] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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49
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Chernykh AV, Feskov IO, Chernykh AV, Daniliuc CG, Tolmachova NA, Volochnyuk DM, Radchenko DS. Synthesis of fluorinated building blocks based on spiro[3.3]heptane scaffold. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.12.081] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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50
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Wong YC, Yeung YY. A convenient method for the synthesis of α-carboxylate ester bromolactones via bromolactonization of alkenoic diesters. Org Biomol Chem 2016; 14:3202-6. [DOI: 10.1039/c6ob00311g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A simple and efficient synthesis of α-ester bromolactones has been developed through the electrophilic bromocyclization of olefinic 1,3-diesters.
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Affiliation(s)
- Ying-Chieh Wong
- Department of Chemistry
- The Chinese University of Hong Kong
- Shatin, NT
- China
| | - Ying-Yeung Yeung
- Department of Chemistry
- The Chinese University of Hong Kong
- Shatin, NT
- China
- Department of Chemistry
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