1
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Sharma D, Rasaily S, Chettri S, Sureka D, Tamang S, Pariyar A. Stereospecific Single-Pot Route to Chiral Imidazolidines from Aziridines Using a 2D Cu Metal-Organic Framework. Inorg Chem 2023; 62:4540-4549. [PMID: 36877160 DOI: 10.1021/acs.inorgchem.2c04443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
Abstract
The role of coordinatively unsaturated sites (CUS) in metal-organic framework (MOF)-catalyzed organic transformation is vital; however, the design and generation of such sites are challenging. We, therefore, report the synthesis of a novel two-dimensional (2D) MOF, [Cu(BTC)(Mim)]n (Cu-SKU-3), with pre-existing unsaturated Lewis acid sites. The presence of these active CUS facilitates a ready-to-use attribute in Cu-SKU-3, thereby subsiding the lengthy activation processes associated with MOF-based catalysis. The material has been completely characterized using single crystal X-ray diffraction (SCXRD), powder XRD (PXRD), thermogravimetric analysis (TGA), carbon, hydrogen, and nitrogen (CHN), Fourier-transform infrared (FTIR), and Brunauer-Emmett-Teller (BET) surface area analyses. We directly utilize Cu-SKU-3 for the synthesis of biologically valued chiral imidazolidine motifs in a one-pot fashion starting from aziridines. The chiral imidazolidines are synthesized in good yield (up to 89%) and with high optical purity (ee > 98-99%). Mechanistically, the transformation proceeds in a tandem fashion through stereospecific ring-opening of aziridines followed by the intramolecular cyclization (via sp3 C-H functionalization) reaction forming chiral imidazolidines. The material has an excellent heterogeneous attribute and can be reused several times for one-pot catalytic cycles.
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Affiliation(s)
- Debesh Sharma
- Department of Chemistry, Sikkim University, Tadong, Gangtok 737102, East Sikkim, India
| | - Sagarmani Rasaily
- Department of Chemistry, Sikkim University, Tadong, Gangtok 737102, East Sikkim, India
| | - Shivanand Chettri
- Department of Chemistry, Sikkim University, Tadong, Gangtok 737102, East Sikkim, India
| | - Disha Sureka
- Department of Chemistry, Sikkim University, Tadong, Gangtok 737102, East Sikkim, India
| | - Sudarsan Tamang
- Department of Chemistry, Sikkim University, Tadong, Gangtok 737102, East Sikkim, India
| | - Anand Pariyar
- Department of Chemistry, Sikkim University, Tadong, Gangtok 737102, East Sikkim, India
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2
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Kim Y, Kim SY, Kim SG. Organocatalytic Asymmetric [3 + 2]-Annulations of γ-Sulfonamido/γ-Hydroxy-α,β-Unsaturated Ketones with Cyclic N-Sulfimines: Synthesis of Chiral Polyheterotricyclic Imidazolidines and Oxazolidines. J Org Chem 2023; 88:1113-1127. [PMID: 36580571 DOI: 10.1021/acs.joc.2c02634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The first organocatalytic asymmetric [3 + 2]-annulation of γ-sulfonamido-α,β-unsaturated ketones with cyclic N-sulfimines has been developed, and enantioenriched functionalized polyheterotricyclic imidazolidines were obtained in good yields and with excellent enantioselectivities. This approach was also extended to the asymmetric [3 + 2]-annulation of γ-hydroxy-α,β-unsaturated ketones, affording enantioenriched polyheterotricyclic oxazolidines. In addition, base-catalyzed [3 + 2]-annulations of γ-sulfonamido/γ-hydroxy-α,β-unsaturated ketones with cyclic N-sulfimines were re-investigated under mild reaction conditions for the synthesis of racemic polyheterotricyclic imidazolidines and oxazolidines with excellent diastereoselectivities.
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Affiliation(s)
- Yoseop Kim
- Department of Chemistry, College of Natural Science, Kyonggi University, 154-42 Gwanggyosan-ro, Yeongtong-gu, Suwon 16227, Republic of Korea
| | - Seung Yeon Kim
- Department of Chemistry, College of Natural Science, Kyonggi University, 154-42 Gwanggyosan-ro, Yeongtong-gu, Suwon 16227, Republic of Korea
| | - Sung-Gon Kim
- Department of Chemistry, College of Natural Science, Kyonggi University, 154-42 Gwanggyosan-ro, Yeongtong-gu, Suwon 16227, Republic of Korea
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3
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Qiao J, Wang S, Liu X, Feng X. Enantioselective [3+2] Cycloaddition of Donor-Acceptor Aziridines and Imines to Construct 2,5-trans-Imidazolidines. Chemistry 2023; 29:e202203757. [PMID: 36602265 DOI: 10.1002/chem.202203757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/02/2023] [Accepted: 01/04/2023] [Indexed: 01/06/2023]
Abstract
An enantioselective [3+2] cycloaddition of donor-acceptor aziridines with N-aryl protected imines was developed with a Ni(ClO4 )2 ⋅ 6H2 O/N,N'-dioxide catalyst system, providing a broad range of chiral trans-substituted imidazolidine compounds with good yields and excellent enantioselectivities (up to 99 % yield, up to 98 % ee). Control experiments indicated that the products could offer excellent diastereoselectivities with the control of chiral Ni(II)-N,N'-dioxide complex and the interaction of the substrates. The possible catalytic process was proposed to rationalize the stereocontrol.
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Affiliation(s)
- Jianglin Qiao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Shiyu Wang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
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4
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Tian J, Zhao L, Yang C, Yang C, Guo L, Xia W. Four-Component Synthesis of Spiro-Imidazolidines Enabled by Carbon Nitride Photocatalysis. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Jian Tian
- State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Lulu Zhao
- State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Chuan Yang
- State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Chao Yang
- State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Lin Guo
- State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Wujiong Xia
- State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
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5
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Gurung B, Pradhan S, Sharma D, Bhujel D, Basel S, Chettri S, Rasaily S, Pariyar A, Tamang S. CsPbBr 3 perovskite quantum dots as a visible light photocatalyst for cyclisation of diamines and amino alcohols: an efficient approach to synthesize imidazolidines, fused-imidazolidines and oxazolidines. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00799a] [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
We report the synthesis of highly stable CsPbBr3QD based photocatalysts using dibromoisocyanuric acid (DBI) as a benign non-toxic bromide precursor.
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Affiliation(s)
- Bikram Gurung
- Department of Chemistry, School of Physical Sciences, Sikkim University, Sikkim 737102, India
| | - Sajan Pradhan
- Department of Chemistry, School of Physical Sciences, Sikkim University, Sikkim 737102, India
| | - Debesh Sharma
- Department of Chemistry, School of Physical Sciences, Sikkim University, Sikkim 737102, India
| | - Deshaj Bhujel
- Department of Chemistry, School of Physical Sciences, Sikkim University, Sikkim 737102, India
| | - Siddhant Basel
- Department of Chemistry, School of Physical Sciences, Sikkim University, Sikkim 737102, India
| | - Shivanand Chettri
- Department of Chemistry, School of Physical Sciences, Sikkim University, Sikkim 737102, India
| | - Sagarmani Rasaily
- Department of Chemistry, School of Physical Sciences, Sikkim University, Sikkim 737102, India
| | - Anand Pariyar
- Department of Chemistry, School of Physical Sciences, Sikkim University, Sikkim 737102, India
| | - Sudarsan Tamang
- Department of Chemistry, School of Physical Sciences, Sikkim University, Sikkim 737102, India
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6
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Shi Z, Fan T, Zhang X, Zhan F, Wang Z, Zhao L, Lin J, Jiang Y. Synthesis of Diversely Substituted Imidazolidines
via
[3+2] Cycloaddition of 1,3,5‐Triazinanes with Donor‐Acceptor Aziridines and Their Anti‐Tumor Activity. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001569] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Zhichao Shi
- Department of Chemistry Tsinghua University Beijing 100084 People's Republic of China
- The State Key Laboratory of Chemical Oncogenomics Key Laboratory of Chemical Biology Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 People's Republic of China
| | - Tingting Fan
- The State Key Laboratory of Chemical Oncogenomics Key Laboratory of Chemical Biology Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 People's Republic of China
- Department of Chemistry Southern University of Science and Technology Shenzhen 518055 People's Republic of China
- Shenzhen Bay Laboratory Shenzhen 518055 People's Republic of China
| | - Xun Zhang
- Department of Chemistry Tsinghua University Beijing 100084 People's Republic of China
- The State Key Laboratory of Chemical Oncogenomics Key Laboratory of Chemical Biology Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 People's Republic of China
| | - Feng Zhan
- Department of Chemistry Tsinghua University Beijing 100084 People's Republic of China
- The State Key Laboratory of Chemical Oncogenomics Key Laboratory of Chemical Biology Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 People's Republic of China
| | - Zhe Wang
- Department of Chemistry Tsinghua University Beijing 100084 People's Republic of China
- The State Key Laboratory of Chemical Oncogenomics Key Laboratory of Chemical Biology Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 People's Republic of China
| | - Lei Zhao
- Department of Chemistry Tsinghua University Beijing 100084 People's Republic of China
- The State Key Laboratory of Chemical Oncogenomics Key Laboratory of Chemical Biology Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 People's Republic of China
| | - Jin‐Shun Lin
- Department of Chemistry Tsinghua University Beijing 100084 People's Republic of China
- The State Key Laboratory of Chemical Oncogenomics Key Laboratory of Chemical Biology Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 People's Republic of China
| | - Yuyang Jiang
- Department of Chemistry Tsinghua University Beijing 100084 People's Republic of China
- The State Key Laboratory of Chemical Oncogenomics Key Laboratory of Chemical Biology Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 People's Republic of China
- Department of Chemistry Southern University of Science and Technology Shenzhen 518055 People's Republic of China
- Shenzhen Bay Laboratory Shenzhen 518055 People's Republic of China
- School of Pharmaceutical Sciences Tsinghua University Beijing 100084 People's Republic of China
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7
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Aneeja T, Radhika S, Neetha M, Anilkumar G. An Overview of the One-pot Synthesis of Imidazolines. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999201001153735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
One-pot syntheses are a simple, efficient and easy methodology, which are widely
used for the synthesis of organic compounds. Imidazoline is a valuable heterocyclic moiety
used as a synthetic intermediate, chiral auxiliary, chiral catalyst and a ligand for asymmetric
catalysis. Imidazole is a fundamental unit of biomolecules that can be easily prepared from
imidazolines. The one-pot method is an impressive approach to synthesize organic compounds
as it minimizes the reaction time, separation procedures, and ecological impact. Many significant
one-pot methods such as N-bromosuccinimide mediated reaction, ring-opening of tetrahydrofuran,
triflic anhydrate mediated reaction, etc. were reported for imidazoline synthesis.
This review describes an overview of the one-pot synthesis of imidazolines and covers literature
up to 2020.
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Affiliation(s)
- Thaipparambil Aneeja
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills P.O., Kottayam, Kerala, 686560, India
| | - Sankaran Radhika
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills P.O., Kottayam, Kerala, 686560, India
| | - Mohan Neetha
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills P.O., Kottayam, Kerala, 686560, India
| | - Gopinathan Anilkumar
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills P.O., Kottayam, Kerala, 686560, India
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8
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Tarannum S, Sk S, Das S, Wani IA, Ghorai MK. Stereoselective Syntheses of Highly Functionalized Imidazolidines and Oxazolidines via Ring-Opening Cyclization of Activated Aziridines and Epoxides with Amines and Aldehydes. J Org Chem 2020; 85:367-379. [PMID: 31782305 DOI: 10.1021/acs.joc.9b02278] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A mild one-pot stereospecific synthetic route to highly functionalized imidazolidines and oxazolidines via SN2-type ring-opening of the corresponding activated aziridines and epoxides with amines followed by p-toluenesulfonic acid (PTSA)-catalyzed intramolecular cyclization with aldehydes has been developed. The methodology tolerates a variety of functional groups and furnishes the desired products in high yields (up to 92%) with excellent stereoselectivities (de, ee > 99%). Interestingly, imidazolidines were formed as the cis-isomers, whereas oxazolidines were produced as trans-isomers exclusively.
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Affiliation(s)
- Saima Tarannum
- Department of Chemistry , Indian Institute of Technology , 208016 Kanpur , Uttar Pradesh , India
| | - Sahid Sk
- Department of Chemistry , Indian Institute of Technology , 208016 Kanpur , Uttar Pradesh , India
| | - Subhomoy Das
- Department of Chemistry , Indian Institute of Technology , 208016 Kanpur , Uttar Pradesh , India
| | - Imtiyaz Ahmad Wani
- Department of Chemistry , Indian Institute of Technology , 208016 Kanpur , Uttar Pradesh , India
| | - Manas K Ghorai
- Department of Chemistry , Indian Institute of Technology , 208016 Kanpur , Uttar Pradesh , India
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9
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Three-component hetero-domino cyclization and copper-catalyzed double A3-coupling reaction of ethane-1,2-diamines, formaldehyde, and alkynes to afford 1,3-dipropargylimidazolidines. Chem Heterocycl Compd (N Y) 2018. [DOI: 10.1007/s10593-018-2273-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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10
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Khan HPA, Chakraborty TK. Diversity-Oriented Approach to N-Heterocyclic Compounds from α-Phenyl-β-enamino Ester via a Mitsunobu-Michael Reaction Sequence. J Org Chem 2018; 83:2027-2039. [PMID: 29334224 DOI: 10.1021/acs.joc.7b02962] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein we delineate a novel route for the diastereoselective construction of diversely substituted N-heterocyclic ring systems as valuable scaffolds for natural products and pharmaceuticals, starting from an easily accessible prochiral α-phenyl-β-enamino ester. The reaction sequence relies on the unexplored reactivity of α-phenyl-β-enamino ester as a nucleophilic partner in the Mitsunobu reaction to forge the N-tethered alkene-alcohol/thiol/amine intermediate, which was subjected to an intramolecular hetero-Michael addition reaction under mild conditions to furnish the respective N-heterocyclic compounds embedded with an exocyclic chiral center in high yields and excellent diastereoselectivities. The methodology is amenable for a broad range of substrates based on a metal-free approach.
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Affiliation(s)
- Hina P A Khan
- Department of Organic Chemistry, Indian Institute of Science , Bengaluru 560012, India
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11
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Li H, Huang S, Wang Y, Huo C. Oxidative Dehydrogenative [2 + 3]-Cyclization of Glycine Esters with Aziridines Leading to Imidazolidines. Org Lett 2017; 20:92-95. [DOI: 10.1021/acs.orglett.7b03448] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Haitao Li
- Key Laboratory of Eco-Environment-Related
Polymer Materials of Ministry of Education, College of Chemistry and
Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Songhai Huang
- Key Laboratory of Eco-Environment-Related
Polymer Materials of Ministry of Education, College of Chemistry and
Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Yajun Wang
- Key Laboratory of Eco-Environment-Related
Polymer Materials of Ministry of Education, College of Chemistry and
Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Congde Huo
- Key Laboratory of Eco-Environment-Related
Polymer Materials of Ministry of Education, College of Chemistry and
Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
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12
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Wei Q, Wei MJ, Ou YJ, Zhang JY, Huang X, Cai YP, Si LP. Formation and conversion of six temperature-dependent fluorescent Zn II-complexes containing two in situ formed N-rich heterocyclic ligands. RSC Adv 2017. [DOI: 10.1039/c6ra25678c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Formation and conversion of six temperature-dependent fluorescent ZnII-complexes containing two solvothermal in situ formed N-rich heterocyclic ligands from simply N3 set Schiff base were systematically studied for the first time.
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Affiliation(s)
- Qin Wei
- School of Chemistry and Environment
- South China Normal University
- P. R. China
| | - Mei-Juan Wei
- School of Chemistry and Environment
- South China Normal University
- P. R. China
| | - Yan-Jun Ou
- School of Chemistry and Environment
- South China Normal University
- P. R. China
| | - Ji-Yuan Zhang
- Guangzhou Institute of Energy Conversion
- Chinese Academy of Sciences
- Guangzhou 510640
- P. R. China
| | - Xia Huang
- School of Chemistry and Environment
- South China Normal University
- P. R. China
| | - Yue-Peng Cai
- School of Chemistry and Environment
- South China Normal University
- P. R. China
- Guangzhou Key Laboratory of Materials for Energy Conversion and Storage
- Guangzhou 510006
| | - Li-Ping Si
- School of Chemistry and Environment
- South China Normal University
- P. R. China
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13
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Sengoden M, Bhowmick A, Punniyamurthy T. Stereospecific Copper-Catalyzed Domino Ring Opening and sp3 C–H Functionalization of Activated Aziridines with N-Alkylanilines. Org Lett 2016; 19:158-161. [DOI: 10.1021/acs.orglett.6b03458] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mani Sengoden
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Abhisikta Bhowmick
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
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14
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Satheesh V, Sengoden M, Punniyamurthy T. “On Water” C(sp3)–H Functionalization/C–O/C–N Bonds Formations: Synthesis of Functionalized Oxazolidines and Imidazolidines. J Org Chem 2016; 81:9792-9801. [DOI: 10.1021/acs.joc.6b01850] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vanaparthi Satheesh
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Mani Sengoden
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
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15
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Balaji PV, Chandrasekaran S. Stereoselective Anti-Markovnikov Geminal Diamination and Dioxygenation of Vinylarenes Mediated by the Bromonium Ion. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600203] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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16
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Swain SP, Shih YC, Tsay SC, Jacob J, Lin CC, Hwang KC, Horng JC, Hwu JR. Aryne-Induced Novel Tandem 1,2-Addition/(3+2) Cycloaddition to Generate Imidazolidines and Pyrrolidines. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503319] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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17
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Swain SP, Shih Y, Tsay S, Jacob J, Lin C, Hwang KC, Horng J, Hwu JR. Aryne‐Induced Novel Tandem 1,2‐Addition/(3+2) Cycloaddition to Generate Imidazolidines and Pyrrolidines. Angew Chem Int Ed Engl 2015; 54:9926-30. [DOI: 10.1002/anie.201503319] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Indexed: 02/03/2023]
Affiliation(s)
- Sharada P. Swain
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013 (Taiwan)
| | - Yi‐Chun Shih
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013 (Taiwan)
| | - Shwu‐Chen Tsay
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013 (Taiwan)
- Department of Chemistry, National Central University, Jhongli City 32001 (Taiwan)
| | - Joby Jacob
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013 (Taiwan)
| | - Chun‐Cheng Lin
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013 (Taiwan)
| | - Kuo Chu Hwang
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013 (Taiwan)
| | - Jia‐Cherng Horng
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013 (Taiwan)
| | - Jih Ru Hwu
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013 (Taiwan)
- Department of Chemistry, National Central University, Jhongli City 32001 (Taiwan)
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18
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A novel atom-economic synthesis of functionalized imidazolidines through copper(I)-catalyzed domino three-component coupling and cyclization reactions. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.03.063] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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Kaladevi S, Paul N, Muthusubramanian S, Sivakolunthu S. Synthesis of unsymmetrical (1,3-diarylimidazolidin-4-yl) (aryl)methanone via Mannich reaction. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.05.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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20
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Tian Q, Cheng Z, Yajima HM, Savage SJ, Green KL, Humphries T, Reynolds ME, Babu S, Gosselin F, Askin D, Kurimoto I, Hirata N, Iwasaki M, Shimasaki Y, Miki T. A Practical Synthesis of a PI3K Inhibitor under Noncryogenic Conditions via Functionalization of a Lithium Triarylmagnesiate Intermediate. Org Process Res Dev 2013. [DOI: 10.1021/op3002992] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Qingping Tian
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - Zhigang Cheng
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - Herbert M. Yajima
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - Scott J. Savage
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - Keena L. Green
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - Theresa Humphries
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - Mark E. Reynolds
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - Srinivasan Babu
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - Francis Gosselin
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - David Askin
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - Isao Kurimoto
- Health & Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd., 3 Utajima, Nishiyodogawa-ku, Osaka 555-0021, Japan
| | - Norihiko Hirata
- Health & Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd., 3 Utajima, Nishiyodogawa-ku, Osaka 555-0021, Japan
| | - Mitsuhiro Iwasaki
- Health & Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd., 3 Utajima, Nishiyodogawa-ku, Osaka 555-0021, Japan
| | - Yasuharu Shimasaki
- Health & Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd., 3 Utajima, Nishiyodogawa-ku, Osaka 555-0021, Japan
| | - Takashi Miki
- Health & Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd., 3 Utajima, Nishiyodogawa-ku, Osaka 555-0021, Japan
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21
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Sun S, Ren ZG, Yang JH, He RT, Wang F, Wu XY, Gong WJ, Li HX, Lang JP. Formation of N-heterocyclic diphosphine ligands from Ag(i)-assisted condensation reactions between bdppeda and formaldehyde and their binuclear silver(i) complexes. Dalton Trans 2012; 41:8447-54. [DOI: 10.1039/c2dt30860f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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22
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Katritzky AR, Rachwal S. Synthesis of heterocycles mediated by benzotriazole. 2. Bicyclic systems. Chem Rev 2011; 111:7063-120. [PMID: 21894899 DOI: 10.1021/cr200031r] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alan R Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, 32611-7200, United States.
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23
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Katritzky AR, Rachwal S. Synthesis of Heterocycles Mediated by Benzotriazole. 1. Monocyclic Systems. Chem Rev 2009; 110:1564-610. [DOI: 10.1021/cr900204u] [Citation(s) in RCA: 167] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alan R. Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200
| | - Stanislaw Rachwal
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200
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24
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Copper(II) promoted imidazolidine ring formation and complexation: A unique reaction course. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2007.10.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Abstract
Rapid progress in the synthetic application of benzotriazole derivatives in the last 20 years has resulted in over 1000 scientific papers on the subject. This fact is reflected in Section 5.01.7, which involves almost a half of the volume of this chapter. The section is arranged according to hybridization of the C-α atom and atomic numbers of the atoms in positions β and γ to allow an easy access to the material of interest. Recent discovery of copper catalysis in [3+2] cycloadditions of azides to acetylenes, the so-called ‘click chemistry’, which boosted application of the 1,2,3-triazole derivatives, especially in medicinal chemistry, is presented in Section 5.01.9. From the point of view of practical applications, Section 5.01.11 is organized according to the number, position, and combination of the substituents at the aromatic rings. Another novel feature that has no precedence in the previous editions of Comprehensive Heterocyclic Chemistry is an addition of triazole and benzotriazole complexes with various transitions metals to Section 5.01.4.
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26
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Ghandi M, Olyaei A, Salimi F. Four‐Component Cyclocondensation of Aminodiazines, Glyoxal, Formaldehyde, and Methanol to Imidazolidines. SYNTHETIC COMMUN 2007. [DOI: 10.1080/00397910601033450] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Mehdi Ghandi
- a School of Chemistry, University College of Science, University of Tehran , Tehran, Iran
| | - Abolfazl Olyaei
- a School of Chemistry, University College of Science, University of Tehran , Tehran, Iran
| | - Farshid Salimi
- a School of Chemistry, University College of Science, University of Tehran , Tehran, Iran
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27
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Zhu Z, Wang J, Zhang Z, Xiang X, Zhou X. Metallic Dysprosium Induced Silyl Radical Reactions: Intermolecular Cyclization and Reduction of Alkynes and Imines. Organometallics 2007. [DOI: 10.1021/om070148s] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhenyu Zhu
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Material, Fudan University, Shanghai 200433, People's Republic of China, and State Key Laboratory of Organometallic Chemistry, Shanghai 200032, People's Republic of China
| | - Jialiang Wang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Material, Fudan University, Shanghai 200433, People's Republic of China, and State Key Laboratory of Organometallic Chemistry, Shanghai 200032, People's Republic of China
| | - Zhengxing Zhang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Material, Fudan University, Shanghai 200433, People's Republic of China, and State Key Laboratory of Organometallic Chemistry, Shanghai 200032, People's Republic of China
| | - Xu Xiang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Material, Fudan University, Shanghai 200433, People's Republic of China, and State Key Laboratory of Organometallic Chemistry, Shanghai 200032, People's Republic of China
| | - Xigeng Zhou
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Material, Fudan University, Shanghai 200433, People's Republic of China, and State Key Laboratory of Organometallic Chemistry, Shanghai 200032, People's Republic of China
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28
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Chaudhary P, Nimesh S, Yadav V, Verma AK, Kumar R. Synthesis, characterization and in vitro biological studies of novel cyano derivatives of N-alkyl and N-aryl piperazine. Eur J Med Chem 2007; 42:471-6. [PMID: 17140705 DOI: 10.1016/j.ejmech.2006.10.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2006] [Revised: 10/13/2006] [Accepted: 10/19/2006] [Indexed: 10/23/2022]
Abstract
Cyano derivatives of N-alkyl and N-aryl piperazine have been synthesized and screened for antibacterial and antifungal activities. All the synthesized compounds showed the antibacterial activity against pathogenic strains of Staphylococcus aureus (MTCCB 737), Pseudomonas aeruginosa (MTCCB 741), Streptomyces epidermidis (MTCCB 1824) and Escherichia coli (MTCCB 1652) and antifungal activity against pathogenic strains of Aspergillus fumigatus (ITCC 4517), Aspergillus flavus (ITCC 5192) and Aspergillus niger (ITCC 5405). All compounds showed mild to moderate antimicrobial activity. However, compounds 3c, 4a and 6 showed potent antibacterial activity against pathogenic strains used in the study. Compounds 3a, 3b, 4b, and 4d showed mild to moderate antifungal activity against Aspergillus pathogenic strains. The compounds reported in this study were assessed for there cytotoxicity using MTT colorimetric assay on Hela cells. All the compounds showed cell viability more than the control drug gentamicin, with compound 2 having highest i.e. 95% cell viability.
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Affiliation(s)
- Preeti Chaudhary
- Dr. B.R. Ambedkar Center for Biomedical Research, University of Delhi, Mall Road, Delhi-110007, India
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29
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Synthesis of new unsymmetrical 4,5-dihydroxy-2-imidazolidinones. Dynamic NMR spectroscopic study of the prototropic tautomerism in 1-(2-benzimidazolyl)-3-phenyl-4,5-dihydroxy-2-imidazolidinone. Molecules 2006; 11:768-75. [PMID: 17971753 DOI: 10.3390/11100768] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2006] [Revised: 10/11/2006] [Accepted: 10/12/2006] [Indexed: 11/16/2022] Open
Abstract
The acid-catalyzed cyclocondensation in refluxing acetonitrile of aqueous glyoxal with N-heteroaryl-N'-phenylureas 4a-f (heteroaryl = 2-thiazolyl, 2-pyrimidinyl,2-pyrazinyl, 2-pyridinyl, 3-pyridinyl and 2-benzimidazolyl) led to the formation of the corresponding 1-heteroaryl-3-phenyl-4,5-dihydroxy-2-imidazolidinones 5a-f. All the products were characterized by elemental and spectroscopic analyses. The free-energy barrier (Delta G not equal) for prototropic tautomerism in 1-(2-benzimidazolyl)-3-phenyl-4,5-dihydroxy-2-imidazolidinone (5f) was determined by dynamic NMR studies to be 81 +/- 2 KJ mol(-1).
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30
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Novel reaction of N,N'-bisarylmethanediamines with formaldehyde. Synthesis of some new 1,3,5-triaryl-1,3,5-hexahydrotriazines. Molecules 2006; 11:556-63. [PMID: 17971727 DOI: 10.3390/11070556] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2006] [Revised: 07/22/2006] [Accepted: 07/24/2006] [Indexed: 11/17/2022] Open
Abstract
The acid-catalyzed cyclocondensation of N,N'-bisaryl (aryl = 2-pyrimidinyl, 2-pyrazinyl and 4-nitrophenyl) methanediamines 5a-c with aqueous formaldehyde in refluxing acetonitrile leads to the formation of the corresponding 1,3,5-triaryl-1,3,5-hexa-hydrotriazines 6a-c. The stoichiometric reactions of 2-aminopyrimidine and 2-amino-pyrazine with aqueous formaldehyde in acetonitrile under reflux conditions also afforded 6a and 6b, respectively. Treatment of 2-aminopyrimidine with aqueous formaldehyde in a 3:2 ratio yielded N,N',N"-tris(2-pyrimidinyl)dimethylenetriamine (7a) as a sole product, which upon subsequent reaction with formaldehyde also afforded 6a. The reaction of N,N'-biphenylmethanediamine with formaldehyde was also investigated.
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31
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Chaudhary P, Kumar R, Verma AK, Singh D, Yadav V, Chhillar AK, Sharma GL, Chandra R. Synthesis and antimicrobial activity of N-alkyl and N-aryl piperazine derivatives. Bioorg Med Chem 2006; 14:1819-26. [PMID: 16289939 DOI: 10.1016/j.bmc.2005.10.032] [Citation(s) in RCA: 129] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2005] [Revised: 10/19/2005] [Accepted: 10/20/2005] [Indexed: 11/23/2022]
Abstract
A series of substituted piperazine derivatives have been synthesized and tested for antimicrobial activity. The antibacterial activity was tested against Staphylococcus aureus (MTCCB 737), Pseudomonas aeruginosa (MTCCB 741), Streptomyces epidermidis (MTCCB 1824) and Escherichia coli (MTCCB 1652), and antifungal activity against Aspergillus fumigatus, Aspergillus flavus and Aspergillus niger. All synthesized compounds showed significant activity against bacterial strains but were found to be less active against tested fungi. In vitro toxicity tests demonstrated that compounds 4d and 6a showed very less toxicity against human erythrocytes.
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Affiliation(s)
- Preeti Chaudhary
- Synthetic Organic Chemistry Research Laboratory, Dr.B. R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi 110007, India
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32
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Skene WG, Berl V, Risler H, Khoury R, Lehn JM. Selective product amplification of thymine photodimer by recognition-directed supramolecular assistance. Org Biomol Chem 2006; 4:3652-63. [PMID: 16990941 DOI: 10.1039/b605658j] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two symmetric ditopic supramolecular templates (1 and 2) each presenting two hydrogen bonding recognition subunits were synthesized. Each such subunit comprises the same donor and acceptor pattern, capable of binding a substrate molecule with complementary hydrogen bonding groups to form a supramolecular complex. Substrate molecules, such as thymine or uracil derivatives, yield 2 : 1 complexes with the acceptors involving two hydrogen bonds to each subunit with ideal orientation for subsequent [2 + 2] dimerization upon photoirradiation. Selective syn photoproduct formation and concomitant suppression of the trans isomer are favored by orientation of the two guest nucleobases within the template cleft. Complementary donor and acceptor hydrogen bonding induced positioning of the two substrates and steric hindrance within the template clefts are responsible for the selective product formation.
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Affiliation(s)
- W G Skene
- Laboratoire de Chimie Supramoléculaire, ISIS-Université Louis Pasteur, 8, allée Gaspard Monge, BP 70028, 67083, Strasbourg cedex, France
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33
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Katritzky AR, Manju K, Singh SK, Meher NK. Benzotriazole mediated amino-, amido-, alkoxy- and alkylthio-alkylation. Tetrahedron 2005. [DOI: 10.1016/j.tet.2004.12.018] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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34
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Katritzky AR, Yang H, Singh SK. Preparation of Tertiary Alkyl Carbinamines, Propargylamines, and α-Heteroarylamines by Ketone-Based Aminoalkylation. J Org Chem 2004; 70:286-90. [PMID: 15624934 DOI: 10.1021/jo048541k] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ketones 6a-i were converted into their benzotriazolylamine adducts 8a-i either directly from the corresponding ketone 6a or via enamines 7b-i. Adducts 8a-i on treatment with Grignard reagents, lithium phenylacetylide, or heteroaryllithiums gave tertiary alkyl carbinamines 9a-h (47-61%), propargylamines 10a-i (30-98%), and alpha-heteroarylamines 11a-k (44-85%), respectively.
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Affiliation(s)
- Alan R Katritzky
- Center for Heterocyclic Compounds, University of Florida, Department of Chemistry, Gainesville, Florida 32611-7200, USA.
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35
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Rivera A, Maldonado M, Nüñez ME, Joseph-Nathan P. NUCLEOPHILIC SUBSTITUTION AT THE AMINALIC CARBON OF SOME MACROCYCLIC POLYAMINALS. HETEROCYCL COMMUN 2004. [DOI: 10.1515/hc.2004.10.1.77] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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36
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Clavier H, Boulanger L, Audic N, Toupet L, Mauduit M, Guillemin JC. Design and synthesis of imidazolinium salts derived from (l)-valine. Investigation of their potential in chiral molecular recognition. Chem Commun (Camb) 2004. [DOI: 10.1039/b402368d] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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37
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Katritzky AR, Verma AK, He HY, Chandra R. Novel Synthesis of 1,2,3,4-Tetrahydropyrazino[1,2-a]indoles. J Org Chem 2003; 68:4938-40. [PMID: 12790604 DOI: 10.1021/jo026922x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Condensation of 2-(3-methyl-1H-indol-1-yl)ethylamine (7) with benzotriazole and formaldehyde gave 2-(1H-1,2,3-benzotriazol-1-ylmethyl)-10-methyl-1,2,3,4-tetrahydropyrazino[1,2-a]indole (8) in 96% yield. Nucleophilic substitutions of the benzotriazolyl group in 8 with NaBH(4), NaCN, triethyl phosphite, allylsilanes, silyl enol ether and Grignard reagents afforded novel 10-methyl-1,2,3,4-tetrahydropyrazino[1,2-a]indoles 9a-i in 78-95% yields.
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Affiliation(s)
- Alan R Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611-7200, USA.
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38
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Zhao J, Pattaropong V, Jiang Y, Hu L. Facile synthesis and cleavage of imidazolidines in a novel protection strategy for the preparation of peptides containing a reduced amide bioisostere. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(02)02562-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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39
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Chapter 5.4 Five membered ring systems: With more than one N atom. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0959-6380(03)80011-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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40
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Katritzky AR, Suzuki K, He HY. Novel syntheses of enantiopure hexahydroimidazo[1,5-b]isoquinolines and tetrahydroimidazo[1,5-b]isoquinolin-1(5H)-ones via iminium cation cyclizations. J Org Chem 2002; 67:8224-9. [PMID: 12423156 DOI: 10.1021/jo0203241] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Condensations of chiral diamines 11a-c with benzotriazole and formaldehyde gave benzotriazolyl intermediates 12a-c; similar condensations of alpha-amino-amides 10a-c with benzotriazole and paraformaldehyde gave 14a-c. Subsequent treatment of 12a-c and 14a-c with AlCl(3) led to enantiopure tricyclic 1,2,3,5,10,10a-hexahydroimidazo[1,5-b]isoquinolines 1a-c and 2,3,10,10a-tetrahydroimidazo[1,5-b]isoquinolin-1(5H)-ones 15a-c, respectively, via Lewis acid promoted iminium cation cyclizations.
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Affiliation(s)
- Alan R Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA.
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