1
|
Fuchibe K, Ichikawa J. Generation of difluorocarbenes and introduction of fluorinated one carbon units into carbonyl and related compounds. Chem Commun (Camb) 2023; 59:2532-2540. [PMID: 36723345 DOI: 10.1039/d2cc03950h] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Difluorocarbene is a simple and versatile one-carbon unit for synthesizing acyclic and cyclic organofluorine compounds. However, the use of difluorocarbene in organic synthesis has been relatively limited because of the harsh conditions required for its generation, the toxicity of the precursors, and undesired dimerization. This feature article provides an account of (i) the generation of free and metal difluorocarbenes from trimethylsilyl 2,2-difluoro-2-(fluorosulfonyl)acetate (TFDA) or BrCF2CO2Li/Na and (ii) their application to the facile synthesis of valuable organofluorine compounds. The difluorocarbenes thus generated react with (thio)carbonyl compounds and silyl dienol ethers to provide a wide variety of products such as (a) difluoromethyl (thio)ethers, (b) fluorinated thiophenes, (c) fluorinated thia/oxazoles, (d) fluorinated cyclopentanones and (e) difluoroalkenes.
Collapse
Affiliation(s)
- Kohei Fuchibe
- Division of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
| | - Junji Ichikawa
- Division of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
| |
Collapse
|
2
|
Mailyan AK, Mata G, Miles DH, Sharif EU, Leleti MR, Powers JP, Jeffrey JL. Development of a Robust and Scalable Synthetic Route for a Potent and Selective Isoindolinone PI3Kγ Inhibitor. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.2c00240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Artur K. Mailyan
- Arcus Biosciences Inc., 3928 Point Eden Way, Hayward, California 94545, United States
| | - Guillaume Mata
- Arcus Biosciences Inc., 3928 Point Eden Way, Hayward, California 94545, United States
| | - Dillon H. Miles
- Arcus Biosciences Inc., 3928 Point Eden Way, Hayward, California 94545, United States
| | - Ehesan U. Sharif
- Arcus Biosciences Inc., 3928 Point Eden Way, Hayward, California 94545, United States
| | - Manmohan R. Leleti
- Arcus Biosciences Inc., 3928 Point Eden Way, Hayward, California 94545, United States
| | - Jay P. Powers
- Arcus Biosciences Inc., 3928 Point Eden Way, Hayward, California 94545, United States
| | - Jenna L. Jeffrey
- Arcus Biosciences Inc., 3928 Point Eden Way, Hayward, California 94545, United States
| |
Collapse
|
3
|
Loison A, Toulgoat F, Billard T, Hanquet G, Panossian A, Leroux FR. Recent synthetic methods towards the –OCHF2 moiety. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132458] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
4
|
Tracy JS, Kalnmals CA, Toste FD. Beyond Allylic Alkylation: Applications of Trost Chemistry in Complex Molecule Synthesis. Isr J Chem 2021. [DOI: 10.1002/ijch.202000103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jacob S. Tracy
- Dept. of Chemistry University of California, Berkeley MC 1460 Berkeley CA 94720 USA
| | | | - F. Dean Toste
- Dept. of Chemistry University of California, Berkeley MC 1460 Berkeley CA 94720 USA
| |
Collapse
|
5
|
Affiliation(s)
- Cheng-yi Chen
- Janssen R&D, API Small Molecule Development, Discovery Product Development & Supply, Hochstrasse 201, 8205 Schaffhausen, Switzerland
| | - Xiaowei Lu
- Porton (Shanghai) R&D Center, 1299 Ziyue Road, Zizhu Science Park, Minhang District, Shanghai 200241, China
| |
Collapse
|
6
|
Balasubramanian G, Narayanan S, Andiappan L, Sappanimuthu T, Thirunavukkarasu S, Sundaram S, Natarajan S, Sivaraman N, Rajagopal S, Nazumudeen FAA, Saxena S, Vishwakarma SL, Narayanan S, Sharma GVR, Srinivasan CV, Kilambi N. In vivo effective dibenzo[b,d]furan-1-yl-thiazoles as novel PDE-4 inhibitors. Bioorg Med Chem 2016; 24:5702-5716. [PMID: 27713015 DOI: 10.1016/j.bmc.2016.09.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 09/07/2016] [Indexed: 10/21/2022]
Abstract
Herein we report the synthesis, PDE-4B and TNF-α inhibitory activities of a few dibenzo[b,d]furan-1-yl-thiazole derivatives. The hydroxycyclohexanol amide derivatives 14, 18, 24, 29, 31 and 33 exhibited promising in vitro PDE-4B and TNF-α inhibitory activities. Compound 24 showed good systemic availability in preclinical animal models and was also found to be non-toxic (exploratory mutagenicity test). Further it exhibited promising results in in vivo asthma/COPD and Uveitis models.
Collapse
Affiliation(s)
- Gopalan Balasubramanian
- Department of Medicinal Chemistry, Drug Discovery Research, Orchid Pharma Ltd, Chennai 600119, India
| | - Sukunath Narayanan
- Department of Medicinal Chemistry, Drug Discovery Research, Orchid Pharma Ltd, Chennai 600119, India
| | - Lavanya Andiappan
- Department of Medicinal Chemistry, Drug Discovery Research, Orchid Pharma Ltd, Chennai 600119, India
| | | | | | - Shamundeeswari Sundaram
- Department of Medicinal Chemistry, Drug Discovery Research, Orchid Pharma Ltd, Chennai 600119, India
| | - Saravanakumar Natarajan
- Department of Medicinal Chemistry, Drug Discovery Research, Orchid Pharma Ltd, Chennai 600119, India
| | - Naresh Sivaraman
- Department of Medicinal Chemistry, Drug Discovery Research, Orchid Pharma Ltd, Chennai 600119, India
| | - Sridharan Rajagopal
- Department of Medicinal Chemistry, Drug Discovery Research, Orchid Pharma Ltd, Chennai 600119, India
| | | | - Sanjeev Saxena
- Department of Biology, Drug Discovery Research, Orchid Pharma Ltd, Chennai 600119, India
| | - Santosh L Vishwakarma
- Department of Biology, Drug Discovery Research, Orchid Pharma Ltd, Chennai 600119, India
| | - Shridhar Narayanan
- Department of Biology, Drug Discovery Research, Orchid Pharma Ltd, Chennai 600119, India
| | - Ganapavarapu V R Sharma
- Department of Medicinal Chemistry, Drug Discovery Research, Orchid Pharma Ltd, Chennai 600119, India
| | - Chidambaram V Srinivasan
- Department of Medicinal Chemistry, Drug Discovery Research, Orchid Pharma Ltd, Chennai 600119, India
| | - Narasimhan Kilambi
- Department of Medicinal Chemistry, Drug Discovery Research, Orchid Pharma Ltd, Chennai 600119, India.
| |
Collapse
|
7
|
Llaveria J, Leonori D, Aggarwal VK. Stereospecific Coupling of Boronic Esters with N-Heteroaromatic Compounds. J Am Chem Soc 2015; 137:10958-61. [PMID: 26292943 DOI: 10.1021/jacs.5b07842] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A protocol for the stereospecific coupling of chiral secondary and tertiary boronic esters with lithiated N-heteroaromatics is described. The process involves initial boronate complex formation followed by addition of Troc-Cl, which activates the nitrogen and induces 1,2-migration. Oxidative workup furnishes the coupled product with >98% es.
Collapse
Affiliation(s)
- Josep Llaveria
- School of Chemistry, University of Bristol , Cantock's Close, Bristol BS8 1TS, U.K
| | - Daniele Leonori
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, U.K
| | - Varinder K Aggarwal
- School of Chemistry, University of Bristol , Cantock's Close, Bristol BS8 1TS, U.K
| |
Collapse
|
8
|
Williams SJ, Zammit SC, Cox AJ, Shackleford DM, Morizzi J, Zhang Y, Powell AK, Gilbert RE, Krum H, Kelly DJ. 3′,4′-Bis-difluoromethoxycinnamoylanthranilate (FT061): An orally-active antifibrotic agent that reduces albuminuria in a rat model of progressive diabetic nephropathy. Bioorg Med Chem Lett 2013; 23:6868-73. [DOI: 10.1016/j.bmcl.2013.09.100] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 09/30/2013] [Indexed: 12/14/2022]
|
9
|
Chen JL, Chu L, Qing FL. Total synthesis of the trifluoromethylated analog of isoaltholactone: 5-trifluoromethylisoaltholactone. J Fluor Chem 2013. [DOI: 10.1016/j.jfluchem.2013.01.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
10
|
Besset T, Gramage-Doria R, Reek JNH. Remotely Controlled Iridium-Catalyzed Asymmetric Hydrogenation of Terminal 1,1-Diaryl Alkenes. Angew Chem Int Ed Engl 2013; 52:8795-7. [DOI: 10.1002/anie.201302942] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Indexed: 11/09/2022]
|
11
|
Besset T, Gramage-Doria R, Reek JNH. Ferngesteuerte iridiumkatalysierte asymmetrische Hydrierung von terminalen 1,1-Diarylalkenen. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201302942] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
12
|
Sifferlen T, Koberstein R, Cottreel E, Boller A, Weller T, Gatfield J, Brisbare-Roch C, Jenck F, Boss C. Structure-activity relationship studies and sleep-promoting activity of novel 1-chloro-5,6,7,8-tetrahydroimidazo[1,5-a]pyrazine derivatives as dual orexin receptor antagonists. Part 2. Bioorg Med Chem Lett 2013; 23:3857-63. [PMID: 23719231 DOI: 10.1016/j.bmcl.2013.04.071] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 04/23/2013] [Accepted: 04/26/2013] [Indexed: 01/16/2023]
Abstract
Replacement of the dimethoxyphenyl moiety in the core skeleton of almorexant by appropriately substituted imidazoles afforded novel 1-chloro-5,6,7,8-tetrahydroimidazo[1,5-a]pyrazine derivatives as potent dual orexin receptor antagonists. We describe in this Letter our efforts to further optimize the potency and brain penetration of these derivatives by fine-tuning of the pivotal phenethyl motif, and we comment on the sleep-promoting activity of selected compounds in a rat electroencephalographic (EEG) model.
Collapse
Affiliation(s)
- Thierry Sifferlen
- Actelion Pharmaceuticals Ltd, Drug Discovery and Preclinical Research & Development, Gewerbestrasse 16, CH-4123 Allschwil, Switzerland
| | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Feng R, Xiao A, Zhang X, Tang Y, Lei M. Origins of enantioselectivity in asymmetric ketone hydrogenation catalyzed by a RuH2(binap)(cydn) complex: insights from a computational study. Dalton Trans 2013. [DOI: 10.1039/c2dt32210b] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
14
|
Tangdenpaisal K, Phakhodee W, Ruchirawat S, Ploypradith P. Facile synthesis of diarylmethanes via quinone methides. Tetrahedron 2013. [DOI: 10.1016/j.tet.2012.10.087] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
15
|
Cornwall RG, Wong OA, Du H, Ramirez TA, Shi Y. A novel class of tunable cyclopropanation reagents (RXZnCH2Y) and their synthetic applications. Org Biomol Chem 2012; 10:5498-513. [PMID: 22688971 DOI: 10.1039/c2ob25481f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Simmons-Smith cyclopropanation is a widely used method to synthesize cyclopropanes from alkenes using methylene iodide and a zinc reagent. A novel class of organozinc species, RXZnCH(2)Y, has been found to efficiently cyclopropanate alkenes, including traditionally unreactive unfunctionalized alkenes. The reactivity and selectivity of this class of organozinc reagents can be regulated by tuning the electronic and/or steric nature of the RX group attached to Zn. During recent years, this class of organozinc reagent has been widely used in organic synthesis as a reagent for cyclopropanation and other useful synthetic transformations. Catalytic, asymmetric versions of this reaction have been developed providing high enantiomeric excess for unfunctionalized olefins.
Collapse
Affiliation(s)
- Richard G Cornwall
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
| | | | | | | | | |
Collapse
|
16
|
Sui YZ, Zhang XC, Wu JW, Li S, Zhou JN, Li M, Fang W, Chan ASC, Wu J. CuII-Catalyzed Asymmetric Hydrosilylation of Diaryl- and Aryl Heteroaryl Ketones: Application in the Enantioselective Synthesis of Orphenadrine and Neobenodine. Chemistry 2012; 18:7486-92. [DOI: 10.1002/chem.201200379] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2012] [Indexed: 11/08/2022]
|
17
|
Magano J, Dunetz JR. Large-Scale Carbonyl Reductions in the Pharmaceutical Industry. Org Process Res Dev 2012. [DOI: 10.1021/op2003826] [Citation(s) in RCA: 292] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Javier Magano
- Chemical Research and Development, Pharmaceutical Sciences, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Joshua R. Dunetz
- Chemical Research and Development, Pharmaceutical Sciences, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| |
Collapse
|
18
|
Might the observed α2A-adrenoreceptor agonism or antagonism of allyphenyline analogues be ascribed to different molecular conformations? Bioorg Med Chem 2012; 20:2082-90. [DOI: 10.1016/j.bmc.2012.01.035] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2011] [Revised: 01/18/2012] [Accepted: 01/21/2012] [Indexed: 11/21/2022]
|
19
|
|
20
|
Fuchibe K, Koseki Y, Aono T, Sasagawa H, Ichikawa J. NHC-catalyzed generation of difluorocarbene and its application to difluoromethylation of oxygen nucleophiles. J Fluor Chem 2012. [DOI: 10.1016/j.jfluchem.2011.09.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
|
21
|
Wang F, Huang W, Hu J. Difluoromethylation of O-, S-, N-, C-Nucleophiles Using Difluoromethyltri(n-butyl)ammonium Chloride as a New Difluorocarbene Source. CHINESE J CHEM 2011. [DOI: 10.1002/cjoc.201100325] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
22
|
Scott HK, Aggarwal VK. Highly Enantioselective Synthesis of Tertiary Boronic Esters and their Stereospecific Conversion to other Functional Groups and Quaternary Stereocentres. Chemistry 2011; 17:13124-32. [DOI: 10.1002/chem.201102581] [Citation(s) in RCA: 149] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
23
|
Fuchibe K, Koseki Y, Sasagawa H, Ichikawa J. N-Heterocyclic Carbene-catalyzed Difluorocarbene Generation and its Application to Aryl Difluoromethyl Ether Synthesis. CHEM LETT 2011. [DOI: 10.1246/cl.2011.1189] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
24
|
Sperry JB, Sutherland K. A Safe and Practical Procedure for the Difluoromethylation of Methyl 4-Hydroxy-3-iodobenzoate. Org Process Res Dev 2011. [DOI: 10.1021/op200052z] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jeffrey B. Sperry
- Wyeth Research, Department of Chemical and Pharmaceutical Development, 401 North Middletown Road, Pearl River, New York 10965, United States
| | - Karen Sutherland
- Wyeth Research, Department of Chemical and Pharmaceutical Development, 401 North Middletown Road, Pearl River, New York 10965, United States
| |
Collapse
|
25
|
Magano J, Dunetz JR. Large-Scale Applications of Transition Metal-Catalyzed Couplings for the Synthesis of Pharmaceuticals. Chem Rev 2011; 111:2177-250. [PMID: 21391570 DOI: 10.1021/cr100346g] [Citation(s) in RCA: 1270] [Impact Index Per Article: 97.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Javier Magano
- Research API, Pharmaceutical Sciences, Pfizer, Inc., Eastern Point Road, Groton, Connecticut 06340, United States
| | - Joshua R. Dunetz
- Research API, Pharmaceutical Sciences, Pfizer, Inc., Eastern Point Road, Groton, Connecticut 06340, United States
| |
Collapse
|
26
|
Nave S, Sonawane RP, Elford TG, Aggarwal VK. Protodeboronation of Tertiary Boronic Esters: Asymmetric Synthesis of Tertiary Alkyl Stereogenic Centers. J Am Chem Soc 2010; 132:17096-8. [DOI: 10.1021/ja1084207] [Citation(s) in RCA: 190] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stefan Nave
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | - Ravindra P. Sonawane
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | - Tim G. Elford
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | - Varinder K. Aggarwal
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| |
Collapse
|
27
|
Kmentova I, Sutherland HS, Palmer BD, Blaser A, Franzblau SG, Wan B, Wang Y, Ma Z, Denny WA, Thompson AM. Synthesis and structure-activity relationships of aza- and diazabiphenyl analogues of the antitubercular drug (6S)-2-nitro-6-{[4-(trifluoromethoxy)benzyl]oxy}-6,7-dihydro-5H-imidazo[2,1-b][1,3]oxazine (PA-824). J Med Chem 2010; 53:8421-39. [PMID: 21069962 DOI: 10.1021/jm101288t] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
New heterocyclic analogues of the potent biphenyl class derived from antitubercular drug PA-824 were prepared, aiming to improve aqueous solubility but maintain high metabolic stability and efficacy. The strategy involved replacement of one or both phenyl groups by pyridine, pyridazine, pyrazine, or pyrimidine, in order to reduce lipophilicity. For para-linked biaryls, hydrophilicities (ClogP) correlated with measured solubilities, but highly soluble bipyridine analogues displayed weak antitubercular activities. A terminal pyridine or proximal heterocycle allowed retention of potency and provided solubility improvements, particularly at low pH, with examples from the latter classes displaying the better in vivo efficacies, high metabolic stabilities, and excellent pharmacokinetics. Five such compounds were >100-fold better than the parent drug in a mouse model of acute Mycobacterium tuberculosis infection, and two orally bioavailable pyridine analogues (3-4-fold more soluble than the parent at low pH) were superior to antitubercular drug OPC-67683 in a chronic infection model.
Collapse
Affiliation(s)
- Iveta Kmentova
- Auckland Cancer Society Research Centre, School of Medical Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Moro AV, Tiekink ERT, Zukerman-Schpector J, Lüdtke DS, Correia CRD. Chiral Triphenylprolinol Ligands for the Efficient Catalytic Asymmetric Arylation of Aldehydes. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000336] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
29
|
Wouters AD, Trossini GHG, Stefani HA, Lüdtke DS. Enantioselective Arylations Catalyzed by Carbohydrate-Based Chiral Amino Alcohols. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000113] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
30
|
Palmer BD, Thompson AM, Sutherland HS, Blaser A, Kmentova I, Franzblau SG, Wan B, Wang Y, Ma Z, Denny WA. Synthesis and structure-activity studies of biphenyl analogues of the tuberculosis drug (6S)-2-nitro-6-{[4-(trifluoromethoxy)benzyl]oxy}-6,7-dihydro-5H-imidazo[2,1-b][1,3]oxazine (PA-824). J Med Chem 2010; 53:282-94. [PMID: 19928920 DOI: 10.1021/jm901207n] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A series of biphenyl analogues of the new tuberculosis drug PA-824 was prepared, primarily by coupling the known (6S)-2-nitro-6,7-dihydro-5H-imidazo[2,1-b][1,3]oxazin-6-ol with iodobenzyl halides, followed by Suzuki coupling of these iodides with appropriate arylboronic acids or by assembly of the complete biaryl side chain prior to coupling with the above alcohol. Antitubercular activity was determined under both replicating (MABA) and nonreplicating (LORA) conditions. para-Linked biaryls were the most active, followed by meta-linked and then ortho-linked analogues. A more detailed study of a larger group of para-linked analogues showed a significant correlation between potency (MABA) and both lipophilicity (CLOGP) and the electron-withdrawing properties of terminal ring substituents ( summation operatorsigma). Selected compounds were evaluated for their efficacy in a mouse model of acute Mycobacterium tuberculosis infection. In vivo activity correlated well with the stability of compounds to microsomal metabolism. Three compounds bearing combinations of lipophilic, electron-withdrawing groups achieved >200-fold higher efficacies than the parent drug.
Collapse
Affiliation(s)
- Brian D Palmer
- Auckland Cancer Society Research Centre, School of Medical Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Chen Y, Tang Y, Liu S, Lei M, Fang W. Mechanism and Influence of Acid in Hydrogenation of Ketones by η6-Arene/N-Tosylethylenediamine Ruthenium(II). Organometallics 2009. [DOI: 10.1021/om8012212] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yue Chen
- Institute of Materia Medica and Department of Chemistry, School of Science, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China, College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, People's Republic of China, and The Renaissance Computing Institute (RENCI), University of North Carolina, Chapel Hill, North Carolina 27599-3420
| | - Yanhui Tang
- Institute of Materia Medica and Department of Chemistry, School of Science, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China, College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, People's Republic of China, and The Renaissance Computing Institute (RENCI), University of North Carolina, Chapel Hill, North Carolina 27599-3420
| | - Shubin Liu
- Institute of Materia Medica and Department of Chemistry, School of Science, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China, College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, People's Republic of China, and The Renaissance Computing Institute (RENCI), University of North Carolina, Chapel Hill, North Carolina 27599-3420
| | - Ming Lei
- Institute of Materia Medica and Department of Chemistry, School of Science, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China, College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, People's Republic of China, and The Renaissance Computing Institute (RENCI), University of North Carolina, Chapel Hill, North Carolina 27599-3420
| | - Weihai Fang
- Institute of Materia Medica and Department of Chemistry, School of Science, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China, College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, People's Republic of China, and The Renaissance Computing Institute (RENCI), University of North Carolina, Chapel Hill, North Carolina 27599-3420
| |
Collapse
|
32
|
Thomas S, Aggarwal V. Asymmetric Hydroboration of 1,1-Disubstituted Alkenes. Angew Chem Int Ed Engl 2009; 48:1896-8. [DOI: 10.1002/anie.200805604] [Citation(s) in RCA: 115] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
33
|
Thomas S, Aggarwal V. Asymmetrische Hydroborierung von 1,1-disubstituierten Alkenen. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200805604] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
34
|
Hu J, Zhang W, Wang F. Selective difluoromethylation and monofluoromethylation reactions. Chem Commun (Camb) 2009:7465-78. [DOI: 10.1039/b916463d] [Citation(s) in RCA: 524] [Impact Index Per Article: 34.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
35
|
Synthesis of enantiopure 3,6,7,8-tetrahydrochromeno[7,8-d]imidazoles via asymmetric ketone hydrogenation in the presence of RuCl2[Xyl-P-Phos][DAIPEN]. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.08.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
|
36
|
Farina V, Reeves JT, Senanayake CH, Song JJ. Asymmetric synthesis of active pharmaceutical ingredients. Chem Rev 2007; 106:2734-93. [PMID: 16836298 DOI: 10.1021/cr040700c] [Citation(s) in RCA: 384] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vittorio Farina
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, Ridgefield, Connecticut 06877, USA
| | | | | | | |
Collapse
|
37
|
Zheng J, Li Y, Zhang L, Hu J, Meuzelaar GJ, Federsel HJ. Chlorodifluoromethyl phenyl sulfone: a novel non-ozone-depleting substance-based difluorocarbene reagent for O- and N-difluoromethylations. Chem Commun (Camb) 2007:5149-51. [DOI: 10.1039/b713156a] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
38
|
Five-membered ring systems: with N and S (Se, Te) atoms. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/s0959-6380(07)80013-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
|
39
|
Abstract
The synthesis of diarylmethanols via the reduction of a range of substituted benzophenone and benzoylpyridine derivatives with ketoreductase enzymes (KREDs) has afforded chiral products with high yield (>90%) and ee (up to >99%). Ortho, meta, and para substitutions with a variety of electron-donating, electron-withdrawing, and halogen groups were examined. Substitution at the ortho position and/or highly electronically dissymmetric molecules were not required for good selectivity, as is the case with conventional chemical catalyst reductions. [reaction: see text].
Collapse
Affiliation(s)
- Matthew D Truppo
- Department of Process Research, Merck Research Laboratories, Merck & Co., Inc., P.O. Box 2000, Rahway, New Jersey 07065, USA.
| | | | | |
Collapse
|
40
|
Zhang L, Zheng J, Hu J. 2-Chloro-2,2-difluoroacetophenone: A Non-ODS-Based Difluorocarbene Precursor and Its Use in the Difluoromethylation of Phenol Derivatives. J Org Chem 2006; 71:9845-8. [PMID: 17168605 DOI: 10.1021/jo061799l] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel and non-ODS-based (ODS = ozone-depleting substance) preparation of 2-chloro-2,2-difluoroacetophenone (1) was achieved in high yield by using 2,2,2-trifluoroacetophenone as the starting material. Compound 1 was found to act as a good difluorocarbene reagent, which readily reacts with a variety of structurally diverse phenol derivatives 4 in the presence of potassium hydroxide or potassium carbonate to produce aryl difluoromethyl ethers 5 in good yields. This new and easy-to-handle synthetic methodology offers an environmentally friendly alternative to other Freon- or Halon-based difluoromethylating approaches.
Collapse
Affiliation(s)
- Laijun Zhang
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | | | | |
Collapse
|
41
|
Abstract
[reaction: see text] A novel one-pot synthesis of N-difluoromethyl-2-pyridones is described. N-(Pyridin-2-yl)acetamide derivatives were excellent precursors for the preparation of N-difluoromethyl-2-pyridone derivatives. Difluoromethylation of 2-acetaminopyridine derivatives was achieved with sodium chlorodifluoroacetate as a difluorocarbene source in the presence of a catalytic amount of 18-crown-6. Subsequent in situ hydrolysis of resultant 1,2-dihydro-2-acetimino-1-difluoromethylpyridines proceeded under mild acidic conditions to afford the corresponding N-difluoromethyl-2-pyridones in moderate to good yields.
Collapse
Affiliation(s)
- Makoto Ando
- Tsukuba Research Institute, Banyu Pharmaceutical Company, Ltd., Okubo 3, Tsukuba 300-2611, Japan.
| | | | | |
Collapse
|
42
|
Hillier MC, Marcoux JF, Zhao D, Grabowski EJJ, McKeown AE, Tillyer RD. Stereoselective formation of carbon-carbon bonds via SN2-displacement: synthesis of substituted cycloalkyl[b]indoles. J Org Chem 2006; 70:8385-94. [PMID: 16209582 DOI: 10.1021/jo051146p] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A general asymmetric synthesis of substituted cycloalkyl[b]indoles has been accomplished. The key features of this approach are (1) the utilization of a Japp-Klingemann condensation/Fischer cyclization to prepare cycloalkyl[b]indolones, (2) the asymmetric borane reduction of these heterocyclic ketones with (S)-OAB to obtain enantiomerically pure alcohols, and (3) the stereoselective S(N)2-displacement of these indole alcohol substrates with a carbon nucleophile under Mitsunobu conditions to set the C1 or C3 tertiary carbon stereocenter. The use of trimethylphosphine (PMe3) and bis(2,2,2-trichloroethyl) azodicarboxylate (TCEAD) was found to have an effect on the Mitsunobu dehydrative alkylation.
Collapse
Affiliation(s)
- Michael C Hillier
- Department of Process Research, Merck and Company, P.O. Box 2000, Rahway, New Jersey 07065, USA.
| | | | | | | | | | | |
Collapse
|
43
|
Wu PY, Wu HL, Uang BJ. Asymmetric Synthesis of Functionalized Diarylmethanols Catalyzed by a New γ-Amino Thiol. J Org Chem 2005; 71:833-5. [PMID: 16409006 DOI: 10.1021/jo052017b] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] A mild asymmetric arylation of aromatic aldehydes catalyzed by gamma-amino thiol 5 gave the corresponding diarylmethanols with 95 to >99.5% ee.
Collapse
Affiliation(s)
- Ping-Yu Wu
- Department of Chemistry, National Tsing Hua University, Hsinchu, 300 Taiwan
| | | | | |
Collapse
|
44
|
Chen CY, Reamer RA, Roy A, Chilenski JR. α-Methoxyphenyl acetic acid (MPA) for the configurational assignment of aromatic–heteroaromatic carbinols by 1H NMR spectroscopy. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.06.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|