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Biallas P, Yamazaki K, Dixon DJ. Difluoroalkylation of Tertiary Amides and Lactams by an Iridium-Catalyzed Reductive Reformatsky Reaction. Org Lett 2022; 24:2002-2007. [PMID: 35258311 PMCID: PMC9082613 DOI: 10.1021/acs.orglett.2c00438] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Indexed: 12/16/2022]
Abstract
An iridium-catalyzed, reductive alkylation of abundant tertiary lactams and amides using 1-2 mol % of Vaska's complex (IrCl(CO)(PPh3)2), tetramethyldisiloxane (TMDS), and difluoro-Reformatsky reagents (BrZnCF2R) for the general synthesis of medicinally relevant α-difluoroalkylated tertiary amines is described. A broad scope (46 examples), including N-aryl- and N-heteroaryl-substituted lactams, demonstrated an excellent functional group tolerance. Furthermore, late-stage drug functionalizations, a gram-scale synthesis, and common downstream transformations proved the potential synthetic relevance of this new methodology.
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Affiliation(s)
- Phillip Biallas
- Chemistry Research Laboratory, Department
of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 2JD, U.K.
| | - Ken Yamazaki
- Chemistry Research Laboratory, Department
of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 2JD, U.K.
| | - Darren J. Dixon
- Chemistry Research Laboratory, Department
of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 2JD, U.K.
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2
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Mei H, Xie C, Aceña JL, Soloshonok VA, Röschenthaler GV, Han J. Recent Progress in the in situ Detrifluoroacetylative Generation of Fluoro Enolates and Their Reactions with Electrophiles. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500787] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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3
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Fustero S, Simón-Fuentes A, Barrio P, Haufe G. Olefin Metathesis Reactions with Fluorinated Substrates, Catalysts, and Solvents. Chem Rev 2014; 115:871-930. [DOI: 10.1021/cr500182a] [Citation(s) in RCA: 142] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Santos Fustero
- Departamento
de Química Orgánica, Universidad de Valencia, E-46100 Burjassot, Spain
- Laboratorio
de Moléculas Orgánicas, Centro de Investigación Príncipe Felipe, E-46012 Valencia, Spain
| | | | - Pablo Barrio
- Departamento
de Química Orgánica, Universidad de Valencia, E-46100 Burjassot, Spain
| | - Günter Haufe
- Organisch-Chemisches
Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, D-48149 Münster, Germany
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4
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Liu YL, Yu JS, Zhou J. Catalytic Asymmetric Construction of Stereogenic Carbon Centers that Feature agem-Difluoroalkyl Group. ASIAN J ORG CHEM 2013. [DOI: 10.1002/ajoc.201200131] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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5
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March TL, Johnston MR, Duggan PJ, Gardiner J. Synthesis, Structure, and Biological Applications ofα-Fluorinatedβ-Amino Acids and Derivatives. Chem Biodivers 2012; 9:2410-41. [DOI: 10.1002/cbdv.201200307] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Indexed: 01/30/2023]
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6
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March TL, Johnston MR, Duggan PJ. Diastereoselective Synthesis of Aliphatic α,α-Difluoro-β3-Amino Esters via a Sonocatalyzed Reformatsky Reaction. Org Lett 2011; 14:182-5. [DOI: 10.1021/ol202969w] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Taryn L March
- School of Chemical and Physical Sciences, Flinders University , SA 5042, Australia
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Kashikura W, Mori K, Akiyama T. Chiral Phosphoric Acid Catalyzed Enantioselective Synthesis of β-Amino-α,α-difluoro Carbonyl Compounds. Org Lett 2011; 13:1860-3. [DOI: 10.1021/ol200374m] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Wataru Kashikura
- Department of Chemistry, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Keiji Mori
- Department of Chemistry, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Takahiko Akiyama
- Department of Chemistry, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
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Liu N, Cao S, Shen L, Wu J, Yu J, Zhang J, Li H, Qian X. New gem-difluoromethylene-containing isocyanide as a useful building block for the synthesis of difluorinated pseudopeptides via Ugi reaction. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.02.056] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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9
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Boyer N, Gloanec P, De Nanteuil G, Jubault P, Quirion JC. Synthesis of α,α-Difluoro-β-amino Esters orgem-Difluoro-β-lactams as Potential Metallocarboxypeptidase Inhibitors. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800363] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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10
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Fustero S, Sánchez-Roselló M, Rodrigo V, Sanz-Cervera J, Piera J, Simón-Fuentes A, del Pozo C. Solution-, Solid-Phase, and Fluorous Synthesis of β,β-Difluorinated Cyclic Quaternary α-Amino Acid Derivatives: A Comparative Study. Chemistry 2008; 14:7019-29. [DOI: 10.1002/chem.200702009] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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11
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Boyer N, Gloanec P, De Nanteuil G, Jubault P, Quirion JC. Chemoselective and stereoselective synthesis of gem-difluoro-β-aminoesters or gem-difluoro-β-lactams from ethylbromodifluoroacetate and imines during Reformatsky reaction. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.09.058] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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13
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Dondoni A, Massi A, Sabbatini S. Multiple Component Approaches to C-Glycosyl β-Amino Acids by Complementary One-Pot Mannich-Type and Reformatsky-Type Reactions. Chemistry 2005; 11:7110-25. [PMID: 16224807 DOI: 10.1002/chem.200500823] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The development of new methods for the preparation of C-glycosyl beta-amino acid libraries with chemical and stereochemical diversity levels was investigated and the results are described herein. Two complementary one-pot three-component Mannich-type and Reformatsky-type synthetic strategies have been developed for the construction of chiral 3-amino propanoate fragments (eventually bis-substituted at C-2) directly linked to the anomeric carbon of pyranose and furanose residues. Both methods involved as the initial step the coupling of a sugar aldehyde to p-methoxybenzylamine but differed in the nucleophile (a d(2) synthon equivalent) which was successively added: a ketene silyl acetal (Mannich route) or a bromozinc enolate (Reformatsky route). Individual C-glycosyl beta-amino esters were isolated as single 3R diastereoisomers in fair to excellent yield (60-90%) and their structure assigned by NMR spectroscopy (Riguera protocol) supported by X-ray crystallography. A tentative explanation of the observed stereochemical outcome based on transition-state models is provided. A preliminary study on the synthesis of alpha,alpha-difluoro C-glycosyl beta-amino acids via a more traditional Reformatsky route is also reported.
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Affiliation(s)
- Alessandro Dondoni
- Laboratorio di Chimica Organica, Dipartimento di Chimica, Università di Ferrara, Via L. Borsari 46, 44100 Ferrara, Italy.
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Chung WJ, Omote M, Welch JT. The Catalytic Mannich Reaction of 1,1-Difluoro-2-trialkyl(aryl)silyl-2-trimethyl-silyloxyethenes: Preparation of β-Amino Acid Derivatives. J Org Chem 2005; 70:7784-7. [PMID: 16149816 DOI: 10.1021/jo050953l] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] Catalytic Mannich reactions of 1,1-difluoro-2-trialkyl(aryl)silyl-2-trimethylsilyloxyethenes (3) with a variety of sulfonylimines were utilized for the preparation of alpha,alpha-difluoro-beta-amino acid derivatives (7). The influence of the Lewis acid on the reaction was examined. Methods for the conversion of alpha,alpha-difluoroacylsilanes to alpha,alpha-difluorocarboxylic acids were also explored.
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Affiliation(s)
- Woo Jin Chung
- Department of Chemistry, University at Albany, State University of New York, 1400 Washington Avenue, Albany, New York 12222, USA
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Fustero S, Piera J, Sanz-Cervera JF, Catalán S, Ramírez de Arellano C. A Versatile Synthesis of Fluorinated Uracils in Solution and on Solid-Phase. Org Lett 2004; 6:1417-20. [PMID: 15101756 DOI: 10.1021/ol049668z] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] An efficient and convenient two-step synthesis of new fluorinated uracils is described. The first step involves the condensation of an ester enolate with a fluorinated nitrile to furnish fluorinated beta-enamino esters. In turn, these compounds react with organic isocyanates or isothiocyanates to give C-6 fluorinated uracils or thiouracils, respectively, in excellent yields. This synthesis has been successfully adapted to solid-phase conditions with high diversity, thereby facilitating the creation of small (thio)uracil libraries.
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Affiliation(s)
- Santos Fustero
- Departamento de Química Orgánica, Universidad de Valencia, E-46100 Burjassot, Spain.
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18
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Gouge V, Jubault P, Quirion JC. Synthesis of difluorinated pseudopeptides using chiral α,α-difluoro-β-amino acids in the Ugi reaction. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2003.11.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Hung MH, Long L, Yang ZY. New and Efficient Syntheses of α-Iodo-α,α-Difluoro- and β-Iodo-α,α,β,β-Tetrafluorocarboxylic Acid Derivatives as Useful Building Blocks for Making Functional Fluoro Compounds. J Org Chem 2003; 69:198-201. [PMID: 14703399 DOI: 10.1021/jo035170j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Perfluoroolefins reacted with I-Cl and ClSO(3)H under mild conditions to give R(F)CFICF(2)OSO(2)Cl, which could be readily converted into various alpha-iodo-perfluorocarboxylic acid derivatives or telomerized with tetrafluoroethylene to I(CF(2)CF(2))(n)()OSO(2)Cl. Ring-opening reaction of perfluoroalkoxypentafluorocyclopropane with iodine at 240 degrees C produced ICF(2)CF(2)COF, which was quenched by alcohol, water, or NH(3) to give beta-iodo-alpha,alpha,beta,beta-tetrafluorocarboxylic acid derivatives. These functional fluorinated iodides can be used as building blocks for making selectively fluorinated compounds.
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Affiliation(s)
- Ming-H Hung
- DuPont Dow Elastomers, L.L.C., and DuPont Central Research and Development, Experimental Station, Wilmington, Delaware 19880, USA
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Sorochinsky A, Voloshin N, Markovsky A, Belik M, Yasuda N, Uekusa H, Ono T, Berbasov DO, Soloshonok VA. Convenient asymmetric synthesis of beta-substituted alpha,alpha-difluoro-beta-amino acids via Reformatsky reaction between Davis' N-sulfinylimines and ethyl bromodifluoroacetate. J Org Chem 2003; 68:7448-54. [PMID: 12968899 DOI: 10.1021/jo030082k] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The enantiopure Davis' N-sulfinylimines were found to be efficient as chiral imine equivalents in the high-temperature Reformatsky-type additions with BrZnCF(2)COOEt affording an efficient approach to the enantiomerically pure alpha,alpha-difluoro-beta-amino acids. High chemical and stereochemical yields (drs > 9:1, and as high as 99:1) render this method immediately useful for preparing the target amino acids.
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Affiliation(s)
- Alexander Sorochinsky
- Institute of Bioorganic Chemistry and Petrochemistry, Ukrainian Academy of Sciences, Kiev-94, 253660, Ukraine.
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22
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Dolle RE. Comprehensive survey of combinatorial library synthesis: 2001. JOURNAL OF COMBINATORIAL CHEMISTRY 2002; 4:369-418. [PMID: 12217012 DOI: 10.1021/cc020039v] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Roland E Dolle
- Department of Chemistry, Adolor Corporation, 371 Phoenixville Pike, Malvern, PA 19355, USA.
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23
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Sasmal S, Geyer A, Maier ME. Synthesis of cyclic peptidomimetics from aldol building blocks. J Org Chem 2002; 67:6260-3. [PMID: 12182676 DOI: 10.1021/jo025889b] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Aldol products (3-hydroxy acids) with an allyl-protected hydroxy group were converted to amino alcohols by Curtius rearrangement. Combination of the carboxylic acid with the amino alcohols gave the amides 10. Ring-closing metathesis led to the 12-membered lactams 12 as mixtures of E/Z-isomers. The scheme was also transferred to the solid-phase. In this case the macrolactams are formed via cyclorelease. For a pair of E/Z-isomers the solution conformation was determined by ROESY spectroscopy.
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Affiliation(s)
- Sanjita Sasmal
- Institut für Organische Chemie, Universität Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany
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Soloshonok VA, Ohkura H, Sorochinsky A, Voloshin N, Markovsky A, Belik M, Yamazaki T. Convenient, large-scale asymmetric synthesis of β-aryl-substituted α,α-difluoro-β-amino acids. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)01103-6] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Rinnová M, Nefzi A, Houghten RA. An efficient approach for solid-phase synthesis of peptidomimetics based on 4-imidazolidinones. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)00263-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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