Efficient Synthesis of Substituted 3-Azabicyclo[3.1.0]hexan-2-ones from 2-Iodocyclopropanecarboxamides Using a Copper-Free Sonogashira Coupling
作者:Benoît de Carné-Carnavalet、Alexis Archambeau、Christophe Meyer、Janine Cossy、Benoît Folléas、Jean-Louis Brayer、Jean-Pierre Demoute
DOI:10.1002/chem.201203153
日期:2012.12.21
heteroaryl‐alkynes or enynes, followed by 5‐exo‐dig cyclization of the nitrogen amide onto the carbon–carbon triple bond, provides a remarkably efficient access to a variety of substituted 4‐methylene‐3‐azabicyclo[3.1.0]hexan‐2‐ones in excellent yields. Protonation of these latter enamides generates bicyclic N‐acyliminium ions that can be involved in Pictet–Spenglercyclizations leading to new 3‐azabicyclo[3.1.0]hexan‐2‐ones
Diastereodivergent Pictet-Spengler Cyclization of Bicyclic<i>N</i>-Acyliminium Ions: Controlling a Quaternary Stereocenter
作者:Benoît de Carné-Carnavalet、Jean-Philippe Krieger、Benoît Folléas、Jean-Louis Brayer、Jean-Pierre Demoute、Christophe Meyer、Janine Cossy
DOI:10.1002/ejoc.201403469
日期:2015.2
of the Pictet–Spenglercyclization of bicyclic N-acyliminium ions that contain a 3-azabicyclo[n.3.0]alkane core and an electron-rich π-nucleophilic moiety, such as an indol-2-yl, indol-3-yl, 1-methylpyrrol-2-yl, or 3,5-dimethoxyphenyl group, was examined. The N-acyliminium ions were generated by protonation of the corresponding enamides or hemiaminals, which were derived from imides. Control of the
A Sonogashira Cross-Coupling/5-<i>exo</i>-dig Cyclization/Ionic Hydrogenation Sequence: Synthesis of 4-Substituted 3-Azabicyclo[3.1.0]hexan-2-ones from 2-Iodocyclopropanecarboxamides
作者:Benoît de Carné-Carnavalet、Christophe Meyer、Janine Cossy、Benoît Folléas、Jean-Louis Brayer、Jean-Pierre Demoute
DOI:10.1021/jo400713u
日期:2013.6.7
A variety of 4-substituted 3-azabicyclo[3.1.0]hexan-2-ones have been prepared from2-iodocyclopropanecarboxamides by a three-step sequence involving a copper-freeSonogashiracoupling with terminal aryl- or heteroarylalkynes, followed by a 5-exo-dig cyclization and an ionic hydrogenation.
Development of a Scalable Synthesis of BMS-978587 Featuring a Stereospecific Suzuki Coupling of a Cyclopropane Carboxylic Acid
作者:Prantik Maity、V. V. Ramana Reddy、Jayaraj Mohan、Satish Korapati、Harishkumar Narayana、Nagesh Cherupally、Sathishkumar Chandrasekaran、Ravikumar Ramachandran、Chris Sfouggatakis、Martin D. Eastgate、Eric M. Simmons、Rajappa Vaidyanathan
DOI:10.1021/acs.oprd.8b00171
日期:2018.7.20
chemoselective nitro reduction and a stereospecific Suzukicoupling as the key bond formation steps. A systematic evaluation of the reaction conditions led to the identification of a robust catalyst/ligand/base combination to reproducibly effect the Suzuki reaction on large scale. The modified route avoided several challenges with the original synthesis and furnished the API in high overall yield and purity
Synthesis and properties of the valence tautomer of cis-iodosocyclopropanecarboxylic acid: 4,5-methano-1-hydroxyiodoxol-3(1H)-one
作者:Robert A. Moss、Boguslawa Wilk、Karsten Krogh-Jespersen、John D. Westbrook
DOI:10.1021/ja00199a036
日期:1989.8
Le compose du titre peut etre synthetise par hydrolyse de l'acide dichloroiodoso-2 cyclopropanecarboxylique; la base associee a l'acide obtenu est un nucleophile qui par action sur le (diphenyl nitro-4 phenyl) phsophate provoque la coupure de celui-ci; des calculs ab initio sont effectues sur le compose du titre
Le compose du titre peut etre synthetise par hydrolyse de l'acide dichloroiodoso-2 cyclopropanecarboxylique; la base associee a l'acide obtenu est un nucleophile qui par action sur le (diphenyl nitro-4 phenyl) phsophate provoque la coupure de celui-ci;des calculs ab initio sont effectues sur le compose du titre