[EN] A PROCESS FOR SYNTHESIS OF CHIRAL 3-SUBSTITUTED TETRAHYDROQUINOLINE DERIVATIVES [FR] PROCESSUS DE SYNTHÈSE DE DÉRIVÉS TÉTRAHYDROQUINOLINE CHIRAUX 3-SUBSTITUÉS
Process for Synthesis of Chiral 3-Substituted Tetrahydroquinoline Derivatives
申请人:Council of Scientific & Industrial Research
公开号:US20150038714A1
公开(公告)日:2015-02-05
The present invention relates to novel and concise process for the construction of chiral 3-substituted tetrahyroquinoline derivatives based on proline catalyzed asymmetric α-functionalization of aldehyde, followed by in situ reductive cyclization of nitro group under catalytic hydrogenation condition with high optical purities. Further the invention relates to conversion of derived chiral 3-substituted tetrahydroquinoline derivatives into therapeutic agents namely (−)-sumanirole (96% ee) and 1-[(S)-3-(di-methylamino)-3,4-dihydro-6,7-dimethoxy-quinolin-1(2H)-yl]propanone[(S)-903] (92% ee).
Proline catalyzed sequential α-aminooxylation or -amination/reductive cyclization of o-nitrohydrocinnamaldehydes: a high yield synthesis of chiral 3-substituted tetrahydroquinolines
作者:Varun Rawat、B. Senthil Kumar、Arumugam Sudalai
DOI:10.1039/c3ob40320c
日期:——
A new sequential organocatalytic method for the synthesis of chiral 3-substituted (X = OH, NH2) tetrahydroquinoline derivatives (THQs) [ee up to 99%, yield up to 87%] based on α-aminooxylation or -amination followed by reductive cyclization of o-nitrohydrocinnamaldehydes has been described. This methodology has been efficiently demonstrated in the synthesis of two important bioactive molecules namely (â)-sumanirole (96% ee) and 1-[(S)-3-(dimethylamino)-3,4-dihydro-6,7-dimethoxy-quinolin-1(2H)-yl]propanone (92% ee).
A Cu-catalyzedregio- and enantioselective hydroboration of 1,2-dihydroquinolines with high yields and excellent enantioselectivities (up to 98% ee) was presented. This method could be applied in the asymmetric synthesis of the important intermediates used in the enantioselectivesynthesis of the potential agent Sumanirole for the treatment of Parkinson’s disease and of the potentially interesting
Kinetic Resolution of α‐Hydroxy‐Substituted Oxime Ethers by Enantioselective Cu−H‐Catalyzed Si−O Coupling
作者:Xichang Dong、Yuji Kita、Martin Oestreich
DOI:10.1002/anie.201802947
日期:2018.8.13
A catalyst‐controlled enantioselective alcohol silylation by Cu−H‐catalyzed dehydrogenative Si−O coupling of hydroxy groups α to an oxime ether and simple hydrosilanes is reported. The selectivity factors reached in this kineticresolution are generally high (s≈50), and these reactions thereby provide reliable access to highly enantioenriched α‐hydroxy‐substituted oxime ethers. The synthetic usefulness
Process for synthesis of chiral 3-substituted tetrahydroquinoline derivatives
申请人:Council of Scientific & Industrial Research
公开号:US09163038B2
公开(公告)日:2015-10-20
The present invention relates to novel and concise process for the construction of chiral 3-substituted tetrahyroquinoline derivatives based on proline catalyzed asymmetric α-functionalization of aldehyde, followed by in situ reductive cyclization of nitro group under catalytic hydrogenation condition with high optical purities. Further the invention relates to conversion of derived chiral 3-substituted tetrahydroquinoline derivatives into therapeutic agents namely (−)-sumanirole (96% ee) and 1-[(S)-3-(di-methylamino)-3,4-dihydro-6,7-dimethoxy-quinolin-1(2H)-yl]propanone[(S)-903] (92% ee).