[EN] PREPARATION OF CHIRAL 1-METHYL-2,3,4,5-1H-BENZODIAZEPINES VIA ASYMMETRIC REDUCTION OF ALPHA-SUBSTITUTED STYRENES [FR] PRÉPARATION DE 1-MÉTHYL-2,3,4,5-1H-BENZODIAZÉPINES CHIRALES PAR RÉDUCTION ASYMÉTRIQUE DE STYRÈNES ALPHA-SUBST ITUÉS
Nickel-Catalyzed Cyanation of Aryl Halides and Hydrocyanation of Alkynes via C–CN Bond Cleavage and Cyano Transfer
作者:Hui Chen、Shuhao Sun、Yahu A. Liu、Xuebin Liao
DOI:10.1021/acscatal.9b04586
日期:2020.1.17
methods to prepare aryl nitriles and vinyl nitriles from arylhalides and alkynes, respectively. Using inexpensive and non-toxic 4-cyanopyridine N-oxide as the cyano shuttle, the methods provide an efficient approach to prepare aryl cyanides and vinyl nitriles under mild and operationally simple reaction conditions with a broad range of functional group tolerance. In hydrocyanation of alkynes, the method
Direct Access to Versatile Electrophiles via Catalytic Oxidative Cyanation of Alkenes
作者:De-Wei Gao、Ekaterina V. Vinogradova、Sri Krishna Nimmagadda、Jose M. Medina、Yiyang Xiao、Radu M. Suciu、Benjamin F. Cravatt、Keary M. Engle
DOI:10.1021/jacs.8b03704
日期:2018.7.5
discovery. Reactions that directly transform inexpensive chemical feedstocks into versatile carbon electrophiles would therefore be highly enabling. Herein, we report the catalytic, regioselective oxidative cyanation of conjugated and nonconjugated alkenes using a homogeneous copper catalyst and a bystanding N-F oxidant to furnish branched alkenyl nitriles that are difficult to prepare using existing methods
[EN] PREPARATION OF CHIRAL 1-METHYL-2,3,4,5-1H-BENZODIAZEPINES VIA ASYMMETRIC REDUCTION OF ALPHA-SUBSTITUTED STYRENES<br/>[FR] PRÉPARATION DE 1-MÉTHYL-2,3,4,5-1H-BENZODIAZÉPINES CHIRALES PAR RÉDUCTION ASYMÉTRIQUE DE STYRÈNES ALPHA-SUBST ITUÉS
申请人:LEK PHARMACEUTICALS
公开号:WO2014202765A1
公开(公告)日:2014-12-24
The present invention provides an asymmetric and economic synthesis of 8-chloro-1-methyl-2,3,4,5-tetrahydro-1 H-benzo[d]azepine via novel intermediates applying an asymmetric enzymatic, biomimetic or catalytic reduction. The present invention also provides a novel green asymmetric catalytic reduction adapted for an aqueous medium to be applied in the synthesis of 8-chloro-1-methyl-2,3,4,5-tetrahydro-1 H-benzo[d]azepine or novel intermediates.
Influence of an .alpha.-cyano function on charge delocalization in the benzyl cation. Relationship between inductive destabilization and conjugative stabilization by the cyano group
作者:Paul G. Gassman、Thomas L. Guggenheim
DOI:10.1021/jo00136a048
日期:1982.7
PREPARATION OF CHIRAL 1-METHYL-2,3,4,5-1H-BENZODIAZEPINES VIA ASYMMETRIC REDUCTION OF ALPHA-SUBSTITUTED STYRENES