[EN] ASYMMETRIC MICHAEL AND ALDOL ADDITION USING BIFUNCTIONAL CINCHONA-ALKALOID-BASED CATALYSTS<br/>[FR] ADDITIONS ASYMETRIQUES DE MICHAEL ET D'ALDOL UTILISANT DES CATALYSEURS BIFONCTIONNELS A BASE DE CINCHONINE
申请人:UNIV BRANDEIS
公开号:WO2005121137A1
公开(公告)日:2005-12-22
One aspect of the present invention relates to quinine-based and quinidine-based catalysts. Another aspect of the invention relates to a method of preparing a derivatized quinine-based or quinidine-based catalyst comprising 1) reacting quinine or quinidine with 5 base and a compound that has a suitable leaving group, and 2) converting the ring methoxy group to a hydroxy group. Another aspect of the present invention relates to a method of preparing a chiral, non-racemic compound from a prochiral electron-deficient alkene or azo compound or prochiral aldehyde or prochiral ketone, comprising the step of: reacting a prochiral electron-deficient alkene or azo compound or prochiral aldehyde or prochiral 10 ketone with a nucleophile in the presence of a catalyst; thereby producing a chiral, non racemic compound; wherein said catalyst is a derivatized quinine or quinidine. Another aspect of the present invention relates to a method of kinetic resolution, comprising the step of reacting racemic chiral alkene with a nucleophile in the presence of a derivatized quinine or quinidine.
Synthesis and studies on the antiviral activities of substituted γ-butyrolactones and butenolides
作者:A. A. Avetisyan、R. G. Nazaryan、A. N. Dzhandzhapanyan、V. I. Votyakov、S. V. Khlyustov、G. V. Vladyko、V. Ya. Klimovich、L. V. Korobchenko、M. N. Shashikhina、S. V. Zhavrid
DOI:10.1007/bf00761539
日期:1982.7
tertiary ~-ketols with substituted cyanoaceticesters leads to the formation of the corresponding acyano-B-butyrolactones (I-IV); the secondary ketoalcohols (acyloins) react with substituted acetoacetic and malonicesters to form respectively ~-acetyland ~-carbethoxy-~,B,y-trialkyl-&~Y-butenolides (V-VII), while the tertiary ~-ketols react with substituted malonicesters to yield ~,~,y,y-tetralkyl-A~B-butenolides
Assembly of α‐(Hetero)aryl Nitriles via Copper‐Catalyzed Coupling Reactions with (Hetero)aryl Chlorides and Bromides
作者:Ying Chen、Lanting Xu、Yongwen Jiang、Dawei Ma
DOI:10.1002/anie.202014638
日期:2021.3.22
conditions, affording α‐(hetero)arylacetonitriles via one‐pot decarboxylation. Additionally, the CuBr/oxalic diamide catalyzed coupling of (hetero)aryl bromides with α‐alkyl‐substituted ethyl cyanoacetates proceeds smoothly at 60 °C, leading to the formation of α‐alkyl (hetero)arylacetonitriles after decarboxylation. The method features a general substrate scope and is compatible with various functionalities
SYNTHESIS OF PYRAZOLONES FROM α-KETO AND α-CYANO ESTERS
作者:Paul E. Gagnon、Jean L. Boivin、Alexander Chisholm
DOI:10.1139/v52-109
日期:1952.11.1
directly from methylhydrazine and ethyl α-cyanopropionate. A series of 3-imino-2-methyl-5-pyrazolones monosubstituted in position 4 with pentyl, hexyl, heptyl, and octyl groups and another series disubstituted in position 4 with butyl, hexyl, and heptyl groups were also prepared from the corresponding mono- and disubstituted cyanoacetates and methylhydrazine.The ultraviolet absorption spectra were determined