Asymmetric Weitz−Scheffer Epoxidation of Isoflavones with Hydroperoxides Mediated by Optically Active Phase-Transfer Catalysts
作者:Waldemar Adam、Paraselli Bheema Rao、Hans-Georg Degen、Albert Levai、Tamás Patonay、Chantu R. Saha-Möller
DOI:10.1021/jo0162078
日期:2002.1.1
isoflavone epoxidation as illustrated for the substrate 3c. This fact indicates the pivotal role of the hydroxy group for enantioselective control, which is rationalized in terms of a hydrogen-bonded aggregate between the ether-oxygen atom of isoflavone 3 and the phase-transfer catalyst 1. The present attractive and convenient method should be useful for the preparation of opticallyactive epoxides of
ISOFLAVONE DERIVATIVES, SALTS THEREOF, AND ONCOSTATIC AND IMMUNOSUPPRESSIVE AGENTS
申请人:YAMANOUCHI PHARMACEUTICAL CO. LTD.
公开号:EP0245518A1
公开(公告)日:1987-11-19
Novel isoflavone derivatives represented by general formula (I)
and salts thereof having oncostatic and immunosupressive effects, and novel oncostatic and immunosuppressive agents.
通式(I)代表的具有抗风湿和免疫抑制作用的新型异黄酮衍生物及其盐类,以及新型抗风湿和免疫抑制剂。
COMPOSITION USEFUL FOR PRODUCTION OF ACIDIC GAS SEPARATION MEMBRANE
申请人:SUMITOMO CHEMICAL COMPANY LIMITED
公开号:EP3862072A1
公开(公告)日:2021-08-11
The present invention provides a composition comprising an organic compound having an acid dissociation constant in a 25°C aqueous solution of 5.0 to 15.0, a hydrophilic resin, and a basic compound, wherein a content of the organic compound is 30 to 1,000 parts by weight per 100 parts by weight of the hydrophilic resin.