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
Flavones. 3. Synthesis, biological activities, and conformational analysis of isoflavone derivatives and related compounds
作者:Edwin S. C. Wu、James T. Loch、Bruce H. Toder、Alfonso R. Borrelli、Daniel Gawlak、Lesley A. Radov、Nigel P. Gensmantel
DOI:10.1021/jm00097a009
日期:1992.9
antihypertensive activity of these compounds appears to have a slow onset and long duration. None of the analogs appears better than the corresponding flavone (3) and 3-phenylflavone (2) analogs. An unsuccessful attempt to correlate the relationship between antihypertensive activity and the calculated torsional angle of C2-C3-C1'-C2' is discussed. Antiinflammatory activities of these compounds along with 7-(oxypropylamine)flavones
Chromone derivatives such as 7-(3-amino-2-hydroxypropoxy)-3-phenylchromones which are useful for preparing other chemical compounds and for pharmaceutical uses such as antihypertensive and anti-inflammatory agents.