The intramolecular Baylis–Hillman reaction: easy preparation of versatile substrates, facile reactions, and synthetic applications
作者:Jung Eun Yeo、Xiuling Yang、Hee Jin Kim、Sangho Koo
DOI:10.1039/b311951c
日期:——
We have developed a general and highly efficient method for the preparation of diverse [small omega]-formyl-[small alpha],[small beta]-unsaturated carbonyl compounds and optimized the conditions for the intramolecular Baylis-Hillman reactions of these compounds to provide various biologically important polycyclic compounds.
Influence of Michael Acceptor Stereochemistry on Intramolecular Morita−Baylis−Hillman Reactions
作者:Wen-Dong Teng、Rui Huang、Cathy Kar-Wing Kwong、Min Shi、Patrick H. Toy
DOI:10.1021/jo051802l
日期:2006.1.1
A study of the effect of Michael acceptor stereochemistry on the efficiency of intramolecular Morita−Baylis−Hillman (MBH) reactions has been performed. The reactions were catalyzed by a phosphine, and the reaction substrates studied were enones containing a pendant aldehyde moiety attached at the β-position of the alkene group. In all cases examined with PPh3 as the catalyst, cyclization substrates
New organofluorine building blocks: inhibition of the malarial aspartic proteases plasmepsin II and IV by alicyclic α,α-difluoroketone hydrates
作者:Christoph Fäh、Leo A. Hardegger、Lukas Baitsch、W. Bernd Schweizer、Solange Meyer、Daniel Bur、François Diederich
DOI:10.1039/b908489d
日期:——
therapeutic agents againstmalaria has become urgent during the past few decades, due to an increased prevalence of drug-resistant strains of malaria-causing Plasmodium parasites. Possible targets are the hemoglobin-degrading asparticproteases, the plasmepsins. While acyclic α,α-difluoroketone hydrates have been introduced into peptidomimetics to bind to the catalytic Asp dyad of asparticproteases, alicyclic
Perhydroisoindole derivatives as substance P antagonists
申请人:Rhone-Poulenc Rorer S.A.
公开号:US05624950A1
公开(公告)日:1997-04-29
Perhydroisoindole derivatives of formula I, wherein the substituents are as defined in the specification, are particularly suitable as substance P antagonists. Several processes for preparing the compounds are also taught. ##STR1##
α′-acetoxy α,β-unsaturated cyclopentanone and cyclohexanone have been resolved into the corresponding enantiomericallyenriched α′-hydroxylated and acetoxylated compounds with 96–97% ee via PLE hydrolysis. Stereoselectivity in the palladium(II)-catalyzed reaction between the enantiomericallyenriched α′-acetoxylated compounds and diazomethane has been investigated. In the α′-acetoxylated cyclopentenone