Synthesis of 2H-1-Benzopyrans by Pd-Catalyzed Cyclization of <i>o</i>-Allylic Phenols
作者:Richard C. Larock、Lulin Wei、Timothy R. Hightower
DOI:10.1055/s-1998-1709
日期:1998.5
Derivatives of 2H-1-benzopyran (1), also known as chromenes, are prominent natural products of many genera of the Asteraceae possessing a wide range of valuable physiological activities. They are also useful intermediates in the synthesis of complex natural products, such as pterocarpans.
Pd-catalyzed oxidative cross-coupling of N-tosylhydrazones with arylboronic acids
作者:Xia Zhao、Jing Jing、Kui Lu、Yan Zhang、Jianbo Wang
DOI:10.1039/b925590g
日期:——
The Pd-catalyzed reaction of N-tosylhydrazones and arylboronic acids provides olefin derivatives. This oxidative cross-coupling is suggested to proceed through a migratory insertion process of a Pd carbene intermediate.
N-phenylamide and N-pyridylamide derivatives, method of preparing them and pharmaceutical compositions containing them
申请人:Merck Patent GmbH
公开号:US06339097B1
公开(公告)日:2002-01-15
The present invention relates to the compounds of formula (I) in which X, R1, R2 and R3 are as defined in claim 1. These compounds are cholesteryl acyl transferase (ACAT) inhibitors.
the generality of gold versus silver catalyzed intramolecular hydroarylation reactions of 3-[(3-arylprop-2-ynyl)oxy]benzenederivatives in terms of rings substitution were investigated. Only products deriving from 6-endo cyclization were exclusively formed. The features of substituents had a considerable effect on the reaction outcome in the presence of silver catalysis, whereas gold catalysis revealed