Highly Regioselective Palladium-Catalyzed Direct Arylation of Oxazole at C-2 or C-5 with Aryl Bromides, Chlorides, and Triflates
作者:Neil A. Strotman、Harry R. Chobanian、Yan Guo、Jiafang He、Jonathan E. Wilson
DOI:10.1021/ol1011778
日期:2010.8.20
Complementary palladium-catalyzed methods for directarylation of oxazole with high regioselectivity (>100:1) at both C-5 and C-2 have been developed for a wide range of aryl and heteroaryl bromides, chlorides, iodides, and triflates. C-5 arylation is preferred in polar solvents with phosphines 5 or 6, whereas C-2 arylation is preferred by nonpolar solvents and phosphine 3. This represents the first
streptochlorin analogues in which indole has been replaced by other heterocycles has been designed and synthesized, as a continuation of our studies aimed at the discovery of novel streptochlorin analogues with improved antifungalactivity. Biological testing showed that most of the indole-replaced streptochlorin analogues were inactive, though compound 6f had a broad spectrum of antifungalactivity with significant
PROCESS FOR THE PRODUCTION OF SUBSTITUTED 5-QUINOLYL-OXAZOLES AND PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF
申请人:Schering Corporation
公开号:EP2178867A1
公开(公告)日:2010-04-28
[EN] PROCESS FOR THE PRODUCTION OF SUBSTITUTED 5-QUINOLYL-OXAZOLES AND PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF<br/>[FR] PROCÉDÉ DE PRODUCTION DE 5-QUINOLYL-OXAZOLES SUBSTITUÉS ET SELS PHARMACEUTIQUEMENT ACCEPTABLES DE CEUX-CI
申请人:SCHERING CORP
公开号:WO2009009003A1
公开(公告)日:2009-01-15
The present invention relates a process for the preparation of a compound of the following formula, wherein R1, R2, R6, R9 and R10 are as described herein. The compounds are inhibitors of phosphodiesterase 4 (PDE4).