One-pot synthesis of 3-hydroxymaleic anhydrides by cyclization of 1,1-bis(trimethylsilyloxy)ketene acetals with oxalyl chloride
摘要:
Functionalized 3-hydroxymaleic anhydrides were prepared by cyclization of 1, 1-bis(trimethylsilyloxy)ketene acetals with oxalyl chloride. (c) 2007 Elsevier Ltd. All rights reserved.
Palladium-Catalyzed α-Arylation of Carboxylic Acids and Secondary Amides via a Traceless Protecting Strategy
作者:Zhi-Tao He、John F. Hartwig
DOI:10.1021/jacs.9b03291
日期:2019.7.31
for the long-standing challenge of conducting the palladium-catalyzed α-arylation of carboxylic aids and secondaryamides with aryl halides. Both of the presented coupling processes occur with a variety of carboxylic acids and amides and with a variety of aryl bromides containing a broad range of functional groups, including base-sensitive functionality like acyl, alkoxycarbonyl, nitro, cyano, and even
1,4-Diaza-7-oxabicyclo [4.3.0] non-2-en-6-ones were prepared by cyclization of 1,1-bis(trimethylsiloxy)ketene acetals with pyrazine and quinoxaline. (c) 2006 Elsevier Ltd. All rights reserved.