Described herein is the enantioselective synthesis of multisubstituted biaryl derivatives by chiral phosphoric acidcatalyzed asymmetric bromination. Two asymmetric reactions (desymmetrization and kineticresolution) proceeded successively to afford chiral biaryls in excellent enantioselectivities (up to 99% ee). Both experimental and computational studies suggested that this excellent selectivity
Ni-Catalyzed Cycloisomerization between 3-Phenoxy Acrylic Acid Derivatives and Alkynes via Intramolecular Cleavage and Formation of the C–O Bond To Give 2,3-Disubstituted Benzofurans
based on transition-metal-catalyzed C-Obondcleavage have attracted much attention as a new synthetic method. Until now, several intermolecular reactions via C-Obondcleavage of aryl ethers, alkenyl ethers, esters, and others have been reported. Here we report an unprecedented C-Obondcleavage of 3-phenoxy acrylic acid derivatives, followed by intramolecular C-Obond formation with alkynes. This reaction
Hsp90 C-terminal inhibitors and pharmaceutical compositions containing such compounds are provided. The compounds of the disclosure are useful for the treatment and/or prevention of neurodegenerative disorders such as diabetic peripheral neuropathy.
Hsp90 C-terminal inhibitors and pharmaceutical compositions containing such compounds are provided. The compounds of the disclosure are useful for the treatment and/or prevention of neurodegenerative disorders such as diabetic peripheral neuropathy.
An enantioselective synthesis of (S)- and (R)-curcuphenol
作者:Jiangping Lu、Xingang Xie、Bo Chen、Xuegong She、Xinfu Pan
DOI:10.1016/j.tetasy.2005.03.005
日期:2005.4
The enantioselective synthesis of the phenolic sesquiterenses (S)- and (R)-curcuphenol is reported. The key step in this synthesis is the asymmetric conjugate addition using a readily available enantionterically pure sulfoxide as the chiral auxiliary. (c) 2005 Elsevier Ltd. All rights reserved.