Enantioselective C–H Lactonization of Unactivated Methylenes Directed by Carboxylic Acids
作者:Marco Cianfanelli、Giorgio Olivo、Michela Milan、Robertus J. M. Klein Gebbink、Xavi Ribas、Massimo Bietti、Miquel Costas
DOI:10.1021/jacs.9b12239
日期:2020.1.22
hydroxylation product. Here we show that a Mn-catalyzed CH oxidation directed by carboxylicacids can overcome these challenges to yield γ-lactones in high enantiomeric excess (up to 99%) using hydrogen peroxide as oxidant and a Brønsted acid additive under mild conditions and short reaction times. Coordination of the carboxylicacid group to the bulky Mn complex ensures the rigidity needed for high enantioselectivi-ty
Bicycloheteroaryl Compounds as P2X7 Modulators and Uses Thereof
申请人:Kelly G Michael
公开号:US20080039478A1
公开(公告)日:2008-02-14
Bicycloheteroaryl compounds are disclosed that have a formula represented by the following:
The compounds may be prepared as pharmaceutical compositions, and may be used for the prevention and treatment of a variety of conditions in mammals including humans, including by way of non-limiting example, pain, inflammation, traumatic injury, and others.