CsF-Mediated in Situ Desilylation of TMS-Alkynes for Sonogashira Reaction
作者:Joseph S. Capani、John E. Cochran、Jianglin (Colin) Liang
DOI:10.1021/acs.joc.9b01307
日期:2019.7.19
A practical and mild set of conditions for the Sonogashirareaction utilizing CsF-mediated in situ TMS-alkyne desilylation followed by Sonogashira coupling has been developed for the synthesis of a variety of alkynyl benzenes and heteroarenes in good to excellent yields. This methodology demonstrates excellent functional group tolerance and simple purification, which allows large-scale industrial applications
Regio- and Stereoselective Radical Perfluoroalkyltriflation of Alkynes Using Phenyl(perfluoroalkyl)iodonium Triflates
作者:Xi Wang、Armido Studer
DOI:10.1021/acs.orglett.7b01215
日期:2017.6.2
A method for regio- and stereoselective anti-addition of the perfluoroalkyl and the triflate group of phenyl(perfluoroalkyl)iodonium triflates to alkynes is presented. The radical reaction uses cheap CuCl as a smart initiator and can be conducted in gram scale. The perfluoroalkyltriflated products are readily further functionalized, rendering this transformation valuable.
The present invention provides to a compound having melanin-concentrating hormone receptor antagonistic action and low toxicity, and useful as a agent for the prophylaxis or treatment of obesity and the like.
The present invention relates to a compound represented by the formula (I):
wherein each symbol is as defined in the specification, or a salt thereof.