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.
display nanomolar activities against metalloproteases, only three hydroxamates have reached the market, among which is the HDAC inhibitor vorinostat. Failures in development are generally attributed to lack of selectivity, toxicity, or poor stability. To help medicinal chemists with respect to plasmastability, we have performed the first and preliminary study on structure−plasma stability for hydroxamates
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.