copper-catalyzed coupling reaction of 2-pyridinesulfonates with Grignardreagents revealed that reactions with catalytic Cu(OTf)2 were completed in <40 min. The results differed from those of the previous CuI-catalyzed reactions of tosylates in the presence of additives (LiOMe and TMEDA) for 12–24 h. It was shown that the preferred coordination of the leaving group to the reagents accelerated the reaction
The Stereoselective Reductions of Ketones to the Most Thermodynamically Stable Alcohols Using Lithium and Hydrated Salts of Common Transition Metals
作者:Nicole Kennedy、Theodore Cohen
DOI:10.1021/acs.joc.5b01232
日期:2015.8.21
A simple method is presented for the highly stereoselective reductions of ketones to the most thermodynamically stable alcohols. In this procedure, the ketone is treated with lithium dispersion and either FeCl2·4H2O or CuCl2·2H2O in THF at room temperature. This protocol is applied to a large number and variety of ketones and is both more convenient and efficient than those commonly reported for the
Nuclear magnetic resonance spectroscopy. Carbon-13 chemical shifts of methycyclopentanes, cyclopentanols, and cyclopentyl acetates
作者:John D. Roberts、Manfred Christl、Hans J. Reich
DOI:10.1021/ja00743a028
日期:1971.7
The ^(13)C chemicalshifts of the title compounds have been determined by high-resolution nmr spectroscopy with the aid of proton decoupling. Substituent effects have been computed and compared to those obtained for some corresponding cyclohexane compounds, with the hope of providing information about steric interactions and conformations of cyclopentane derivatives. Rather large downfield ɑ (up to
SYNTHESIS OF POLYCYCLIC-CARBAMOYLPYRIDONE COMPOUNDS
申请人:Gilead Sciences, Inc.
公开号:US20180022757A1
公开(公告)日:2018-01-25
Methods of making compounds of Formula I are disclosed:
公开了制备式I化合物的方法。
DERIVATIVES OF N-(ARYLAMINO) SULFONAMIDES AS INHIBITORS OF MEK
申请人:Maderna Andreas
公开号:US20080058340A1
公开(公告)日:2008-03-06
This invention concerns N-(2-arylamino) aryl sulfonamides, which are inhibitors of MEK and are useful in treatment of cancer and other hyperproliferative diseases.