The catalytic, nucleophilic enantioselective trifluoromethylation reaction of both acyclic and cyclic aryl ketones using the Ruppert-Prakash reagent is now at hand, with an operationally simple procedure, based on the combination of ammonium bromide of cinchonaalkaloids with TMAF. The procedure is reliable and general. Trifluoromethyl-substituted tetrasubstituted aryl alcohols have been synthesized
Sulfonamide compounds as cysteine protease inhibitors
申请人:Woo Soon H.
公开号:US20090233909A1
公开(公告)日:2009-09-17
The present invention is directed to compounds of formula (I) that are inhibitors of cysteine proteases, in particular, cathepsins B, K, L, F, and S and are therefore useful in treating diseases mediated by these proteases. The present invention is directed to pharmaceutical compositions comprising these compounds and processes for preparing them. Wherein R3 is -alkylene-SO2NR5R6.
SULFONAMIDE COMPOUNDS AS CYSTEINE PROTEASE INHIBITORS
申请人:ViroBay, Inc.
公开号:EP1819667B1
公开(公告)日:2012-10-17
US8163735B2
申请人:——
公开号:US8163735B2
公开(公告)日:2012-04-24
Molecular and Merrifield supported chiral diamines for enantioselective addition of ZnR2 (R = Me, Et) to ketones
作者:Mercedes Calvillo-Barahona、Carlos Cordovilla、Miroslav N. Genov、Jesús M. Martínez-Ilarduya、Pablo Espinet
DOI:10.1039/c3dt51097b
日期:——
reported as active catalysts in the enantioselective addition reactions of ZnR2 to either methyl- or trifluoromethyl-ketones. Subtle changes in the molecular structure of different catalysts are described herein and lead to a dramatic effect in their catalyticactivity. From these findings, we demonstrate the selective reactivity of the ligands used in the addition of ZnR2 (R = Me, Et) to methyl- and tri