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.