Synthesis of 1,1′-Diarylethanes and Related Systems by Displacement of Trichloroacetimidates with Trimethylaluminum
作者:Nivedita S. Mahajani、John D. Chisholm
DOI:10.1021/acs.joc.8b00027
日期:2018.4.6
Benzylic trichloroacetimidates are readily displaced by trimethylaluminum under Lewis acid promoted conditions to provide the corresponding methyl substitution product. This method is a convenient way to access 1,1′-diarylethanes and related systems, which play a significant role in medicinal chemistry, with a number of systems owing their biological activity to this functionality. Most benzylic substrates
Promoter free allylation of trichloroacetimidates with allyltributylstannanes under thermal conditions to access the common 1,1′-diarylbutyl pharmacophore
作者:Nivedita S. Mahajani、John D. Chisholm
DOI:10.1039/c8ob00687c
日期:——
found in many biologically active small molecules. To access these systems under mild conditions, the reaction of diarylmethyl trichloroacetimidates with allyltributylstannanes was explored. Simply heating allyltributylstannane with the trichloroacetimidate resulted in substitution of the imidate with an allyl group. Unlike other methods used to access these systems, no strong base, transition metal catalyst
This invention relates to class of compounds which are cysteine protease inhibitors, including but not limited to, inhibitors of cathepsins K, L, S and B. These compounds are useful for treating diseases in which inhibition of bone resorption is indicated, such as osteoporosis. They have the following structure: Formula (I).