A highly efficient asymmetric conjugate addition of methylmagnesium bromide (MeMgBr) to α,β-unsaturated esters catalyzed by copper(I) iodide-tolyl-BNIP (CuI-Tol-BINAP) is described.
The reactivity of carbenes from photolysis of diazo-compounds towards carbon–hydrogen bonds. Effects of structure, temperature, and matrix on the insertion selectivity
Direct and/or sensitizedphotolyses of diazo-acetate (1a) and -malonate (1b) in hydrocarbons and ether were investigated at various temperatures in order to learn more about the nature of the C–H insertion process and the structural factors governing positional selectivity within the matrix. Photolysis of the diazo-compounds in a rigid matrix resulted in a marked decrease in the insertion selectivity
Disclosed herein are novel prostaglandin I.sub.2 (PGI.sub.2) derivatives exhibiting excellent in vivo duration and activities, said derivatives being represented by the general formula: ##STR1## wherein R.sub.1, X, R.sub.2 and R.sub.3 are as defined herein.
The present invention provides compounds of Formula (Ia): or stereoisomers, tautomers, or pharmaceutically acceptable salts thereof, wherein all the variables are as defined herein. These compounds are selective factor XIa inhibitors or dual inhibitors of FXIa and plasma kallikrein. This invention also relates to pharmaceutical compositions comprising these compounds and methods of treating thromboembolic and/or inflammatory disorders using the same.