1,3-Dipolar cycloaddition of chalcones and arylidene-1,3-dicarbonyls with diazosulfone for the regioselective synthesis of functionalized pyrazoles and pyrazolines
A convenient method for the synthesis of 3-acylpyrazoles and pyrazole-3-carboxylates using diazosulfone as a reactive 1,3-dipole and a diazomethane equivalent is reported here. Chalcones, arylidenemalonates and other arylidene-1,3-dicarbonyls performed we
REACTION OF TRIMETHYLSILYLDIAZOMETHANE WITH OLEFINS
Most of the reactions of trimethylsilyldiazomethane with various olefins in the presence or absence of metal salt catalysts give silylcyclopropanes.KEYWORDS - trimethylsilyldiazomethane; olefin; cyclopropanation; 1,3-dipolar cycloaddition; silylcyclopropane; pyrazoline; pyrazole