Reissert-type reaction of N-sulfonyl- or N-acyl-phthalazinium salts with trimethyl phosphite and crystal structure of dimethyl 2-mesyl-1,2-dihydro-1-phthalazinylphosphonate.

Abstract

Dimethyl 2-sulfonyl- and 2-acyl-1, 2-dihydro-1-phthalazinylphosphonates (1a-e) were synthesized by the reaction of phthalazine with sulfonyl chloride or acyl chloride and trimethyl phosphite. The crystal structure of 1a was determined by X-ray analysis.