Cycloaddition in synthesis of sulfonamide derivatives. II. Synthesis of N-arylsulfonylethoxalamides by cycloaddition of arylsulfonyl isocyanates to ethyl oxamates.
Cycloaddition in synthesis of sulfonamide derivatives. II. Synthesis of N-arylsulfonylethoxalamides by cycloaddition of arylsulfonyl isocyanates to ethyl oxamates.
TAMURA, HIROTO;IWAKAWA, TSUNEO;HAYASE, YOSHIO, CHEM. AND PHARM. BULL., 38,(1990) N, C. 1069-1071
作者:TAMURA, HIROTO、IWAKAWA, TSUNEO、HAYASE, YOSHIO
DOI:——
日期:——
Cycloaddition in synthesis of sulfonamide derivatives. II. Synthesis of N-arylsulfonylethoxalamides by cycloaddition of arylsulfonyl isocyanates to ethyl oxamates.
作者:Hiroto TAMURA、Tsuneo IWAKAWA、Yoshio HAYASE
DOI:10.1248/cpb.38.1069
日期:——
A new class of sulfonamides, N2-arylsulfonyl-N1, N1-disubstituted ethoxalamidines, was synthesized by reaction of arylsulfonyl isocyanates with N, N-disubstituted ethyl oxamates. It was suggested that the reacion might proceed through [2+2] cycloaddition of the isocyanates to an amide carbonyl moiety with high selectivity.