C,N-diarylnitrones and C-amido-N-arylnitrones add diastereoselectively to the substituted arylpropenones to give the substituted isoxazolidine possessing 3RS,4SR,5SR configuration. Replacement of the aryl groups either in the position 3 of chalcone or at the nitrogen atom of nitrone by the methyl group decreased the rate of cycloaddition.
C,N-二芳基硝腙和 C-脒基-N-芳基硝腙非对映地加到取代的芳基
丙烯酮中,得到具有 3RS、4SR、5SR 构型的取代的
异噁唑烷。用甲基取代
查尔酮第 3 位或腈酮氮原子上的芳基会降低环化反应的速率。