In the chemistry of squaric acid, we find first that 1,3- diaryl iso - squarylium amide can react with HMPA and other carboxylic amides.

• 研究了1,3-双芳基异方酰胺与六甲基磷酰三胺(HMPA)及其它羧酰胺的反应制得了15个既含芳胺基又含脂肪基的不对称方酰胺。