Acylation of aromatic amines 1 with diisopropyl malonate (2) leads to a mixture of isopropyl N-arylmalonamates 3 and malonanilides 4. The reaction of 3 with carbon disulfide in the presence of sodium hydride gives disodium salts 5. Treatment of 5 with an alkylating agent yields the open-chain or cyclic ketene dithioacetals 6, 7 or 8. The molecular structure, hydrogen bonding and preferential conformation of the isopropyl N-arylmalonamates 3, 6 and 7 were investigated using correlation analyses of IR, 13C NMR and AM1 semiempirical data.
芳香胺与二异丙基丙二酸酯(2)发生酰基化反应,得到异丙基N-芳基丙二酰胺(3)和马隆酰苯胺(4)的混合物。将3与二硫化碳在氢化钠存在下反应,得到二钠盐(5)。用烷基化剂处理5,得到开链或环状酮二硫乙醇(6、7或8)。通过对异丙基N-芳基丙二酰胺(3、6和7)的分子结构、氢键和偏好构象的相关分析,研究了其红外、13C核磁共振和AM1半经验数据。