Process for the preparation of enamines according to formula
wherein R1 = (substituted) alkyl, aryl, alkaryl or aralkyl and R2 = H, Hal, R1, R1SO2 or CN or R1 and R2 together form part of a ring system containing at least 3 carbon atoms, by reacting a compound according to formula
with a hydride-type reducing agent, in particular LiAlH4 or NaBH4. The enamines (some of which are novel) can be used for the preparation of interesting chemicals, e.g. novel dihydropyridines by reacting enamines wherein R2=H with β-unsaturated ketones such as chalcone.
制备烯胺的工艺,其中 R1 =(取代的)烷基、芳基、烷芳基或芳烷基,R2 = H、Hal、R1、R1SO2 或 CN,或 R1 和 R2 共同构成至少含 3 个碳原子的环系统的一部分,其方法是使符合式的化合物与
氢化物型还原剂(尤其是 LiAlH4 或 NaBH4)反应。 这些烯胺(其中一些是新型的)可用于制备有趣的
化学品,例如通过使 R2=H 的烯胺与β-不饱和酮(如
查尔酮)反应制备新型
二氢吡啶。