Synthesis of N 1-alkyl-1,4-diazepin-5-ones via Schmidt ring expansion chemistry
摘要:
Reaction of 4-piperidone with alkyl bromides gave the corresponding N-alkyl-4-piperidones, and treatment of these with hydrazoic acid resulted in the Schmidt reaction to give the corresponding N-1-alkyl-1,4-diazepin-5-ones in good overall yields.