Diastereoselective nitrilimine cycloaddition to the CN bond of enantiopure 1,4-benzodiazepinones
摘要:
Enantiopure 1,4-benzodiazepin-4-one 1 and 1,4-benzodiazepin-6-ones 2 were reacted with hydrazonoyl chloride 8 in the presence of various basic agents. The diastereoselective 1,3-dipolar cycloaddition between the C=N double bond of 1 or 2 and the nitrilimine intermediate 9 gave the enantiopure [1,2,4]triazolo[4,3-a][1,4]benzo diazepinones 10-13. (C) 2002 Elsevier Science Ltd. All rights reserved.
Diastereoselective nitrilimine cycloaddition to the CN bond of enantiopure 1,4-benzodiazepinones
摘要:
Enantiopure 1,4-benzodiazepin-4-one 1 and 1,4-benzodiazepin-6-ones 2 were reacted with hydrazonoyl chloride 8 in the presence of various basic agents. The diastereoselective 1,3-dipolar cycloaddition between the C=N double bond of 1 or 2 and the nitrilimine intermediate 9 gave the enantiopure [1,2,4]triazolo[4,3-a][1,4]benzo diazepinones 10-13. (C) 2002 Elsevier Science Ltd. All rights reserved.