A new access to isoindolo[2,1-b][2,4]benzodiazepines through an N-acyliminium ion amide cyclization
Résumé
Isoindolo[2,1-b][2,4]benzodiazepines 11a-c were synthesized from hydroxylactam-acid 5 when it was treated successively with thionyl chloride, ammonia (or an alkylamine) and p-toluenesulfonic acid. (C) 1997 Elsevier Science Ltd.
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