Ytterbium triflate promoted synthesis of 1,5-benzodiazepine derivatives
摘要:
2,3-Dihydro-1H-1.5 benzodiazepines have been synthetized in very good yield in solv ent-free conditions from o-phenylendiamine and ketones in the presence of Yb(OTf)(3) as catalyst. The method is applicable to both cyclic or acyclic ketones without significant differences. (C) 2001 Elsevier Science Ltd. All rights reserved.