340291-81-8Relevant articles and documents
Total synthesis of asperlicin C, circumdatin F, demethylbenzomalvin A, demethoxycircumdatin H, sclerotigenin, and other fused quinazolinones
Tseng, Ming-Chung,Yang, Huei-Yun,Chu, Yen-Ho
experimental part, p. 419 - 427 (2010/02/16)
Using scandium triflate and microwaves, the direct double dehydrocyclization of anthranilate-containing tripeptides was achieved, affording the total syntheses of (i) quinazolino[3,2-a]benzodiazepinediones (1a-f), (ii) diazepino[2,1-b]quinazolinediones (2a-e), and (iii) pyrazino[2,1-b]quinazolinediones (3a-e) with good overall isolated yields (23-43%, 37-47% and 31-56%, respectively). Among the quinazolino[3,2-a] benzodiazepinediones synthesized, 1a (sclerotigenin), 1b (circumdatin F), and 1f (asperlicin C) are natural products.
Total syntheses of the benzodiazepine alkaloids circumdatin F and circumdatin C
Witt,Bergman
, p. 2784 - 2788 (2007/10/03)
Total syntheses of circumdatin F and circumdatin C, which both possess a 3H-quinazolin-4-one as well as a 1,4-benzodiazepin-5-one moiety, are described. A tripeptide derivative was synthesized as a key intermediate and dehydrated to a benzoxazine by react
