Total Syntheses of the Benzodiazepine Alkaloids Circumdatin F and Circumdatin C
作者:Anette Witt、Jan Bergman
DOI:10.1021/jo001696h
日期:2001.4.1
Total syntheses of circumdatinF 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 reaction with triphenylphosphine, iodine, and a tertiary amine. The natural products were attained via rearrangements to an amidine intermediate, deprotection