作者:Anette Witt、Jan Bergman
DOI:10.1021/jo001696h
日期:2001.4.1
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 reaction with triphenylphosphine, iodine, and a tertiary amine. The natural products were attained via rearrangements to an amidine intermediate, deprotection
描述了同时具有3H-喹唑啉-4-酮和1,4-苯并二氮杂-5-酮部分的环他汀F和环他汀C的总合成。合成了三肽衍生物作为关键中间体,并通过与三苯基膦,碘和叔胺反应脱水成苯并恶嗪。天然产物是通过重排成intermediate中间体,用45%HBr的乙酸去保护基和在硅胶上环化获得的。