Biomimetic syntheses of pretetramides. 2. A synthetic route based on a preformed D ring
作者:Thomas M. Harris、Constance M. Harris、Timothy A. Oster、Larry E. Brown、John Y. C. Lee
DOI:10.1021/ja00226a037
日期:1988.8
pretetramides has been developed on the basis of tandem condensations of homophthalate esters with the dianion of methyl acetoacetate to give aromatic bis(diketo esters), which cyclize spontaneously to anthracene diesters. A further condensation of one of the ester groups with acetamide synthons gives anthracene ester-keto amides, which can be cyclized to naphthacenecarboxamides. By this technique dimethyl