Total Synthesis of the Fumiquinazoline Alkaloids: Solution-Phase Studies<sup>1</sup>
作者:Haishan Wang、A. Ganesan
DOI:10.1021/jo9914364
日期:2000.2.1
Biomimetic total syntheses of glyantrypine, fumiquinazoline F, fumiquinazoline G, and fiscalin B were achieved in four steps from tryptophan methyl ester. In the key step, the anthranilamide residue in a linear tripeptide is dehydrated to a benzoxazine by reaction with triphenylphosphine, iodine, and a tertiary amine. The benzoxazines subsequently undergo rearrangement to the natural products via an amidine
从色氨酸甲酯通过四个步骤实现了仿生的喹硫平,氟喹唑啉F,氟喹唑啉G和紫杉醇B的仿生总合成。在关键步骤中,线性三肽中的邻氨基苯甲酰胺残基通过与三苯基膦,碘和叔胺反应而脱水成苯并恶嗪。苯并恶嗪随后经由an中间体经历重排成天然产物。该脱水恶嗪至喹唑啉的路线适用于广泛的N-酰基蒽酰胺,包括空间受阻的情况。