作者:María Ruiz、Vicente Ojea、JoséMa Quintela
DOI:10.1016/0040-4039(96)01173-2
日期:1996.8
Optically pure (+)-elsaminose (2), the amino sugar contained in the antitumour antibiotic elsamicin A, has been synthesized in eight steps (26% overall yield) from known building blocks derived from glycine, L-valine, and L-threonine. Direct and selective construction of the key intermediate 6, with the complete backbone and the proper stereochemical configuration, is accomplished by a syn-aldol type
光学纯净的(+)-艾氨糖胺(2)是抗肿瘤抗生素艾素霉素A中所含的氨基糖,它是通过八步(总收率26%)从甘氨酸,L-缬氨酸和L-苏氨酸衍生而来的合成原料合成的。直接和关键中间体的选择性结构6,与完整的主链和适当的立体化学构型,是通过完成顺-aldol型反应锂化Schöllkopf的bislactime醚之间5和1,3-二氧戊环-4-甲醛( - ) - 3。