Synthetic studies on antibiotic validamycins. Part 12. Total synthesis of (+)-validamycin B and (+)-validoxylamine B
作者:Seiichiro Ogawa、Yasunobu Miyamoto、Taisuke Nose
DOI:10.1039/p19880002675
日期:——
The first complete synthesis of validamycin B (1a) and validoxylamine B (2a) is reported; coupling of the epoxide (12) and the partially protected derivative (16) of (+)-valienamine, followed by deprotection, gives (1a), which was identified from the 1H n.m.r. spectrum of its totally O-acetylated derivative (1b). Alternatively, coupling of the epoxide (24) with the amine (16) affords compound (25)
报告了有效霉素B(1a)和有效羟胺B(2a)的第一个完整合成;(+)-valienamine的环氧化物(12)与部分受保护的衍生物(16)偶联,然后脱保护,得到(1a),从其全部O-乙酰化衍生物(1b)的1 H nmr光谱中鉴定。或者,将环氧化物(24)与胺(16)偶合,得到化合物(25),其结构可通过将(25)转化为有效氧胺B壬酸-O-乙酸酯(2b)。将衍生自(25)的经过适当保护的胺(29)糖基化,然后脱保护和乙酰化,得到(1b)。
OGAWA, SEIICHIRO;MIYAMOTO, YASUNOBU, J. CHEM. SOC. CHEM. COMMUN.,(1987) N 24, 1843-1844