An enantioselective synthesis of (+)-bostrycin leading to a revision of the absolute configuration of its natural antipode
作者:David S. Larsen、Richard J. Stoodley
DOI:10.1016/s0040-4020(01)85591-5
日期:1990.1
D-glucose-derived diene (9a), is used to assemble compound (22), which is transformed by way of compounds (26), (27) and (28) into (+)-bostrycin (3). An X-ray analysis of compound (28) confirms that (+)-bostrycin possesses the stereostructure (3) and, therefore, that (-)-bostrycin is its antipode, i.e. (2). The use of naphthazarin (14a) and juglone (14c) as dienophiles in the Diels-Alder reaction enables the
涉及受保护的萘嘌呤(4)和D-葡萄糖衍生的二烯(9a)的不对称Diels-Alder反应用于组装化合物(22),该化合物通过化合物(26),(27)和(28)转化为(+)-波司霉素(3)。化合物(28)的X射线分析证实(+)-波士霉素具有立体结构(3),因此,(-)-波士霉素是其对映体,即(2)。萘沙林(14a)和朱胶酮(14c)的使用)作为Diels-Alder反应中的亲二烯体,可以实现(+)-脱甲氧基Bostrycin(12a)和(+)-脱甲氧基5-deoxybostrycin(12b)的合成。