作者:Prashant P. Deshpande、Kenneth N. Price、David C. Baker
DOI:10.1021/jo951602h
日期:1996.1.1
Optically pure enone 9c, available in three steps from known 6-deoxy D-galactal derivative 7b, reacts with cyanophthalide 6 to directly afford the natural product (-)-hongconin (1), a compound from traditional Chinese medicine recently shown to exhibit antianginal activity. The enantiomer of 1 and its (+)-cis-diastereomer were also synthesized in a parallel fashion from the L-sugar counterpart. The
从已知的6-脱氧D-半乳糖衍生物7b分三步得到的光学纯的烯酮9c与氰基邻苯二甲酸酯6反应,可直接提供天然产物(-)-hongconin(1),这是一种来自中药的化合物,最近被证明具有抗心绞痛的作用活动。1的对映异构体及其(+)-顺式-非对映异构体也以平行方式由L-糖对应物合成。使用C-糖苷Michael受体而不是O-糖苷对应物,代表了邻苯二甲酸酯环化方法在合成许多其他此类光学纯的异色蒽醌中的潜在有用简化方法,因为它避免了相关合成方案后期的额外步骤带来的不便将剩余的乙缩醛部分还原操作成所需的吡喃环取代基。