Synthesis of Manool-Related Labdane Diterpenes as Platelet Aggregation Inhibitors.
作者:Ken YASUI、Kenji KAWADA、Kiyomi KAGAWA、Katsuya TOKURA、Kengo KITADOKORO、Yuji IKENISHI
DOI:10.1248/cpb.41.1698
日期:——
Enantioselective total synthesis of the labdane diterpene (-)-1, was achieved starting from the R-(-)-enantiomer of the Wieland-Miescher ketone. The enantiomer (+)-1 was obtained by partial synthesis via microbial transformation of sclareol. These results established that the natural compound (+)-1, a platelet aggregation inhibitor, has a normal absolute stereochemistry like that of manool. The B-norlabdane-related
从Wieland-Miescher酮的R-(-)-对映异构体开始,实现了拉丹烷二萜(-)-1的对映选择性全合成。对映异构体(+)-1是通过香紫苏醇的微生物转化通过部分合成获得的。这些结果证实了天然化合物(+)-1,一种血小板凝集抑制剂,具有正常的绝对立体化学,如甘露醇。还使用新型的环收缩反应合成了B-去甲丹烷相关的化合物44。