作者:Toshio Honda、Satomi Horiuchi、Hirotake Mizutani、Kazuo Kanai
DOI:10.1021/jo960267+
日期:1996.1.1
(+)-Boronolide 1, a sigma-lactonic polyacetoxy natural product isolated from the bark and branches of Tetradenia fruticosa and from the leaves of Tetradenia barberae, has been stereoselectively synthesized, the key steps being the chemoselective Sharpless asymmetric dihydroxylation of (E)-1-(tert-butyldimethylsiloxy)-7-dodecen-5-yne (6), Lindlar reduction of the triple bond of diacetate 9, and further diastereoselective dihydroxylation of the resulting cis-olefin 5.
(+) - 硼烷环 1是一种从Tetradenia fruticosa的树皮和树枝以及Tetradenia barberae的叶子中分离出来的σ-内酯型多乙酰氧基天然产物,已通过不对称合成法成功合成。关键步骤包括(E)-1-(叔丁基二甲基硅氧基)-7-十二碳炔-5-烯(6)的化学选择性Sharpless 不对称二羟基化,二乙酸酯9中三键的Lindlar 还原,以及由此得到的顺式烯烃5的进一步对映选择性二羟基化。