Studies on the Stereoselective Synthesis of the Marine Antitumor Agent Eleutherobin
作者:Rich Carter、Kevin Hodgetts、Jeff McKenna、Philip Magnus、Stephen Wren
DOI:10.1016/s0040-4020(00)00309-4
日期:2000.6
14 to the aldehyde 21, followed by oxidation, dissolving metal reduction and stereoselective reduction of the C8 carbonyl group resulted in 29, which has the correct stereochemistry at C8 and C9. Further conversion of 29 into 37, and attempted intramolecular cyclization resulted in fragmentation to the furan 39 and 38. Asymmetric epoxidation of the allylic alcohols 42 and 48 resulted in neighboring
(+) -香芹酮已被转换成砜14,其包括细胞毒性的倍半萜的左手侧,eleutherobin 1。朱莉娅将14与醛21偶联,然后进行氧化,溶解金属并将其立体选择性还原为C8羰基,得到29,该化合物在C8和C9处具有正确的立体化学。29进一步转化为37,并尝试进行分子内环化,导致呋喃39和38断裂。烯丙醇42和48的不对称环氧化导致从相邻的二甲氧基乙缩醛和形成重排的氧杂环庚烷衍生物的邻基参与44,45和49分别。