Synthetic Studies of the 18-Membered Antitumor Macrolide, Tedanolide. 3. Stereocontrolled Synthesis of the C1-C12 Part via a Synthesis of the C1-C7 Fragment by a Mismatched but Efficient Sharpless Dihydroxylation and Its Coupling with the C8-C11 Fragment.
作者:Tomohiro MATSUSHIMA、Michiko MORI、Bao-Zhong ZHENG、Hiroshi MAEDA、Noriyuki NAKAJIMA、Jun-ichi UENISHI、Osamu YONEMITSU
DOI:10.1248/cpb.47.308
日期:——
The C1-C12 part (4) of tedanolide (1) was synthesized starting from methyl (R)-3-hydroxy-2-methylpropionate (11a) via a coupling between the C1-C7 aldehyde (6) and the C8-C11 iodoalkene (7a). For a synthesis of 6, a mismatched but highly efficient Sharpless dihydroxylation of the α, β-unsaturated ester (15) with AD-mix-α was successfully applied. Compound 7a was synthesized using hydrozirconation to the alkyne (32).
特达内酯(1)的 C1-C12 部分(4)是由 (R)-3- 羟基-2-甲基丙酸甲酯(11a)通过 C1-C7 醛(6)和 C8-C11 碘代烃(7a)之间的偶联合成的。为了合成 6,成功地使用了 AD-mix-α,对 α,β-不饱和酯(15)进行了不匹配但高效的 Sharpless 二羟基化反应。化合物 7a 是通过羟基锆化反应合成炔烃 (32)的。