Synthetic studies on altohyrtins (spongistatins): synthesis of the C29–C44 (EF) portion
作者:Takeshi Terauchi、Masataka Morita、Kyoko Kimijima、Yasuhiro Nakamura、Gouichirou Hayashi、Taisaku Tanaka、Naoki Kanoh、Masaya Nakata
DOI:10.1016/s0040-4039(01)01069-3
日期:2001.8
C29–C44 portion of altohyrtins (spongistatins) has been prepared from 1,5-pentanediol and d-glucose in a stereoselective manner. The convergent synthesis relied on a coupling reaction of the C29–C37 vinyl bromide and the C38–C44 Weinreb amide, diastereoselective reduction of the C38 ketone, and stereoselective formation of the C33–C37 (E ring) acetal.
Altohyrtins(海绵抑素)的C29-C44部分是由1,5-戊二醇和d-葡萄糖以立体选择性方式制备的。收敛合成依赖于C29–C37乙烯基溴与C38–C44韦氏酰胺的偶联反应,C38酮的非对映选择性还原以及C33–C37(E环)乙缩醛的立体选择性形成。