Enantioselective route to a key intermediate in the total synthesis of ginkgolide B
作者:E.J. Corey、Ashvinikumar V. Gavai
DOI:10.1016/0040-4039(88)85121-9
日期:1988.1
An enantioselective route for the totalsynthesis of ginkgolide B, a potent antagonist of platelet activating factor, has been developed which is based on enantioselective reduction of enone 3 to the (R)-alcohol 5 and subsequent diastereoselective anti-SN2' displacement to form 7. Intermediate 7 was converted in several steps to tetracyclic lactone 2 which was obtained in optically pure form simply
已经开发了一种全合成银杏内酯B(一种有效的血小板活化因子拮抗剂)的对映选择性路线,该路线基于将烯酮3对映体选择性还原为(R)-醇5和随后的非对映选择性抗-S N 2'置换为。表格7。将中间体7分几步转化为四环内酯2,该四环内酯2仅通过重结晶就可以以光学纯的形式获得。
Process for the Preparation of Cyclopentanone Derivatives
申请人:Lem Jorge M.
公开号:US20080214859A1
公开(公告)日:2008-09-04
The present invention relates to the field of organic synthesis and more particularly to a new process for the preparation of an acetal derivative of an alkyl 3-oxo-2-(2-oxoethyl)-1-cyclopentaneacetate. The invention also relates to a method to use said acetal derivative to prepare intermediates useful for the preparation of perfuming ingredients.
COREY, E. J.;KANG, MYUNG-CHOL;DESAI, MANOJ C.;GHOSH, ARUN K.;HOUPIS, IOAN+, J. AMER. CHEM. SOC., 110,(1988) N 2, 649-651
作者:COREY, E. J.、KANG, MYUNG-CHOL、DESAI, MANOJ C.、GHOSH, ARUN K.、HOUPIS, IOAN+
DOI:——
日期:——
COREY, E. J.;GAVAI, ASHVINIKUMAR V., TETRAHEDRON. LETT., 29,(1988) N 26, C. 3201-3204
作者:COREY, E. J.、GAVAI, ASHVINIKUMAR V.
DOI:——
日期:——
Ginkgolide Compounds, Compositions, And Extracts, And Uses Thereof
申请人:Vitolo Ottavio V.
公开号:US20090156668A1
公开(公告)日:2009-06-18
The present invention relates to Ginkgolide derivatives, compositions and extracts comprising one or more Ginkgolides and/or derivatives thereof and methods of use of the compositions to treat neurological disorders and as imaging agents.