The Suzuki Coupling Reaction in the Stereocontrolled Synthesis of 9-<i>cis</i>-Retinoic Acid and Its Ring-Demethylated Analogues<sup>,</sup><sup>1</sup>
作者:Yolanda Pazos、Beatriz Iglesias、Angel R. de Lera
DOI:10.1021/jo010711v
日期:2001.12.1
thallium-accelerated Suzuki coupling reaction of tetraenyl iodide 19 and cyclohexenyl boronate 18 afforded ethyl 9-cis-retinoate (12) in high yield. Both coupling partners of the Suzuki reaction are better reacted immediately after generation from their precursors, tetraenylstannane 10 and cyclohexenyl iodide 13. The geometrically homogeneous tetraenylstannane 10, comprising the polyenic sidechain of ethyl 9-cis-retinoate