作者:Ya-Ting Lin、Feng-Yi Lin、Minoru Isobe
DOI:10.1021/ol5029755
日期:2014.11.21
A stereocontrolled synthesis of the ABC rings of solanoeclepin A has been achieved. The seven-membered ring B was synthesized by an intramolecular Prins-ene reaction between an aldehyde and an enyne-dicobalthexacarbonyl complex. The acetylene in this synthesis plays multiple roles: to join the A and C rings, to allow stereoselective cyclization via dicobalthexacarbonyl complexation, and to facilitate
已实现了茄核素A的ABC环的立体控制合成。七元环B是通过醛与烯炔-二钴六羰基络合物之间的分子内Prins-ene反应合成的。在该合成乙炔扮演多重角色:加入A和C的环,以允许经由dicobalthexacarbonyl络合立体选择性环化,并促进尼古拉斯阳离子稳定化,然后脱质子化以形成内切-环状烯烃(尼古拉斯-普林斯环化)。