Synthetic Studies on Quinine: Quinuclidine Construction via a Ketone Enolate Regio- and Diastereoselective Pd-Mediated Allylic Alkylation
作者:Deidre M. Johns、Makoto Mori、Robert M. Williams
DOI:10.1021/ol061524s
日期:2006.8.1
7-Hydroxy-quinine was synthesized by an asymmetric aldol reaction that establishes the C8 and C9 stereochemistry, followed by construction of the 3-vinyl-quinuclidine azabicyclo[2.2.2]octane by C3-C4 ring closure using an intramolecular palladium-mediated allylic alkylation with excellent regio- and diastereoselectivity. This is the first report of a ketone-enolate-stereocontrolled allylic alkylation
通过建立C8和C9立体化学的不对称醛醇缩合反应合成7-羟基-奎宁,然后使用分子内钯介导的烯丙基通过C3-C4闭环构造3-乙烯基-奎宁环氮杂双环[2.2.2]辛烷具有出色的区域和非对映选择性的烷基化。这是由钯介导的酮-烯醇-立体控制的烯丙基烷基化的首次报道。评价标题化合物和脱氢奎宁类似物的抗疟活性。