作者:Thomas J. Hunter、George A. O'Doherty
DOI:10.1021/ol016399t
日期:2001.8.1
enantioselective synthesis of cryptocarya diacetate has been achieved in 10 steps from ethyl sorbate. The route relies upon an enantio- and regioselective Sharpless dihydroxylation and a palladium-catalyzed reduction to form a delta-hydroxy-1-enoate, which was subsequently converted into a benzylidene-protected 3,5-dihydroxy carboxylic ester. This ester was converted into cryptocarya diacetate in 14% overall
[反应:请参见文字]。由山梨酸乙酯分十步完成了隐乙酸二乙酸酯的对映选择性合成。该途径依赖于对映体和区域选择性的Sharpless二羟基化和钯催化的还原以形成δ-羟基-1-烯酸酯,其随后被转化为亚苄基保护的3,5-二羟基羧酸酯。通过烯丙基化和复分解环闭合反应序列,该酯以14%的总产率转化为隐乙酸二乙酸酯。