1, 4-Addition of organocopper reagents to γ-substituted α, β-unsaturated γ-lactones followed by intramolecular trapping of the resulted enolates afforded cis, cis-1, 2, 3-trisubstituted cyclopentanes and cyclohexanes in a stereocontrolled manner. This new cyclization reaction to cyclopentanes provides a new synthetic route to the key intermediate in the synthesis of 11-deoxyprostaglandins.
1、4-将
有机铜试剂添加到γ-取代的α、β-不饱和γ-内酯中,然后对生成的烯醇进行分子内捕获,以立体可控的方式得到顺式、顺式-1、2、3-三取代的
环戊烷和
环己烷。这种
环戊烷的新环化反应为合成 11-脱氧
前列腺素的关键中间体提供了一条新的合成途径。