The preparation of synthetically useful carbonyl-protected δ- and ε-lithio ketones via reductive lithiation
作者:Shirong Zhu、Theodore Cohen
DOI:10.1016/s0040-4020(97)10230-7
日期:1997.12
and ε-lithioketone equivalents. Primary and tertiary organolithiums have been generated and the ketone function may be part of a ring. The major synthetic use demonstrated in this report is the conversion to mixed heterocuprates which react with acyl chlorides to yield mono-protected 1,6- or 1,7-diketones. The cuprates also undergo conjugate addition to enones.
芳族自由基阴离子诱导的δ-和ε-(苯硫基)酮的缩醛或硫缩醛的还原锂化反应提供δ-和ε-硅酮等效物。伯和叔有机锂已经生成,酮官能团可能是环的一部分。本报告中证明的主要合成用途是转化为混合的杂铜酸酯,后者与酰氯反应生成单保护的1,6-或1,7-二酮。铜酸盐还经历了烯酮的共轭加成。