Stereoselective alkylation of cyclic and acyclic chiral β-enamino ketones lithium dianions: synthesis of either (R)- or (S)-chiral 1,3-diketones.
作者:Giuseppe Bartoli、Marcella Bosco、Cristina Cimarelli、Renato Dalpozzo、Giovanni De Munno、Gianni Palmieri
DOI:10.1016/s0957-4166(00)80373-0
日期:1993.7
synthesis of either (R)- or (S)-chiral 1,3-diketones through asymmetric γ alkylation reaction of cyclic and acyclic chiral β-enamino ketones was here performed. The alkylation takes place with good yields and high d.e. in HMPA/THF. Both the pure enantiomers of 1,3-diketones can be formed by simple hydrolysis of the epimeric β-enamino ketones obtained with this method, choosing the suitable synthetic strategies
在此通过环状和非环状手性β-烯氨基酮的不对称γ烷基化反应合成(R)-或(S)-手性1,3-二酮。烷基化需要有良好的收益率和高的地方去的HMPA / THF。1,3-二酮的两个纯对映异构体都可以通过简单水解这种方法获得的差向异构体β-烯氨基酮来形成,选择合适的合成策略。提出了不对称感应的解释。