Reactivity of Chiral α-Amidoalkylphenyl Sulfones with Stabilized Carbanions. Stereoselective Synthesis of Optically Active 1-Aminopyrrolizidine
作者:Nicola Giri、Marino Petrini、Roberto Profeta
DOI:10.1021/jo048882y
日期:2004.10.1
functionalized allylzinc reagents react with optically active α-amidoalkylphenyl sulfones to give N-carbamoylamino derivatives with variable levels of anti diastereoselectivity. Zinc enolates provide comparable results with respect to lithium enolates in terms of diastereoselectivity but afford β-amino ester derivatives in lower yield. The synthetic utility of the obtained chiral N-carbamoylamino esters is demonstrated
金属烯醇化物和官能化试剂allylzinc与光学活性的反应α-amidoalkylphenyl砜,得到Ñ -carbamoylamino具有可变水平的衍生物反非对映选择性。就非对映选择性而言,烯醇锌提供与烯醇锂可比较的结果,但以较低的产率提供β-氨基酯衍生物。所获得的手性N-氨基甲酰基氨基酯的合成效用通过(-)-1-氨基吡咯烷核苷(用于制备各种生物活性物质的中心中间体)的第一对映选择性合成来证明。