Base-Catalyzed Direct Aldolization of α-Alkyl-α-Hydroxy Trialkyl Phosphonoacetates
作者:Michael T. Corbett、Daisuke Uraguchi、Takashi Ooi、Jeffrey S. Johnson
DOI:10.1002/anie.201200559
日期:2012.5.7
Pass the P: Catalytic direct aldol addition of α‐hydroxy trialkyl phosphonacetates to aldehydes affords α‐hydroxy‐β‐phosphonyloxy ester products (see scheme). The fully substituted glycolate enolate intermediate is generated in situ under mild conditions by a [1,2] phosphonate–phosphate rearrangement. High enantioselectivity and dramatic enhancement of reaction diastereocontrol is realized by the application
通过 P : α-羟基三烷基膦酸酯与醛的催化直接醛醇加成得到 α-羟基-β-膦酰氧基酯产物(见方案)。完全取代的乙醇酸烯醇酯中间体是在温和条件下通过 [1,2] 膦酸-磷酸重排原位生成的。手性亚氨基正膦催化剂的应用实现了高对映选择性和反应非对映控制的显着增强。