Organocatalyzed Enantioselective Synthesis of Quaternary Carbon-Containing Isoindolin-1-ones
作者:Xiaolei Yu、Youming Wang、Guiping Wu、Haibin Song、Zhenghong Zhou、Chuchi Tang
DOI:10.1002/ejoc.201100163
日期:2011.6
corresponding quaternary carbon-containing 3,3-disubstituted isoindolin-1-ones in good yields (up to 99 %) with good to excellent enantioselectivities (up to 95 % ee). The optical purity of the product was further improved after a single recrystallization. This protocol provides a convenient method for the catalytic asymmetric synthesis of valuable 3,3-disubstituted isoindolin-1-ones in high yields
3,3'-三苯基甲硅烷基取代的 (S)-BINOL-基(1,1'-bi-2-萘酚)磷酸已被证明是一种有效的有机催化剂,用于吲哚与 3-取代 3 的不对称 Friedel-Crafts 烷基化-羟基异吲哚啉-1-酮,以良好的产率(高达 99%)提供相应的含季碳的 3,3-二取代异吲哚啉-1-酮,具有良好至极好的对映选择性(高达 95% ee)。单次重结晶后产物的光学纯度进一步提高。该协议为以高产率和对映选择性催化不对称合成有价值的 3,3-二取代异吲哚啉-1-酮提供了一种方便的方法。