A diastereoselective synthesis of spirocyclopentene-1H-indene-1,3(2H)-diones through a three-component reaction of alkyl isocyanides, dialkyl acetylenedicarboxylates, and 2-(alkylamino)-2-(1,3-dioxo-1H-inden-2(3H)-ylidene)acetonitriles is described. This reaction forms two stereogenic centers with remarkable diastereoselectivity. The crystal structure of a typical product has been determined by X-ray
通过烷基异
氰化物、
乙炔二
羧酸二烷基酯和 2-(烷基
氨基)-2-(1,3-dioxo-1) 的三组分反应非对映选择性合成螺
环戊烯-1 H-
茚-1,3(2 H )-二酮描述了H-
茚-2(3 H )-亚叉基)
乙腈。该反应形成两个具有显着非对映选择性的立体中心。典型产品的晶体结构已通过 X 射线衍射确定。