We report an expedited flow chemistry approach to the catalyst/photosensitizer-free UV photocyclizations of aryl-enamines to afford spiroindolines. The photocyclizations occur under mild conditions and are tolerant to a variety of substituted aryl-enamines and spirocycle ring sizes. This flow protocol has a wide substrate scope and addresses the problems of irreproducibility and scalability of batch
我们报告了一种快速的流
化学方法,可对芳基-烯
胺类的催化剂/无光敏剂的UV光环化反应提供螺二氢
吲哚。光环化在温和的条件下发生,并且耐受各种取代的芳基-烯胺和螺环大小。该流方案具有广泛的底物范围,并解决了批量方案的不可再现性和可扩展性的问题。该反应的效用在(±)-霍斯
菲林的缩短形式合成中得到证明。