Electrophilic Cyanation of Boron Enolates: Efficient Access to Various β-Ketonitrile Derivatives
作者:Kensuke Kiyokawa、Takaya Nagata、Satoshi Minakata
DOI:10.1002/anie.201605445
日期:2016.8.22
highly efficient electrophilic cyanation of boron enolates using readily available cyanating reagents, N‐cyano‐N‐phenyl‐p‐toluenesulfonamide (NCTS) and p‐toluenesulfonyl cyanide (TsCN), is reported. Various β‐ketonitriles were prepared by this new protocol, which has a remarkably broad substrate scope compared to existing methods. The present method also allowed efficient synthesis of β‐ketonitriles containing
据报道,使用现成的氰化试剂N-氰基-N-苯基-对甲苯磺酰胺(NCTS)和对甲苯磺酰氰(TsCN)可以实现烯醇硼的高效亲电氰化。通过该新方案制备了各种β-乙腈,与现有方法相比,其具有显着广泛的底物范围。本方法还可以有效合成含有季碳原子中心的β-乙腈。另外,描述了使用手性烯醇硼用于对映选择性氰化反应的初步结果。