Access to All‐Carbon Spirocycles through a Carbene and Thiourea Cocatalytic Desymmetrization Cascade Reaction
作者:Shitian Zhuo、Tingshun Zhu、Liejin Zhou、Chengli Mou、Huifang Chai、Yunpeng Lu、Lutai Pan、Zhichao Jin、Yonggui Robin Chi
DOI:10.1002/anie.201810638
日期:2019.2.4
A new catalytic approach for rapid asymmetric access to spirocycles is disclosed. The reaction involves a carbene‐ and thiourea‐cocatalyzed desymmetrization process with the simultaneous installation of a spirocyclic core. The use of a thiourea cocatalyst is critical to turn on this reaction, as no product was formed in the absence of a thiourea. Our study constitutes the first success in the carbene‐catalyzed