Point-to-helical chirality transfer for a scalable and resolution-free synthesis of a helicenoidal DMAP organocatalyst
作者:Matthew R. Crittall、Nathan W. G. Fairhurst、David R. Carbery
DOI:10.1039/c2cc35583c
日期:——
The synthesis of a second-generation [6]-helicenoidal DMAP organocatalyst is reported. The synthesis is reliant upon a highly diastereoselective Rh-catalysed [2 + 2 + 2] triyne cycloisomerization, using an existing stereocentre to control the sense of forming helicity. Taken together, a scalable (>1 g), resolution-free entry to a helical DMAP with the capacity for subsequent functionalization, has been achieved.
报告了第二代 [6]-helicenoidal DMAP 有机催化剂的合成。该合成依赖于 Rh 催化的高非对映选择性 [2 + 2 + 2] 三炔环异构化,利用现有的立体中心控制形成螺旋的意义。综上所述,我们实现了一种可扩展(大于 1 克)、无分辨率的螺旋 DMAP,并具有后续官能化的能力。