A pseudopericyclic [3,5]-sigmatropic rearrangement of a coumarin trichloroacetimidate derivative
作者:Trideep Rajale、Shikha Sharma、Daniel K. Unruh、Daniel A. Stroud、David M. Birney
DOI:10.1039/c7ob02335a
日期:——
Thermolysis of a coumarin trichloroacetimidate yields a single rearrangement product. The proposed mechanism is a pseudopericyclic allowed (Woodward–Hoffman forbidden) [3,5]-sigmatropic rearrangement to form the corresponding amide followed by a sigmatropic [1,5]-hydrogen migration. Transition state calculations at the B3LYP/6-31G(d,p) level support this mechanism and suggest the selectivity is influenced