Radical cyclization of β-(3-indolyl) ketone O-pentafluorobenzoyloximes proceeds by the treatment with a catalytic amount of copper powder in 1,2-dichloroethane to generate 3,4-dihydro-α-carbolines,...
Thermal Rearrangement of Indolyl Oxime Esters to Pyridoindoles
作者:Fernando Portela-Cubillo、Brian A. Surgenor、R. Alan Aitken、John C. Walton
DOI:10.1021/jo801751a
日期:2008.10.17
Acyl oximes derived from a variety of indolylalkanones underwent a ring closure sequence during FVP to afford 9H-pyrido[2,3-b]indoles. Unlike UV light promoted reactions of oxime esters, the mechanism is almost certainly not mediated by iminyl radicals but probably involves tautomerism, elimination of acetic acid, and a final electrocyclic ring closure.