W. Zhang et G. Pugh, Free radical reactions for heterocycle synthesis. Part 4: A double ipso substitution reaction for azacoumarins, TETRAHEDR L, 42(33), 2001, pp. 5613-5615
A highly efficient route to azacoumarins with an unusual mechanism of doubl
e ipso substitutions is described. (C) 2001 Elsevier Science Ltd. All right
s reserved.