A versatile synthesis of the group 15 and 16 3-benzoheteroepines involving the first isolated examples of several C-unsubstituted 3-benzoheteroepines
Abstract
Group 15 (P, As, Sb and Bi) and group 16(S, Se and Te) 3-benzoheteroepines 2, involving the first isolated examples of several C-unsubstituted fully unsaturated 3-benzoheteroepines, are prepared in two steps from (Z,Z)-o-bis(β-bromovinyl)benzene 4 and their thermal stabilities examined.