Abstract
A series of phosphono substituted-indoles, quinolines and isoquinolines were prepared in reasonable yields from the reactions of 2,3-(1) and 2,4-benzoxazinones (2) with different types of the Wittig-Horner reagents 13a, 13b, 13c and 20, in the presence of a base. The products rationalized as proceeding via 1:1 intermediates, which can be envisaged as having the anionic forms 15 or 25, and in turn relevant to the overall products.