New methodology for the preparation of pyrrole and indole derivatives via iminophosphoranes:synthesis of pyrrolo[1,2-a]quinoxalines, indolo[3,2-c]quinolines and indolo[1,2-c]quinazolines
作者:Pedro Molina、Mateo Alajarin、Angel Vidal
DOI:10.1016/s0040-4020(01)81384-3
日期:1990.1
yl pyrrole with heterocumulenes leads to functionalized pyrrolo[l,2-a]quinoxalines. Iminophosphorane , derivedfrom2-(o-amino)phenyl indole, reacts under mild conditions with isocyanates to form which are converted into 5-amino-11H-indolo[3,2-c]quinolines . Iminophosphorane 19 also reacts with carbon dioxide and carbon disulfide to give indolo[3,2-c]quinolines . Iminophosphorane . derivedfrom 2-