A facile synthesis of novel ferrocene grafted spiro-indenoquinoxaline pyrrolizidines via one-pot multicomponent [3+2] cycloaddition of azomethine ylides

A facile one-pot synthesis of novel ferrocene grafted spiro-indenoquinoxaline pyrrolizidines via multicomponent-[3+2]-cycloaddition of azomethine ylides is described. The methodology is very simple and applicable to a wide variety of ferrocene derived dipolarophiles. The structures of cycloadducts were confirmed by spectroscopic analysis. X-ray analysis of one of the analogs, adds conclusive support to the proposed structures.