SYNTHESIS OF NEW HETEROCYCLIC RING-SYSTEMS - INDENO[2,1-B]-BENZO[G]INDOLIZINE AND INDENO[1',2'-5,4]PYRROLO[2,1-A]PHTHALAZINE

Some derivatives of the title heterocycles have been prepared by a "one step" synthesis from 2-hydroxy-2-acylmethylene-1,3-indandiones, tosyl chloride and isoquinoline or phthalazine. The synthesis of new indeno[2, 1-b]indolizine derivatives performed by using pyridine as base is also reported. © 1990.