Syntheses of 6-Substituted 7, 8, 9, 10-Tetrahydrophenanthridin-7-ones through Sulfur Extrusion

Abstract

6-Substituted 7, 8, 9, 10-tetrahydrophenanthridin-7-ones were synthesized by dehydrative cyclization and concomitant sulfur extrusion of 3-(2-acylaminophenylthio)-2-cyclohexen-1-ones with polyphosphoric acid.