POLYHETERO POLYCYCLIC RING-SYSTEMS .29. SYNTHESIS OF STEROID-TYPE COMPOUNDS DERIVED FROM 2H-4-OXO-3,4-DIHYDRO-5-METHYL-8-PHENYL-1-THIOPYRANO[2,3-E]BENZOFURAN AND 2H,5H-4-OXO-5-METHYL-3,4-DIHYDROINDENO [1,2-B]THIOPYRAN