SYNTHESIS, REACTIONS AND SPECTRAL PROPERTIES OF 3-CHLORO-2,6DIARYL-4H-THIOPYRAN-4-ONES. SYNTHESIS OF SOME NEW 3-CHLORO-SPIROTHIOPYRAN DERIVATIVES

摘要: 3-Chloro-2-phenyl-6-p-tolyl and 3-chloro-2,6-di-p-tolyl-4H-thiopyran-4-ones have been synthesized in moderate yieldes from the reaction of 3-chloro-tetrahydrothiopyran-4-ones with phosphorus pentachloride. Their thiones, oximes, hydrazones also prepared. Treatment thiones malononitrile gave corresponding 3-chloro-4-thiopyrylidenemalononitriles which 3-chloro-spirothiopyran derivatives pyrazole, isoxazole, 1,3-thiazines when treated hydrazine hydrate, hydroxylamine hydrochloride, thiourea thiosemicarbazide, respectively. While treatment 3-chloro-thiopyrylidene-malononitriles acetylacetone pyran.