Two-step conversion of 3,4,4,5-tetrachloro-4H-1,2,6-thiadiazine into 4,5,6-trichloropyrimidine-2-carbonitrile
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DOI: 10.1016/j.tetlet.2017.05.082
Abstract: Abstract Tin reduction of 3,4,4,5-tetrachloro-4 H -1,2,6-thiadiazine afforded perchloro-9-thia-1,5,8,10-tetraazaspiro[5.5]undeca-1,4,7,10-tetraene (10%) and 3,5-dichloro-4 H -1,2,6-thiadiazine-4-thione (27%), the structures of which were supported by single crystal X-ray crystallography. Treating the tetrachlorothiadiazine with Ph 3 P (1 equiv.) afforded… read more here.
Keywords: trichloropyrimidine carbonitrile; tetrachloro thiadiazine; two step; thiadiazine ... See more keywords
Reaction of 3,4,4,5-tetrachloro-4H-1,2,6-thiadiazine with benzyltriethylammonium chloride
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DOI: 10.1016/j.tetlet.2018.08.007
Abstract: Abstract 3,4,4,5-Tetrachloro-4H-1,2,6-thiadiazine was reacted with BnEt3NCl (10 mol%) to give perchloro-9-thia-1,5,8,10-tetraazaspiro[5.5]undeca-1,4,7,10-tetraene (up to 18% yield), 4,5,6-trichloropyrimidine-2-carbonitrile (up to 44% yield) and four minor side products: 2,7-dichlorothiazolo[5,4-d]pyrimidine-5-carbonitrile, 2-(4-chloro-6H-thiazolo[5,4-c][1,2,6]thia-diazin-6-ylidene)malononitrile, 4,8-dichloropyrrolo[2′,1′:2,3]imidazo[4,5-c][1,2,6]thiadiazine-6,7-dicarbonitrile and 4,7-dichloro-[1,2,6]thiadiazino[3,4-b]thiazolo[5,4-e][1,4]diazepin-9(10H)-one. Single crystal X-ray studies support the… read more here.
Keywords: benzyltriethylammonium chloride; thiadiazine benzyltriethylammonium; reaction tetrachloro; thiadiazine ... See more keywords