Iminium carbonic acid derivative salts. XII . electrophilic reactions of 2-methylthio-4,5-dihydrothiazolium iodides, 5-methyl-2-methylthiothiazolium iodides and 2-methylthio-5,6-dihydro-1,3-thiazinium iodides. part III. With Vinylogous and Phenylogous Active Methylene Compounds

3-Benzyl-2-memyltmo-4,5-dmydrothiazolium iodide ( 1 ), 5-metlyl-2-methylthio-3-phenethylthiazolium iodide ( 4 ) and 3-methyl and 3-benzyl-2-methylthio-5,6-dihydro-1,3-thiazinium iodides 7a, b were reacted with the vinylogous doubly activated CH-acidic compounds 2a-d and the phenylogous doubly activated components 8, 11, 16, 19 and 21 to yield new types of S, N-heterocycles 3, 5, 6, 9, 10, 12, 13, 14, 15 with the partial structure of push-pull substituted butadienes and 17, 18, 20, 22, 23 and 24 with the character of push-pull substituted phenyl ketene S, N-acetals.