Shibuya, Isao published the artcileThe reaction of 2-methylthio-4,6-diphenyl-1,3-thiazin-1-ium perchlorate with nucleophiles, Product Details of C3H8N2S, the publication is Nippon Kagaku Kaishi (1986), 780-4, database is CAplus.
Several 2-substituted 4,6-diphenyl-1,3-thiazin-1-ium salts I (R = MeS, Ph, Me2N, 4-Me2NC6H4; X = ClO4, BF4) were accessible conveniently by the reaction of benzoylphenylacetylene with RCSNH2 in the presence of HX. The reactivity of I (R = MeS, X = ClO4) (II) toward nucleophiles, such as active methylenes and various amino compounds, was investigated. Active methylenes and monofunctional primary amines attacked the 2-position of the thiazinium ring to afford 2-(disubstituted methylene)- and 2-(substituted imino)-4,6-diphenyl-2H-1,3-thiazines, resp. On the other hand, bifunctional nucleophiles, such as hydrazine and hydroxylamine, reacted at the 4- and 6-positions of II to give 3,5-diphenylpyrazole and isoxazole, resp.
Nippon Kagaku Kaishi published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C14H28O5S, Product Details of C3H8N2S.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia