S. V. Vasilevskii, Yu. V. Nelyubina, N. G. Kolotyrkina, P. A. Belyakov, L. B. Kulikova, A. N. Kravchenko, “Reaction of 1,3-dimethyl-3a,9a-diphenyl-3,3a,9,9a-tetrahydroimidazo-[4,5-e]-1,3-thiazolo[3,2-b]-1,2,4-triazine-2,7(1H,6H)-dione with isatins”, Mendeleev Commun., 20:5 (2010), 288

Abstract: Condensation of 1,3-dimethyl-3a,9a-diphenyl-3,3a,9,9a-tetrahydroimidazo[4,5-e]-1,3-thiazolo[3,2-b]-1,2,4-triazine-2,7(1H,6H)-dione with isatins afforded 6-(2-oxo-1,2-dihydro-3H-indol-3-ylidene)-3,3a,9,9a-tetrahydro-1,3-dimethyl-3a,9a-diphenylimidazo-[4,5-e]thiazolo[3,2-b]-1,2,4-triazine-2,7(1H,6H)-diones; a new conglomerate (space group P2₁2₁2₁) was found by an X-ray diffraction study.

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