Detail of "6780-49-0"

Reference

Pyrylocyanines

10. Isobenzothiopyrylocyanines. Tolmachev, A. I.; Shulezhko, L. M. (Inst. Org. Khim., Kiev, USSR). Khim. Geterotsikl. Soedin., (6), 777-82 (Russian) 1980. CODEN: KGSSAQ. ISSN: 0453-8234. DOCUMENT TYPE: Journal CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Section cross-reference(s): 27, 28 Eight isobenzothiopyrylocyanine dyes I (R = R1; R = R2, Z = direct double bond, X = S or O; R = R2, Z = CH:CH, X = S; R = R3, Z = direct double bond or CH:CH) and II (X1 = CMe2 or S) was prepd. by reacting III [75807-93-1] (or its O analog [75807-93-1]) with p-Me2NC6H4CHO [100-10-7], 3-phenyl-2-benzothiopyran-1-thione [54199-54-1], 1-thioflavone [784-62-3], or HC(:NPh)OEt [6780-49-0], and by reacting IV [75807-94-2] with 4-methyl-1-thioflavylium perchlorate [22956-26-9], 1,2,3,3-tetramethyl-3H-indolium perchlorate [13330-41-1], or 2,3-dimethylbenzothiazolium Me sulfate [2038-15-5]. Electronic spectra of I and II were discussed as a function of their structure. Sym. I were unstable in alcs. but they were stable in in aprotic solvent. The prepn. of the intermediates III and IV were reported.