Patent GB-646896-A (GB)
Title: An improved process of preparing trinuclear cyanine dyes
IPC: C09B23/01
Filed: 1948-07-12
Abstract: Trinuclear cyanine dyes are prepared by treating in the presence of a basic condensing agent (e.g. trimethylamine, triethylamine, pyridine, methyl or ethyl pyridine, quinoline, or potassium carbonate) a thiazolone cyanine dye of the general formula <FORM:0646896/IV (c)/1> wherein A1 is the residue of a heterocyclic mononuclear or polynuclear compound, R2 is alkyl, allyl, aryl, or aralkyl, R3 is alkyl, hydroxyalkyl, alkoxyalkyl, or aralkyl, X is an acid radical, and m is 1 or 2, with the quaternary ammonium salt of a heterocyclic nitrogen compound containing in the a - or g -position to the N atom a group reactive with a reactive methylene group, e.g. an alkyl- or aryl-mercapto, b -alkyl- or b -aryl-mercaptovinyl, b -alkylmercapto-b -alkylvinyl or -b -arylvinyl, N-substituted 2-aminovinyl, N-substituted 4-aminobutadienyl, or N-substituted 6-aminohexatrienyl group.  In examples, dyes are prepared by boiling together in methanol containing triethylamine: (1) [3-ethylbenzthiazole]-[3 - phenylthiazolone - 4] - monomethinecyanine bromide and 2-methylmercapto-6-methylquinoline ethiodide; (2) [3-ethylbenzthiazole]-[3-phenylthiazolone-4]-monomethine cyanine bromide and 2-methylmercapto-6-methoxybenzthiazole methiodide; (3) [3-methylbenzselenazole] - [3 - phenylthiazolone - 4] - monomethine cyanine bromide and 2-ethylmercaptobenzthiazole ethyl p-toluenesulphonate; (4) [3-ethylbenzthiazole] - [3 - o - tolylthiazolone - 4] - monomethine cyanine iodide and 2-methylmercapto - 5 - methoxybenzselenazole ethosulphate; (5) [3 : 6 - dimethylbenzthiazole] - [3-phenylthiazolone - 4] - monomethine cyanine bromide and 2-methylmercapto-5-methoxybenzselenazole ethosulphate; (6) [3 - ethylbenzthiazole] - [3 - phenylthiazolone - 4] - monomethine cyanine bromide and 2 - (b  - acetanilidovinyl) - benzthiazole ethiodide; (7) [3 - ethyl - 5 - methoxybenzselenazole] - [3 - phenylthiazolone - 4] - monomethine cyanine bromide and 2 - (b - acetanilidovinyl) - benzoxazole ethiodide; (8) [3 - ethylbenzthiazole] - [3 - phenylthiazolone - 4] - monomethine cyanine bromide and 2-(b -acetanilidovinyl)-quinoline ethiodide; (9) [3-ethylbenzthiazole] - [3 - phenylthiazolone - 4] - monomethine cyanine bromide; 4-(b -anilinovinyl)-quinoline ethiodide, and acetic anhydride; (10) [3 - ethylbenzthiazole] - [3 - phenylthiazolone - 4] - monomethine cyanine bromide, 2 - b  - anilinovinyl - 5 - methyl - 4 - phenylthiazole ethiodide, and acetic anhydride; (11) [3-ethylbenzthiazole] - [3 - phenylthiazolone - 4] - monomethine cyanine bromide and 2-(b -ethyl : b -methylmercapto - vinyl) - benzthiazole ethiodide; (12) [3-ethyl-5-methoxybenzselenazole]-[3-phenylthiazolone-4] -monomethine cyanine bromide and 2-(b -ethyl : b -methylmercaptovinyl)-benzthiazole ethiodide; (13) [3-ethyl-4-phenyl - 3 - methylthiazole] - [3 - phenylthiazolone - 4] - monomethine cyanine bromide and 2 - (b  - ethyl : b  - methylmercaptovinyl) - 6 - methoxybenzthiazole ethiodide; (14) [3 - ethylbenzthiazole] - [3 - o - tolylthiazolone - 4] - monomethine cyanine bromide and 2 - (b  : b - methylmercaptovinyl) - benzthiazole ethiodide; (15) 3 - ethyl - 6 - methoxybenzthiazole] - [3 - a  - naphthylthiazolone - 4] - monomethine cyanine bromide and 2 - (b  - ethyl : b  - methylmercaptovinyl) - benzthiazole ethiodide; (16) [3 - ethyl - 6 - methoxybenzthiazole] - [3 - b  - naphthylthiazolone - 4] - monomethine cyanine bromide and 2-(b -ethyl : b -methylmercaptovinyl) - 6 - methoxybenzthiazole ethiodide; (17) [3-ethylbenzthiazole]-[3 - ethylthiazolone - 4] - monomethine cyanine bromide and 2-(b -ethyl : b -methylmercaptovinyl) - benzthiazole ethiodide; (18) [3 - ethylbenzthiazole] - [3 - allylthiazolone - 4] - monomethine cyanine chloride, 2-(b -anilinovinyl)-benzoxazole ethobromide, and acetic anhydride, and isopropanol in place of methanol; (19) [3-ethylbenzthiazole]-[3-allylthiazolone-4]-monomethine cyanine chloride and 2-(b -acetanilidovinyl)-benzthiazole ethiodide, with isopropanol in place of methanol; (20) [3-methyl-6-methoxybenzthiazole] - [3 - phenylthiazolone - 4] - monomethine cyanine bromide and 2-(b -ethyl : b -methylmercaptovinyl) - 6 - methoxybenzthiazole ethiodide; (21) [3-ethylbenzthiazole]-[3 - phenylthiazolone - 4] - monomethine cyanine bromide and 2-(b -methyl : b -methylmercaptovinyl) - benzthiazole ethiodide; (22) [1 - ethyl - 3 : 3 : 5 - trimethylindolenine] - [3 - phenylthiazolone - 4] - monomethine cyanine bromide and 2 - (b  - acetanilidovinyl) - benzthiazole ethiodide (with isopropanol in place of methanol); (23) [3 - ethylbenzthiazole] - [3 - phenylthiazolone - 4] - monomethine cyanine bromide and 2-(6-anilino-1 : 3 : 5-hexatrienyl)-benzthiazole ethiodide (without boiling and with piperidine in place of triethylamine); (24) [3-ethyl - 5 - methoxybenzselenazole] - [3 - phenylthiazolone - 4] - monomethine cyanine bromide and 2 - (6 - anilino - 1 : 3 : 5 - hexatrienyl) - benzthiazole ethiodide (without boiling and with piperidine in place of triethylamine); (25) [3-ethylbenzthiazole] - [3 - phenylthiazolone - 4] - monomethine cyanine bromide and 2-(4-acetanilido - 1 : 3 - butadienyl) - benzthiazole ethiodide; and (26) [3-ethyl-4 : 5 diphenyloxazole]-[3 - phenylthiazolone - 4] - monomethine cyanine iodide and 2-(b -ethyl : b -methylmercaptovinyl)-benzthiazole ethiodide (with isopropanol in place of methanol).  The Specification also describes the preparation of the thiazolonecyanine dyes of Specification 646,900.