SU81712A1 - Method for preparing quaternary salts of benzthiazoles or benzenelenazoles - Google Patents

Description

Upon receipt of tia-and selenocarboniunpno by condensation of even-n-negative salts of benzthiazoles and benzselenazoles containing methylene group in the 2-position. with ortho-efmrami Kap6onoF5i, ix acids in pyridine are formed, often in large quantities. 2-ac-ylmeti. 1-ene derivatives of the corresponding 3-alkyl benzothiazoles or seleiaazolpi. These products can be isolated from the reaction mixture after precipitation of the sprays1 (and used to produce different carbocyaniums and merociains. However, in a number of cases, the formation of dyes and their acylmethylium derivatives has not been used and these compounds can be used.

The described method permits the use of four-verticate salts of beistiazolo, or benzlelenazoles, with good yields. The peculiarity of the method is. that 3-alkyl-2 acylmethylenebenztpazolii or oepzomenazolines or byproducts of io; 1 study of thia and seleicarbonium, which contain these specified properties. treated with dilute Mii. imperalic acids and high temperatures.

In the case of formylmethylene derivatives (methylene-aldehyde |;), during hydrolysis, a partial formation of He3aNrenieHnHx in the pslimmetpy chain of thia- or seleiocarbociaiiosis is observed at the expense of the quaternary salt design with an enamelized mineral. However, these dyes, -1, and are also easily separated from the resulting quarter salt.

For the quaternary salts of biezthiazoles and beiezelenazoles, b | can be used; only the selected anilmethylene compounds are used. and mixtures of these compounds with other by-products of orazuyuchpms iri karbotsyaninovoy koidenyaschp. In this case, after hydrolysis and removal of excess acid, similar products are used to impose weak bases, for example, pyridium or its homologues, and ooradia quaternary bromine B1, then separate it out overnight .jvi by the usual method.

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40-50 ml and cool. In this case, a sub-payment of 2-meti.chbentzaloza falls out, which is filtered and pro. Iodine and acetone. Output 8, 9 g (59. from theory). Temperature of 190-191 iodomethyl and 1-year-2-meth 1l-ibecelenate: ol from 3-methyl-and corresponding 3-eth11-bep: - selenazolin-2-meth11lsi-oalr degidov.

Example VI The water-iiridine mother liquor from 3,3-dis11l-9-meth 1L1, 5, 4-, 5 - dibenzotnacarbocyaninebromnda (and heating of P1em ethyl-g-toluenesulfonate-2-methnl; -i-naphthothiazole e ortho-sulphonate-2-methnl; The 130 r and nirnd irn temperature of 130 with the next product and the addition of 10% potassium bromide and filtering of the dye) is diluted with water and neutralized with kietot salt. On the next day, the viny sediment is filtered off, washed with water and evolved 1. Then 20 mixtures of nocturnal products cues t 15 h. with 200 M.2 hydrochloric acid in a flask with reverse cold | 1, n P1k. After cooling, the solution is mixed with mass KViiicToii, heated to dryness, the residue is heated with 400 M.I water, the solution is neutralized with nitride II resinous precipitate is filtered off. The filtrate of the obsipeeshipot i.agrevine. M with activated carbon, vaporized to a volume of 100 .i;,; and 10 g of potassium iodide is added to it. At the same time, it gives 2-methyl-, -naphtotnazole iodoethyl, which is removed and splashed with 5-10 M.I of water and 50. I-g of anetone. Output 10-12 g. Temieratu 11a and clauses 207-. colorless crystals (; i3 ethanol).

And redemt and z o breetn and

The method of obtaining quaternary salts benztnazo.Yuv nln benzenelenazoles. about t; i and h with il and with m that 3-al; 1l-2-ai1., 1enebistiazo.1iny or beizselenazo.cnna 1.chi side products of the thia- and seleniumcarbocyanines, containing these properties, are treated with diluted mineral acids nrn elevated temperature.