WATER SOLUBLE METHINE COMPOUND

摘要

PURPOSE:To obtain a new compound having excellent solubility and color tone sifted to shorter wavelength and useful as a photographic material, medicine, etc. CONSTITUTION:A compound of the formula [Z1 an Z2 are nonmetallic atom group necessary for forming 5-6 membered nitrogen-containing heterocyclic ring; R1 and R2 are alkyl; X is inorganic anion; k is number necessary for controlling electron charge in the molecule to 0; (n) is 0 or 1; etc.), e.g. 1- ethyl-2{[3-ethyl-5-(3-methylbenzothiazoline-2-ylidene)]-4-oxothiazolid ine-2- ylideneamino}pyridinium-2=iodide. The compound of the formula is obtained by reacting 3-ethyl-5-(3-methylbenzothiazoline-2-ylidene)-2-methylthio-4-oxo-2- thiazolium=p-toluenesulfonate with 2-amino-l-ethylpyridinium=iodide in the presence of triethylamine in an acetonitrile solvent.