Ethanol → Indoaniline

Participants

Reaction Steps

150 ml of ethanol was added to 3.7 g of 2-methylsulfonylaminophenol of the following structural formula: ##STR108## and 5.24 g of a compound of the following structural formula: ##STR109## stirred at room temperature, and then a solution of 3.4 g of silver nitrate in 15 ml of water was added dropwise. 15 ml of a 28% ammonia water was added thereto, further a solution of 1.5 g of silver nitrate in 10 ml of water was added dropwise, and the reaction was effected at 30°-40° C. for 3 hours. After completion of the reaction, it was extracted with chloroform, the solvent was distilled off, and the residue was purified by column chromatography using chloroform to obtain 5.27 g (yield 76% based on the theoretical yield) of a purified product of an indoaniline type dye of the following structural formula: ##STR110## The dye thus obtained had a melting pont of 135°-137° C. and a maximum absorption wavelength (chloroform) of 640 nm.

Provenance & Evidence