Ethanol → HCID 178466072, compound

Participants

Reaction Steps

To a solution of 2-(4'-ethoxyphenyl)-4-(4' -dimethylaminophenyl)- 6-phenylthiapyrylium chloride, 8.95 g, in a hot mixture of water, 400 mls, and ethanol, 100 mls, is added briskly a solution of Methyl Orange, E.K. 432, 7.0 g, in hot water, 200 mls, containing approximately 25 mls ethanol. Some precipitate comes out of solution immediately and quickly solidifies, and more crystallizes out as the mixture cools. The solid is readily filtered from the cool mixture, and is taken up in hot ethanol, filtered, evaporated down and allowed to cool slowly overnight. The solid that comes down is filtered off and dried at room temperature at 60 mm pressure overnight. Yield 11.1 g having structural formula III noted above and exhibiting light absorption maxima (when dissolved in ethanol) at 578 and 425 nm.

Provenance & Evidence