Pyridine → HCID 73793969, compound

Participants

Reaction Steps

1,2-Dihydro-4-phenylpyrido[2,1-b]benzothiazolium perchlorate (2.0 g., 0.0055 mole), 2-phenylthio-3-ethylbenzothiazolium iodide (2.19 g., 0.0055 mole) and pyridine (30 ml.) are heated to reflux for 3 minutes, the solution is cooled, diethyl ether (30 ml.) is added and the green solution is decanted off from the oily dye. Water is added and the dye solidifies upon cooling. The solid dye is boiled out with isopropyl alcohol. The yield of dye is 1.0 g. (35% yield). The product has a melting point of 120°-128° C with an absorption maximum at 629 nm.

Provenance & Evidence