Phosphoric Acid → HCID 135837652, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of the compound of step B(157.600 g, 0.53 mol) and 100 ml of 85% phosphoric acid was heated for 0.5 hours in an oil bath at a temperature of 130° C. All the starting material was consumed and the desired product formed. The mixture was cooled, poured into 1200 ml of ice-water, and stirred. Precipitate formed and was filtered. The solid was washed with water, dried overnight to give 113.220 g of the title compound as brick-pink solid. 1H NMR (CDCl3) δ 1.85(s, 6H), 1.87(s, 3H), 2.34(s, 3H), 2.41(s, 3H), 2.44(s, 3H), 7.00(s, 2H) ppm.

Provenance & Evidence