Phenyl isocyanate → 9-Xanthenylmethyl Carbanilate

Participants

Reaction Conditions

Reaction Steps

To a mixture of 1.0 g of 9-xanthenemethanol and 0.51 mL of phenyl isocyanate in 5.0 mL of dry benzene was added two drops of triethylamine. The mixture was heated in an oil bath at 80° C. for 20 hours and cooled in an ice bath for 2 hours. The precipitated crystals were filtered and rinsed with Skelly B to give 1.48 g (95.2%) of the crude urethane as white crystals. Recrystallization from EtOAc--Skelly B (5:1) gave 1.37 g (88.1%) of the pure Xmoc-aniline as white needles, m.p. 180°-181° C.; IR (KBr): 3350 (NH), 1705 (C=O) cm-1 ; 1H NMR (CDCl3): δ 4.30 (m, 3H, CHCH2O), 6.55 (b, 1H, NH , 6.90-7.40 (m, 13H, aryl).

Provenance & Evidence