Diphosgene → 2-Methyl-5-phenylbenzylisocyanate

Participants

Reaction Steps

2.5 g (12.6 mmol) of diphosgene, 0.40 g of activated carbon and 30 ml of toluene were mixed, and allowed to left overnight, and to this solution was slowly dropped at room temperature a solution prepared by dissolving 1.00 g (5.07 mmol) of 2-methyl-5-phenylbenzylamine (produced in the same manner as in Intermediate Production Example 6) in 5 ml of toluene. The reaction mixture turned to white suspension directly after the dropping. The white suspension was stirred at room temperature for 1 hour, further stirred for 5 hours under reflux with heating, then, concentrated under reduced pressure to obtain 1.13 g of 2-methyl-5-phenybenzyl isocyanate.

Provenance & Evidence