反应详情

温度

4 °C

α,α-Dimethylbenzylchloride was prepared by passing a stream of dry halogen chloride gas through a solution of methylene dichloride (750 ml) and α-methylstyrene (500 g, 4.2 moles) at 4° C. The reaction and work-up were the same as employed for the preparation of 2,6-Bis(1-isocyanato-1-methylethyl)naphthalene described in Example 8. The resulting monochloride was dissolved in 750 ml. methylene dichloride and was added to a cooled (4° C.) catalyst solution previously prepared from anhydrous, 90% sodium cyanate (389 g, 5.39 moles), pyridine (50 ml, 0.633 mole), zinc chloride (39.15 g, 0.28 mole) and 1 ml H2O in 1075 ml. methylene dichloride. At this point the reaction mixture contained 0.04% by weight of water.

1. customat 4° C
2. customThe reaction