Methyl Isocyanate → N-Methyl-N'-(4,4-dimethyl-1,2,3,4-tetrahydro-1,3-dioxo-7-isoquinolinyl)-urea

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

3 g. (14.7 mMole) 7-amino-4,4-dimethylisoquinoline-1,3-dione were dissolved in 100 ml. methylene chloride, mixed with 5 ml. methyl isocyanate, while cooling, and then further stirred for 2 hours at 25° C. Subsequently, the reaction mixture was evaporated, cooled, filtered off with suction and recrystallised from methanol. Yield: 3.7 g. (96.4% of theory); m.p. 257°-258° C.

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