反应详情

3-(2,2-Dimethoxyethylthio)phenol (1.80 grams) dissolved in benzene (5 ml) was charged into a glass reaction vessel equipped with a mechanical stirrer. Methyl isocyanate (12 ml) and trimethylamine (2 drops) were then added, and the resulting mixture was stirred at room temperature for a period of about 51/2 hours. The mixture was then allowed to stand overnight and was then stripped of excess methyl isocyanate and a portion of the benzene. The concentrated solution was then added to ether and cooled to -60° C., resulting in a precipitate. The precipitate was recrystallized from ether to yield the desired product O-[3-(2,2-dimethoxyethylthio)phenyl]-0 N-methylcarbamate having a melt point of 46° to 48° C.

1. additionwas charged into a glass reaction vessel
2. customequipped with a mechanical stirrer
3. waitto stand overnight
4. temperaturecooled to -60° C.
5. customresulting in a precipitate
6. customThe precipitate was recrystallized from ether