Реакция #3209

Уравнение реакции

2-amino-6-methoxybenzoic acid

bis(trichloromethyl)carbonate

→

title compound

5-methoxy-2H-3,1-benzoxazine-2,4(1H)-dione

Растворители

tetrahydrofuran

Условия реакции

Обработка

1. 1
   Другоеwhereupon a tan precipitate formed
2. 2
   Температураcooled
3. 3
   Фильтрацияfiltered
4. 4
   Температураcool
5. 5
   Другоеdried

Методика

To a stirred warm (50° C.) solution of 2-amino-6-methoxybenzoic acid (2.70 g, 16.2 mM) in tetrahydrofuran (25 mL) under a nitrogen atmosphere was added bis(trichloromethyl)carbonate (1.60 g, 5.38 mM), whereupon a tan precipitate formed. The reaction mixture was maintained at 50° C. for 30 min, cooled, rewarmed to 50° C. for 30 min, filtered cool and dried to provide the title compound (2.95 g, 94.6%) as an off-white solid; MS(CI): 194 (M+H).

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