The solution of (3-isopropenyl-2-ox

The solution of (3-isopropenyl-2-oxo-2,3-dihydrobenzoimidazol-
1-yl)-acetic acid (3.33 g, 17.79 mmol) in
methanol (20 mL) was stirred with IN NaOH (19.19 ml,
19.18 mmol) at room temperature overnight. The solvent
was evaporated and the residue dissolved in water and
acidified with IN HCl. The precipitate was filtered off,
washed with water and dried under vacuum to give 2.7 g
(91% yield) of (3-isopropenyl-2-oxo-2,3-dihydro-benzoimidazol-
1-yl)-acetic acid as a white solid:

結果 (中文) 1:

(3-isopropenyl-2-oxo-2,3-dihydrobenzoimidazol-的解决方案1-基)-醋中的醋酸 (3.33 g，17.79 毫摩尔)与在氢氧化钠 (19.19 毫升，打动了甲醇 (20 毫升)19.18 mmol) 在室温下过夜。溶剂被蒸发和残留物溶解在水中和用中盐酸酸化。沉淀物被过滤掉，洗水与干下真空给 2.7 g(91%的收益率) 的 (3-isopropenyl-2-oxo-2,3-dihydro-benzoimidazol-1-基)-乙酸为白色固体:

結果 (中文) 3:

解（3-isopropenyl-2-oxo-2,3-dihydrobenzoimidazol -
影响）-乙酸（3.33克，17.79毫摩尔）在
甲醇（20毫升）搅拌在NaOH（19.19毫升，
19.18毫摩尔）在室温下过夜。溶剂
蒸发，残留物溶于水和
盐酸酸化。沉淀过滤掉，用水冲洗，真空干燥，给2.7克（91%收益率）的（3-isopropenyl-2-oxo-2,3-dihydro-benzoimidazol -
影响）-乙酸为白色固体：