反应详情

To a solution of [2-(2-amino-5-chlorophenyl)-1-(4-methoxyphenyl)ethyl]propanedioic acid, dimethyl ester (23.2 g, 59.2 mmole) in methanol (200 ml) was added a 25% solution of sodium methoxide in methanol (16 ml, 69.97 mmole). The solution was refluxed for 3 hours under argon. The reaction was cooled to room temperature and treated with 200 ml of 1N hydrochloric acid. The white precipitate was filtered and washed with water, methanol, and dried in vacuo to yield 19.5 g of the title compound, melting point 189°-190.5° C.

1. temperatureThe solution was refluxed for 3 hours under argon
2. filtrationThe white precipitate was filtered
3. washwashed with water, methanol
4. customdried in vacuo