Hydrogen Peroxide → 5-Isoxazoleacetic acid, 3,4-bis(4-methoxyphenyl)-, methyl ester

Participants

Reaction Conditions

Reaction Steps

A 1.2 g (3.38 mmols) quantity of methyl 5-hydroxyimino-4,5-bis(4-methoxyphenyl)-3-pentenoate was dissolved in 19 ml of acetic acid, and the solution was added dropwise to a suspension composed of 0.44 g (5.1 mmols) of manganese dioxide and 5 ml of acetic acid at 60° C. After the completion of addition, the mixture was stirred at 60° C. for one hour. After the completion of reaction, hydrogen peroxide was added to the reaction mixture to decompose excess manganese dioxide. The same procedure as in Example 3 was thereafter repeated to obtain 0.78 g (yield 65%) of the above-identified product.

Provenance & Evidence