A Facile Synthesis of 3-Aryl Pyroglutamic Acid. Facile Synthesis of Baclofen and Chlorpheg.
โ Scribed by Meng-Yang Chang; Pei-Pei Sun; Shui-Tein Chen; Nein-Chen Chang
- Publisher
- John Wiley and Sons
- Year
- 2003
- Weight
- 110 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0931-7597
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We have reportedly2 that 1,1-dimethylhydrazine reacts with various dimethyl esters (vicinal and nonvicinal) to effect monodemethylation; providing a facile method for the synthesis of acid-esters. This report is the result of our investigation on the monodemethylation of a series of polycarboxylate
## Abstract Cyanoacetyldiazoindolโ2โone (**__3__**), the condensation product of cyanoacetohydrazide with isatin (**__1__**), could be cyclized in acidic medium via its C๏ฃพN group and its enolic OH to give cyanomethyloxadiazoleโspiroindoline (**__4__**). The presence of the methylcyano side chain co