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A convenient and high yield method to prepare 4-hydroxypyroglutamic acids

✍ Scribed by Xiaojun Zhang; Aaron C. Schmitt; Wen Jiang

Publisher: Elsevier Science
Year: 2001
Tongue: French
Weight: 64 KB
Volume: 42
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)01030-9

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✦ Synopsis

RuO 2 /NaIO 4 oxidation of N-Boc-4-silyloxy and 4-acetoxy proline methyl esters under ethyl acetate/water biphase condition gave N-Boc-4-silyloxy and 4-acetoxy pyroglutamic acid derivatives in high yields. Desilylation with TBAF afforded both cis-and trans-N-Boc-methyl-4-hydroxy pyroglutamates.

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