在常温常压下保持稳定。
3,4-脱氢-L-脯氨酸可作为医药合成中间体。该物质可通过D,L-3,4-脱氢脯氨酸为原料,经反应生成L-3,4-脱氢脯氨酸(+)酒石酸盐,并进一步反应制备得到3,4-脱氢-L-脯氨酸。
We evaluated the substrate specificities of four proline cis-selective hydroxylases toward the efficient synthesis of proline derivatives. In an initial evaluation, 15 proline-related compounds were investigated as substrates. In addition to l-proline and l-pipecolinic acid, we found that 3,4-dehydro-l-proline, l-azetidine-2-carboxylic acid, cis-3-hydroxy-l-proline, and l-thioproline were also oxygenated. Subsequently, the product structures were determined, revealing cis-3,4-epoxy-l-proline, cis-3-hydroxy-l-azetidine-2-carboxylic acid, and 2,3-cis-3,4-cis-3,4-dihydroxy-l-proline.
(2S,4R)-N-Benzyloxycarbonyl-4-tosyloxyproline methyl ester, readily prepared from commercially available (2S,4R)-N-benzyl-oxycarbonyl-4-hydroxyproline, was converted to (S)-3,4-dehydroproline of high enantiomeric purity by a process which involved a highly regioselective phenylselenoxide elimination to introduce the olefinic function.