Enantioselective synthesis of optically pure (R)- and (S)-β-lysine via nitrone cycloaddition
作者:David Keirs、David Moffat、Karl Overton
DOI:10.1039/c39880000654
日期:——
Optically pure (R)- and (S)-β-lysines have been obtained via cycloaddition of chiral nitrone (4) to vinyl acetate, followed by facile chromatographic separation of the four resulting acetates (5) into two pairs of C-5 epimers and conversion of each pair into diastereoisomerically pure isoxazolidinone (7a or b).
光学纯的(R)-和(S)-β-赖氨酸是通过将手性硝酮(4)环合到乙酸乙烯酯中,然后将四个所得的乙酸酯(5)容易地色谱分离成两对C-5差向异构体而获得的并将每对转化为非对映异构纯的异恶唑烷酮(7a或b)。