期刊
TETRAHEDRON-ASYMMETRY
卷 17, 期 15, 页码 2195-2198出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetasy.2006.07.044
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We have developed a chemoenzymatic synthesis of (S)-vertinolide 1 with a chiral quaternary carbon atom at C5. In the kinetic resolution of tetronic acid precursor 6, lipase PS-D furnished the recovered alcohol 6 with an (R)-stereochemistry in a ratio of 95% ee, whereas lipase AY gave (S)-alcohol 6 with 93% ee. Chemical transformations of (S)-alcohol 6 provided (S)-vertinolide 1 in 33% yield in five steps with no loss of enantiomeric excess. (c) 2006 Elsevier Ltd. All rights reserved.
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