期刊
BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY
卷 8, 期 -, 页码 1287-1292出版社
BEILSTEIN-INSTITUT
DOI: 10.3762/bjoc.8.146
关键词
cephalosporolides; chelation; spiroketals; stereocontrol; zinc chloride
The synthesis of four candidate stereoisomers of cephalosporolide H is described, made possible by a zinc-chelation strategy for controlling the stereochemistry of oxygenated 5,5-spiroketals. The same strategy likewise enables the first stereocontrolled synthesis of cephalosporolide E, which is typically isolated and prepared admixed with its spiroketal epimer, cephalosporolide F.
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