期刊
TETRAHEDRON-ASYMMETRY
卷 13, 期 8, 页码 795-799出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0957-4166(02)00189-1
关键词
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Aldol additions of metalated bis-lactim ethers derived from cyclo-[Gly-D-Val] 3A-E* to mismatched L-erythrose-derivatives 4a and 4b have been studied. Reactions of titanium(IV) and tin(II) azaenolates with the lactol derivative 4b allow direct and moderate (syn,syn)- or highly (anti,anti)-selective access to polyhydroxy amino acids that have been efficiently transformed into 1-deoxy-D-gulonojirimycin or 1-deoxy-D-allonojirimycin. (C) 2002 Elsevier Science Ltd. All rights reserved.
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