A new catalytic asymmetric approach to polyfunctional aldol products mediated by zinc organometallics
作者:Paul Knochel、Walter Brieden、Michael J. Rozema、Christina Eisenberg
DOI:10.1016/s0040-4039(00)73804-4
日期:1993.9
The catalytic asymmetric addition of functionalized dialkylzincs to beta-alkoxyaldehydes provides after a short sequence of functional group interconversions aldol products in 40-99% ee. Their stereoselective transformation to either syn- or anti-1,3-diols has been performed.
Synthesis of all of the four energetically possible stereoisomers of 7-ethyl-2-methyl-1,6-dioxaspiro[4.5]decane
作者:Kenji Mori、Masaya Ikunaka
DOI:10.1016/s0040-4020(01)91498-x
日期:1984.1
Carbon Hydroxylation of Alkyltetrahydropyranols: A Paradigm for Spiroacetal Biosynthesis in <i>Bactrocera </i>sp.
作者:Jeanette E. Stok、Cheng-Shan Lang、Brett D. Schwartz、Mary T. Fletcher、William Kitching、James J. De Voss
DOI:10.1021/ol0069047
日期:2001.2.1
[GRAPHICS]In a number of Bactrocera species the penultimate step in the biosynthesis of spiroacetals is shown to be the hydroxylation of an alkyltetrahydropyranol followed by cyclization, The monooxygenases that catalyze this side chain hydroxylation show a strong preference for oxidation four carbons from the hemiketal center, to produce the spiroacetal, The hydroxy spiroacetals observed in Bactrocera appear to derive from direct oxidation of the parent spiroacetals and not from alternate precursors.
MORI, KENJI;IKUNAKA, MASAYA, TETRAHEDRON, 1984, 40, N 18, 3471-3479