Action des composes organomagnesiens sur les pyrones-2-VII
作者:P. Lhoste、M. Moreau、J. Dreux
DOI:10.1016/s0040-4020(01)91804-6
日期:1984.1
In the reaction between organomagnesiumcompounds and 2-pyrones, the relative stability of the 6-hydroxy 5,6-dihydro 2H-pyrans and their tautomeric forms (ketols) has no influence on the reaction pathway. When ethylenic ketols are obtained, the corresponding tautomeric dihydropyranols are prepared in a selective way by reaction of nucleophilic reagents on the 3,6-dihydro-2-pyrones. In the other hand
Synthesis of unsaturated hydroxy acids by the cobalt carbonyl and phase transfer catalyzed carbonylation of vinyl epoxides
作者:Howard Alper、Serge Calet
DOI:10.1016/s0040-4039(00)82036-5
日期:1988.1
Phase transfer catalyzedreaction of vinyl epoxides with carbonmonoxide, methyl iodide, catalytic amounts of cobaltcarbonyl and TDA-1, affords β-hydroxy acids. High regioselectivity was observed in some cases.
Synthesis of 2,6-Dideoxysugars via Ring-Closing Olefinic Metathesis
作者:Peter R. Andreana、Jason S. McLellan、Yongchen Chen、Peng George Wang
DOI:10.1021/ol026710m
日期:2002.10.1
graphicGrubbs' RuCl2(=CHPh)(PCy3)(2) (catalyst 1) and RuCl2(=CHPh)(PCy3)(IMess) (catalyst 2) complexes have been successfully utilized in the construction of beta,gamma-unsaturated delta-lactones containing various substitution patterns of methyl groups. Asymmetric dihydroxylation followed by reduction leads to 3,4-cis-dihydroxy-2,6-dideoxypyranoses, which have proven to play very important biological roles as key components of natural products.
AUMANN R.; RING H.; KRUER C.; GODDARD R., CHEM. BER., 1979, NO 11, 3644-3671
作者:AUMANN R.、 RING H.、 KRUER C.、 GODDARD R.
DOI:——
日期:——
LHOSTE, P.;MOREAU, M.;DREUX, J., TETRAHEDRON, 1984, 40, N 9, 1551-1561