Zobrazeno 1 - 10
of 35
pro vyhledávání: '"J. M. Palazon"'
Publikováno v:
The Journal of Organic Chemistry. 62:4584-4590
A computational study at the ab initio level of the cyclization of (E)- and (Z)-7-hydroxy-4-substituted-2,3-unsaturated esters leading to 2,3-disubstituted tetrahydropyrans has been performed. The study showed the requirement of coordination between
Autor:
Víctor S. Martín, J. M. Palazon, José M. Padrón, Miguel A. Ramirez, Juan Manuel Betancort, Marcos A. Soler
Publikováno v:
The Journal of Organic Chemistry. 62:4570-4583
A systematic approach to the enantiomeric synthesis of all possible diastereoisomers of 2,6-dialkyl-3,5-dioxytetrahydropyrans is described. The key step in the described methodology is the intramolecular cyclization of enantiomerically enriched (≥9
Publikováno v:
Carbohydrate research. 352
A series of carbasugars were prepared and their conformational properties studied by means of NMR spectroscopy. The results were compared to those previously found for O-, S-, and C-β-glycoside analogs. While the rotational populations of the hydrox
Publikováno v:
Tetrahedron Letters. 34:5467-5470
A methodology based on intramolecular hetero-Michael addition of properly functionalized alkoxy-γ-benzoyloxy-α,β-unsaturated esters for the synthesis of highly substituted and fused poly-tetrahydropyran nuclei of marine polyether toxins with absol
Publikováno v:
Tetrahedron Letters. 34:5471-5474
The use of an intramolecular hetero-Michael addition of enantiomerically enriched 7-alkoxy-4-benzoyloxy-2,3-unsaturated esters for the synthesis of endo-substituted oxepanes is described. The stereochemistry in the cyclization step is governed by the
Publikováno v:
ChemInform. 23
A procedure for the oxidation of sulfides to sulfones using ruthenium tetroxide as catalyst and periodic acid as stoichiometric oxidant in a biphasic system (CCl 4 , CH 3 CN, H 2 O) is reported.
Publikováno v:
ChemInform. 23
The regioselective opening with benzoic acid of 2,3-epoxy alcohols obtained from the asymmetric epoxidation of 2,3-allylic alcohols, and deoxygenation of the resulting diol benzoales provides an effective, general and simple method to convert chiral
Autor:
J. M. Palazon, Víctor S. Martín
Publikováno v:
ChemInform. 23
The stereoselective synthesis of enantiomerically enriched endo-substituted halotetrahydropyrans by an intramolecular Michael addition of a suitable chiral γ=halo-α,β-unsaturated ester is described.
Publikováno v:
ChemInform. 24
Publikováno v:
ChemInform. 25