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Enantioselective addition of a chiral thiazolidinethione-derived titanium enolate to acetals.
High stereoselectivities have been achieved for the Lewis acid-mediated cross-coupling reaction of dimethyl acetals to a chiral 1,3-thiazolidine-2-thione-derived titanium enolate that affords enantiopure anti alpha-methyl-beta-alkoxy carbonyl compounds in a wide range of acetals.
New Synthetic “tricks”. [Et3NH][Sn(SPh3)] and Bu2SnH2, two useful reagents for the reduction of azides to amines
Unprecedented Highly Stereoselective α- and β-C-Glycosidation with Chiral Titanium Enolates.
Synthesis of six-membered oxygenated heterocycles through carbon-oxygen bond-forming reactions
New procedure for the direct generation of titanium enolates. Diastereoselective bond constructions with representative electrophiles
Les enolates de titane sont prepares a partir des precurseurs carbonyles correspondants avec TiCl 4 et une amine tertiaire, dans des conditions douces
Stereoselective aldol reactions of chlorotitanium enolates. An efficient method for the assemblage of polypropionate-related synthons
or a decrease in the aggregation of silyl ion pairs in the presence of THF. Polymerization in a mixture of benzene (40%) and THF (60%) is completed within less than 2 min at the same initiator…
Simple and Efficient Preparation of Ketones from Morpholine Amides
Morpholine-derived amides react with RMgX to give the corresponding ketones in good yield. The mild conditions required and low cost of starting materials make this method very appealing for large…
A fast procedure for the reduction of azides and nitro compounds based on the reducing ability of Sn(SR)3-species
Stereoselective and Catalytic Synthesis of anti-β-Alkoxy-α-azido Carboxylic Derivatives.
- Javier Fernández-Valparís, P. Romea, F. Urpí, M. Font‐Bardia
- ChemistryOrganic letters
- 21 November 2017
Direct addition of a chiral N-azidoacetyl thiazolidinethione to a variety of dialkyl acetals catalyzed by a commercially available and structurally simple nickel(II) complex gives access in good…
Catalytic Staudinger-Vilarrasa reaction for the direct ligation of carboxylic acids and azides.
- J. Burés, Manuel Martín, F. Urpí, J. Vilarrasa
- ChemistryThe Journal of organic chemistry
- 9 February 2009
2,2'-Dipyridyl diselenide (PySeSePy) is the catalyst or activator of choice for the direct reaction of carboxylic acids with azides and trimethylphosphine at room temperature. The mechanism of the…