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Your search keyword '"Robert A. Stockman"' showing total 4 results
Start Over Author "Robert A. Stockman" Journal chemical communications (cambridge, england)
4 results on '"Robert A. Stockman"'

1. Isolation of stable non cyclic 1,2-disulfoxides. Revisiting the thermolysis of S-aryl sulfinimines

Author

Robert A. Stockman, José A. Souto, and Willian Lewis

Subjects
Chemistry, Aryl, Thermal decomposition, Metals and Alloys, Disproportionation, General Chemistry, Catalysis, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, chemistry.chemical_compound, Materials Chemistry, Ceramics and Composites, Organic chemistry, Sulfenic acid, Thiosulfinate
Abstract

The thermolysis of S-aryl sulfinimines is shown to generate 1,2-disulfoxides and disulfides via initial Cope elimination, dimerisation of the produced sulfenic acid to a thiosulfinate, and subsequent disproportionation of the thiosulfinate.

Published
2014

2. Highly diastereoselective radical cyclisations of chiral sulfinimines

Author

Robert A. Stockman, William Lewis, Alexander G. Dossetter, and Elise M. Rochette

Subjects
chemistry.chemical_classification, Free Radicals, Molecular Structure, Radical, Aryl, Metals and Alloys, Sulfonium Compounds, Stereoisomerism, General Chemistry, Crystallography, X-Ray, Medicinal chemistry, Catalysis, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, chemistry.chemical_compound, chemistry, Intramolecular force, Materials Chemistry, Ceramics and Composites, Organic chemistry, Imines, Amines, Alkyl
Abstract

Chiral amines are formed by the highly diastereoselective intramolecular addition of alkyl and aryl radicals onto chiral mesityl sulfinimines.

Published
2013

3. Two-directional ring-opening cross-metathesis

Author

Diane Robbins, Jean-Christophe Legeay, Robert A. Stockman, P. Aggarwal, and Stephen J. Roe

Subjects
Stereochemistry, Chemistry, Metals and Alloys, General Chemistry, Metathesis, Ring (chemistry), Combinatorial chemistry, Catalysis, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Cyclic Alkenes, Chain (algebraic topology), Materials Chemistry, Ceramics and Composites, Selectivity
Abstract

Two-directional ring-opening cross-metathesis of a range of cyclic alkenes with a variety of electron deficient alkenes has been accomplished; it was found that the process is quite general and gives complete selectivity for the E,E-dienes, making this a very useful and high-yielding protocol for two-directional chain synthesis.

Published
2009

4. Combining two-directional synthesis and tandem reactions: new access to 3,5-disubstituted pyrrolizidines and first total synthesis of alkaloid cis-223B

Author

William Lewis, Robert A. Stockman, and Jean‐Christophe Legeay

Subjects
Models, Molecular, Tandem, Stereochemistry, Chemistry, Alkaloid, Metals and Alloys, Total synthesis, General Chemistry, Metathesis, Catalysis, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Cyclization, Yield (chemistry), Materials Chemistry, Ceramics and Composites, Michael reaction, Organic chemistry, Pyrrolizidine Alkaloids
Abstract

Two new tandem reactions for the synthesis of 3,5-disubstituted pyrrolizidines and the first total synthesis of alkaloid cis-223B (in 7 steps and 43% overall yield), involving a double cross metathesis and double Michael addition as key steps, are presented.

Published
2009

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