Results 41 to 50 of about 13,320 (204)
Molecules, 2020 A highly efficient sulfonylation of para-quinone methides with sulfonyl hydrazines in water has been developed on the basis of the mode involving a tetrabutyl ammonium bromide (TBAB)-promoted sulfa-1,6-conjugated addition pathway.
Zhang-Qin Liu +5 more
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Sulfones: new reagents in organocatalysis
, 2010 The development of new asymmetric methodologies that afford different structures in an enantioselective fashion is one of the most exciting goals for chemists nowadays. In this subject, lately, the use of sulfones has become a fast growing field.
Alba, A.N.R. +5 more
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, 2021 A dioxygen-triggered oxosulfonylation/sulfonylation of unactivated olefins to achieve β-keto sulfones/sulfones has been developed. Interestingly, pluralistic mechanisms were found when different types of compounds were applied as substrates, and ...
Hang Gong (4258147) +4 more
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Synthesis of Chiral, Enantiopure Allylic Amines by the Julia Olefination of α-Amino Esters
Molecules, 2016 The four-step conversion of a series of N-Boc-protected l-amino acid methyl esters into enantiopure N-Boc allylamines by a modified Julia olefination is described. Key steps include the reaction of a lithiated phenylalkylsulfone with amino esters, giving
Fabio Benedetti +5 more
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Isomerisation of β-epoxy sulfones
, 1979 The base-catalyzed isomerisation of β-epoxy sulfones to γ-hydroxy αβ-unsaturated sulfones was shown by kinetic data, isotope effect and stereochemistry to involve an intramolecular synfacial 1-3 hydrogen migration with carbanion-like transition state.
Jana Poláková +2 more
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Reduction of Propargylic Sulfones to (Z)-Allylic Sulfones using Zinc and Ammonium Chloride. [PDF]
, 2007 NoPropargylic sulfones can be cis-hydrogenated using commercial zinc powder and ammonium chloride in THF¿water at room temperature, the major products being the corresponding (Z)-allylic sulfones.
Helen M. Sheldrake +4 more
core +1 more source
Dioxygen-Triggered Oxosulfonylation/Sulfonylation of Terminal Olefins toward Keto Sulfones/Sulfones
, 2021 A dioxygen-triggered oxosulfonylation/sulfonylation of unactivated olefins to achieve β-keto sulfones/sulfones has been developed. Interestingly, pluralistic mechanisms were found when different types of compounds were applied as substrates, and ...
Changqun Cai +9 more
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Crystal structure of 1,3-diallyl-1,3,3a,4,7,7a-hexahydro-4,7-methano-2-benzothiophene 2,2-dioxide
Acta Crystallographica Section E, 2014 The title compound C15H20O2S, was identified as a product of diallylation of the meso-isomer of the corresponding norbornene sulfone, and it is an achiral compound.
Sambasivarao Kotha, Rama Gunta
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Molecules, 2021 Chiral γ-ketothiols, thioacetates, thiobenzoate, disulfides, sulfones, thiosulfonates, and sulfonic acids were obtained from β-pinene for the first time.
Olga M. Lezina +4 more
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Synthesis and Reactions of 2-Chlorovinyl Sulfones
, 2011 Synthesis and Reactions of 2-Chlorovinyl Sulfones Methods for the preparation of unsubstituted (E)-2-chlorovinyl sulfo-nes are reviewed. Literature data on substitution of chlorine atom in 2-chlorovinyl sulfones leading to formation of different ...
E. Ābele, J. Višņevska
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