Results 351 to 360 of about 60,682 (387)
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Revisit to the sulfonation of pyrroles: is the sulfonation position correct?
Tetrahedron Letters, 2000Abstract Sulfonation of pyrrole and its 1-methyl derivatives with a sulfur trioxide–pyridine complex was found to give 3-sulfonated pyrroles, but not 2-sulfonates as described in textbooks. The replacement of 1-methyl-2-tri-n-butylstannylpyrrole with trimethylsilyl chlorosulfonate, followed by quenching with aq.
Akira Mizuno +6 more
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Visible light activation enables desulfonylative cross-coupling of glycosyl sulfones
Nature Synthesis, 2022Quanquan Wang +5 more
semanticscholar +1 more source
Israel Journal of Chemistry, 1974
AbstractThe sulfonation of polyamides (Nylons‐3,6,11 and 6,6) was investigated using fuming sulfuric acid and solutions of SO3 in CCl4. The sulfonated polymers were soluble in water and insoluble in ethanol. Acid hydrolysis of the polymers and quantitative determination of the amino acids in the hydrolysate showed the presence of α‐sulfo amino acids ...
Albert Zilkha, Jacob Vaya
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AbstractThe sulfonation of polyamides (Nylons‐3,6,11 and 6,6) was investigated using fuming sulfuric acid and solutions of SO3 in CCl4. The sulfonated polymers were soluble in water and insoluble in ethanol. Acid hydrolysis of the polymers and quantitative determination of the amino acids in the hydrolysate showed the presence of α‐sulfo amino acids ...
Albert Zilkha, Jacob Vaya
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Angewandte Chemie, 2018
A highly regio- and enantioselective hydrogenation of challenging tetrasubstituted allenyl sulfones has been developed, affording chiral allylic sulfones in good yields with excellent regio- and enantioselectivities (up to 99 % yield and 99 % ee).
J. Long +4 more
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A highly regio- and enantioselective hydrogenation of challenging tetrasubstituted allenyl sulfones has been developed, affording chiral allylic sulfones in good yields with excellent regio- and enantioselectivities (up to 99 % yield and 99 % ee).
J. Long +4 more
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Journal of Organic Chemistry, 2018
The development of first-row-transition-metal catalysts that can match with the reactivities of the noble metals is considered to be challenging yet very much a desirable goal in homogeneous catalysis.
Satyadeep Waiba +2 more
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The development of first-row-transition-metal catalysts that can match with the reactivities of the noble metals is considered to be challenging yet very much a desirable goal in homogeneous catalysis.
Satyadeep Waiba +2 more
semanticscholar +1 more source
The metabolism of the surfactants dodecyl sulfonate and hexadecyl sulfonate in the rat
Toxicology and Applied Pharmacology, 1978Abstract When [1-14C]dodecyl sulfonate and [1-14C]hexadecyl sulfonate were administered orally and ip to free-ranging rats and iv to anesthetized rats, the major route of excretion of radioactivity was urinary. Small amounts only of parent surfactant appeared in the feces of animals dosed orally with [1-14C]dodecyl sulfonate, but large amounts of [1 ...
Douglas Howes +3 more
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Journal of Membrane Science, 2018
Abstract Composite cation exchange membranes (C-CEMs) based on mainchain sulfonated polyether sulfone (SPES) and polyvinyl pyrrolidone (PVP) have been prepared and the effects of hydrophilicity on C-CEM properties investigated in a previous work. In this study, membrane properties were optimized by investigating the effects of degrees of sulfonation (
Lin Guo, Jianyou Wang, Jinli Zhao
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Abstract Composite cation exchange membranes (C-CEMs) based on mainchain sulfonated polyether sulfone (SPES) and polyvinyl pyrrolidone (PVP) have been prepared and the effects of hydrophilicity on C-CEM properties investigated in a previous work. In this study, membrane properties were optimized by investigating the effects of degrees of sulfonation (
Lin Guo, Jianyou Wang, Jinli Zhao
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The polysulfonylamines bis(methylsulfonamido) sulfone and bis(trifluoromethylsulfonamido) sulfone
Acta Crystallographica Section C Crystal Structure Communications, 2003Bis(methylsulfonamido) sulfone, C(2)H(8)N(2)O(6)S(3) or SO(2)(NHSO(2)CH(3))(2), was synthesized from imidobis(sulfonyl chloride), HN(SO(2)Cl)(2), and bis(trimethylsilyl)methane, CH(2)[Si(CH(3))(3)](2), in chlorotrimethylsilane solution. In the solid state, there are two independent molecules linked by two N-H...O hydrogen bridges into infinite chains ...
Zdirad Žák, Jan Taraba
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A Protocol To Transform Sulfones into Nitrones and Aldehydes.
Organic Letters, 2018A simple method to transform sulfones into nitrones and therefore into the corresponding carbonyl derivatives has been developed. Some examples demonstrate that it is a new reliable and versatile reaction in the toolbox of sulfones that has great ...
Eduardo Rodrigo, I. Alonso, M. Cid
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Journal of the American Oil Chemists' Society, 1952
SummaryPatent and technical literature contain a wide variety of references to sulfation and sulfonation. Many of these relate to methods specific for individual compounds or substituted functional groups, or to involved methods undesirable for commercial plant operation.
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SummaryPatent and technical literature contain a wide variety of references to sulfation and sulfonation. Many of these relate to methods specific for individual compounds or substituted functional groups, or to involved methods undesirable for commercial plant operation.
openaire +2 more sources