Results 131 to 140 of about 32,736 (165)

ChemInform Abstract: Kinetics and Mechanism of the Oxidation of Some Heterocyclic Secondary Alcohols by N‐Bromoacetamide in Acid Medium.

Chemischer Informationsdienst, 1986
AbstractDie Oxidation der Alkohole (I) und ihrer schneller reagierenden äquatorialen Epimeren ist bei konstanter HClO4‐Konzentration von‐ jeweils 1. Ordnung bezüglich beider Reaktionspartner und von ‐ 1. Ordnung in bezug auf das entstehende Acetamid.
M. JAMBULINGAM, P. NANJAPPAN, K. NATARAJAN, J. NAGALINGAM, M. PALANISWAMY, N. SIVAKUMAR, V. PREKUMAR, K. RAMARAJAN   +7 more
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Acceptorless Dehydrogenation of N-Heterocycles and Secondary Alcohols by Ru(II)-NNC Complexes Bearing a Pyrazoyl-indolyl-pyridine Ligand

Organometallics, 2018
Ruthenium(II) hydride complexes bearing a pyrazolyl-(2-indol-1-yl)-pyridine ligand were synthesized and structurally characterized by NMR analysis and X-ray single crystal crystallographic determinations. These complexes efficiently catalyzed acceptorless dehydrogenation of N-heterocycles and secondary alcohols, respectively, exhibiting highly ...
Qingfu Wang, Huining Chai, Zhengkun Yu
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ChemInform Abstract: An Efficient and Recyclable Catalyst for N‐Alkylation of Amines and β‐Alkylation of Secondary Alcohols with Primary Alcohols: SBA‐15 Supported N‐Heterocyclic Carbene Iridium Complex.

ChemInform, 2013
AbstractThe catalyst can be recovered by simple filtration and reused eight or twelve times (β‐alkylation resp.
Dong Wang, Xu‐Qing Guo, Chen‐Xi Wang, Ya‐Nong Wang, Rui Zhong, Xiao‐Han Zhu, Li‐Hua Cai, Zi‐Wei Gao, Xiu‐Feng Hou   +8 more
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ChemInform Abstract: Rapid and Selective Catalytic Oxidation of Secondary Alcohols at Room Temperature by Using (N‐Heterocyclic Carbene)—Ni⁰ Systems.

ChemInform, 2010
AbstractThe use of 2,4‐dichlorotoluene as a solvent is crucial to shorten the reaction time from hours (in dioxane) to minutes.
Christophe Berini, Ole H. Winkelmann, Jennifer Otten, David A. Vicic, Oscar Navarro   +4 more
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Ruthenium-Catalyzed β-Alkylation of Secondary Alcohols and α-Alkylation of Ketones via Borrowing Hydrogen: Dramatic Influence of the Pendant N-Heterocycle

Organometallics, 2019
Three bidentate ruthenium(II) complexes with a pyridonate fragment were prepared and fully characterized. These complexes are structurally similar, but differ in their pendant substituents. Complex 1 contains a phenyl unit, whereas complexes 2 and 3 have uncoordinated thienyl and thiazolyl groups, respectively.
Chong Zhang, Jiong-Peng Zhao, Bowen Hu, Jing Shi, Dafa Chen   +4 more
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ChemInform Abstract: Kinetics of the Oxidation of Heterocyclic Secondary Alcohols by N‐ Chloro‐r‐2,c‐6‐diphenyl‐t‐3‐methylpiperidin‐4‐one (NCP) in Perchloric Acid Medium

ChemInform, 1994
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
K. SELVARAJ, V. VENKATESWARAN, K. RAMARAJAN   +2 more
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Preparation of a Series of “Ru(p-cymene)” Complexes with Different N-Heterocyclic Carbene Ligands for the Catalytic β-Alkylation of Secondary Alcohols and Dimerization of Phenylacetylene

Organometallics, 2008
A series of five different “(p-cymene)Ru(NHC)” complexes (NHC = imidazolin-2-ylidene, imidazolin-4-ylidene, and pyrazolin-3-ylidene) have been obtained and fully characterized. The crystal structure of two of the new complexes has been determined by X-ray diffraction methods.
Amparo Prades, Mónica Viciano, Mercedes Sanaú, Eduardo Peris   +3 more
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H₃PO₂-Catalyzed Intramolecular Stereospecific Substitution of the Hydroxyl Group in Enantioenriched Secondary Alcohols by N-, O-, and S-Centered Nucleophiles to Generate Heterocycles

ACS Catalysis, 2019
The direct intramolecular stereospecific substitution of the hydroxyl group in stereogenic secondary alcohols was successfully accomplished by phosphinic acid catalysis.
Anon Bunrit, Pemikar Srifa, Thanya Rukkijakan, Christian Dahlstrand, Genping Huang, Srijit Biswas, Rahul A. Watile, Joseph S. M. Samec   +7 more
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Transition metal-free transfer hydrogenation of aryl azides with alcohols: direct synthesis of secondary amines and N-heterocycles

Organic Chemistry Frontiers
A transfer hydrogenation of aryl azides with alcohols, promoted exclusively by alkali metal bases, has been developed. This protocol enables efficient C–N bond formation and is broadly applicable to the synthesis of diverse N-heterocycles.
Jinwoo Lee, Ramachandra Reddy Putta, Junhwa Hong, Seung Hyun Choi, Honghui Lee, Seok Beom Lee, Suckchang Hong   +6 more
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Kinetics of oxidation of heterocyclic secondary alcohols by N‐chloro‐r‐2,c‐6‐diphenyl‐t‐3 methyl piperidin‐4‐one (NCP) in perchloric acid medium

International Journal of Chemical Kinetics, 1994
AbstractAn investigation of the kinetics of oxidation of epimeric piperidin‐4‐ols, oxan‐4‐ols, and cyclohexanol by N‐chloro‐r‐2, c‐6‐diphenyl‐t‐3‐methylpiperidin‐4‐one (NCP) in aqueous acetic acid in the presence of perchloric acid shows that the reaction is first‐order each in substrate and oxidant.
Kuppusamy Selvaraj, Vinayagam Venkateswaran, Krishnasamy Ramarajan   +2 more
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