نتایج جستجو برای: higher alcohols synthesis has

تعداد نتایج: 3660605  

2001
J C Slaa J G Van Ommen J R H Ross

This paper gives a review of research work in the synthesis of higher alcohols over catalysts based on Cu/ZnO/Al,O,, emphasizing three main topics: (i) the effect on selectivity of the addition of several compounds to this catalyst, (ii) the effect on selectivity of the reaction conditions used, and (iii) the reaction network leading to the different products found. Although the use of aLkali c...

Journal: :Molecules 2009
Michael Klein Karin Krainz Itedale Namro Redwan Peter Dinér Morten Grøtli

A versatile method for the synthesis of chiral 1,4-disubstituted-1,2,3-triazole derivatives starting from easily accessible naturally occurring D-or L-amino acids as chiral synthons is described. The amino acids were converted into azido alcohols, followed by copper catalyzed [3+2] cycloaddition reactions between the azido alcohols and methyl propiolate and subsequent ester aminolysis with prim...

Journal: :Science 2011
Guangbin Dong Peili Teo Zachary K Wickens Robert H Grubbs

Alcohol synthesis is critical to the chemical and pharmaceutical industries. The addition of water across olefins to form primary alcohols (anti-Markovnikov olefin hydration) would be a broadly useful reaction but has largely proven elusive; an indirect hydroboration/oxidation sequence requiring stoichiometric borane and oxidant is currently the most practical methodology. Here, we report a mor...

Journal: :Catalysts 2022

This review is dedicated to the state-of-the art routes used for synthesis of CO2-based (a)cyclic carbonates and polycarbonates from alcohol substrates, with an emphasis on their respective main advantages limitations. The first section reviews organic such as dialkyl or cyclic carbonation alcohols. Many different synthetic strategies have been reported (dehydrative condensation, alkylation rou...

Journal: :Organic & biomolecular chemistry 2004
Keith Smith Sandra Lock Gamal A El-Hiti Makoto Wada Norikazu Miyoshi

A new and convenient procedure for synthesis of homoallylic alcohols in generally good to excellent yields has been developed. The bismuth-mediated Barbier-type allylation of aldehydes (aromatic, aliphatic, alicyclic and heterocyclic) with allyl bromide has been carried out smoothly in water in the presence of fluoride ions.

2014
Mahesh K Lakshman Manish K Singh Mukesh Kumar Raghu Ram Chamala Vijayender R Yedulla Domenick Wagner Evan Leung Lijia Yang Asha Matin Sadia Ahmad

(1H-Benzo[d][1,2,3]triazol-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate (BOP), 1H-benzo[d][1,2,3]triazol-1-yl 4-methylbenzenesulfonate (Bt-OTs), and 3H-[1,2,3]triazolo[4,5-b]pyridine-3-yl 4-methylbenzenesulfonate (At-OTs) are classically utilized in peptide synthesis for amide-bond formation. However, a previously undescribed reaction of these compounds with alcohols in the presen...

2017
Shuxin Liu Jiabin Liu Jiayin Hou Nan Chao Ying Gai Xiangning Jiang

BACKGROUND 4-Hydroxycinnamyl alcohols are a class of natural plant secondary metabolites that include p-coumaryl alcohol, caffeyl alcohol, coniferyl alcohol and sinapyl alcohol, and have physiological, ecological and biomedical significance. While it is necessary to investigate the biological pathways and economic value of these alcohols, research is hindered because of their limited availabili...

Journal: :Environmental science & technology 2006
Mary Joyce A Dinglasan-Panlilio Scott A Mabury

Polyfluorinated telomer alcohols and sulfonamides are classes of compounds recently identified as precursor molecules to the perfluorinated acids detected in the environment. Despite the detection and quantification of these volatile compounds in the atmosphere, their sources remain unknown. Both classes of compounds are used in the synthesis of various fluorosurfactants and incorporated in pol...

Journal: :Current opinion in chemical biology 2010
Gjalt W Huisman Jack Liang Anke Krebber

Over the past two years the application of ketoreductases in the commercial synthesis of chiral alcohols has undergone a revolution. Biocatalysts are now often the preferred catalyst for the synthesis of chiral alcohols via ketone reduction and are displacing reagents and chemocatalysts that only recently were considered break-through process solutions themselves. Tailor-made enzymes can now be...

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