57018-52-7Relevant academic research and scientific papers
METHOD FOR PRODUCING 1-ALKOXY-2-ALKANOL COMPOUND
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Paragraph 0028, (2017/03/24)
PROBLEM TO BE SOLVED: To provide a method for producing 1-alkoxy-2-alkanol compounds from 1,2-alkanediol compounds with good yields while suppressing the by-production of 1,2-dialkoxyalkane compounds. SOLUTION: The present invention provides a method for producing 1-alkoxy-2-alkanol compounds represented by formula (3) by making the reaction between 1,2-alkanediol compounds and tertiary alcohol compounds represented by formula (2) to occur in the presence of acidic catalysts (R1-R4 are each a C1-4 alkyl group). SELECTED DRAWING: None COPYRIGHT: (C)2016,JPOandINPIT
Epoxide hydrolysis and alcoholysis reactions over crystalline Mo-V-O oxide
Zhang, Xiaochen,Wang, Min,Zhang, Chaofeng,Lu, Jianmin,Wang, Yehong,Wang, Feng
, p. 70842 - 70847 (2016/08/05)
Crystalline Mo-V-O oxides have been used as a catalyst for the hydrolysis and alcoholysis of propylene oxide to diols and ethers, respectively. Relationships between the active crystal facet, the acidity of Mo-V-O catalysts and the activity have been established. Our results indicate that the a-b plane is the active facet for the hydrolysis reaction.
Palladium-catalyzed asymmetric quaternary stereocenter formation
Gottumukkala, Aditya L.,Matcha, Kiran,Lutz, Martin,De Vries, Johannes G.,Minnaard, Adriaan J.
supporting information; experimental part, p. 6907 - 6914 (2012/07/01)
An efficient palladium catalyst is presented for the formation of benzylic quaternary stereocenters by conjugate addition of arylboronic acids to a variety of β,β-disubstituted carbocyclic, heterocyclic, and acyclic enones. The catalyst is readily prepared from PdCl2, PhBOX, and AgSbF 6, and provides products in up to 99 % enantiomeric excess, with good yields. Based on this strategy, (-)-α-cuparenone has been prepared in only two steps. Copyright
PROCESS FOR PREPARING AN ALKOXYLATED ALCOHOL OR PHENOL
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Page/Page column 19, (2008/06/13)
Process for preparing an alkoxylated alcohol comprising reacting a starting monohydroxy alcohol selected from secondary alcohols, tertiary alcohols and mixtures thereof with an alkylene oxide in the presence of hydrogen fluoride and a boron-containing compound comprising at least one B-O bond. The alcohol may also be a primary monohydroxy alcohol when the boron containing compound is boric acid or boric acid anhydride or a mixture thereof, or may be a primary mono hydroxy alcohol, except a C14/C15 alcohol when reacted with ethylene oxide in the presence of HF and trimethyl borate. A phenol may be alkoxylated in the same way instead of the mono-hydroxyalcohol.
Synthesis of low molecular weight ethylene propylene glycol ethers via olefin addition to the corresponding glycol
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, (2008/06/13)
A selective process for the synthesis of ethers of polyols involves reacting an olefin and a polyol in the presence of a heteropoly acid catalyst at a temperature of 25 to 200oC and a pressure of up to 7MPa.
Influence of the reaction temperature on some acid-catalized processes of 6-hydroxy-4-oxa-alkanal derivatives and related products. Ring contraction in 5-alkoxy-1,4-dioxepanes
Espinosa, Antonio,Gallo, A. Miguel,Campos, Joaquin,Entrena, Antonio
, p. 379 - 383 (2007/10/02)
The qualitative effect of the reaction temperature on some acid-catalized processes carried out on 6-hydroxy-4-oxa-alkanal derivatives may be rationalized by means of two simultaneous or competitive pathways which involve intermediates such as 5-alkoxy-1,4-dioxepane derivatives or vinyl dioxolanes.We describe herein an acid catalyzed contraction of the 5-isopropoxy-1,4-dioxepane ring in dioxane and different alcohol interchange reactions with 5-alkoxy-1,4-dioxepanes that also occur with ring contraction when the reaction temperature is 60 deg C or higher.The transacetalization reactions between 6-hydroxy-4-oxa-hexal ethylene acetal and 6-hydroxy-4-oxa-heptanal 1,2-propylene acetal and tert-butanol, carried out at the reflux of the reacting mixtures are also described.The results obtained suggest 2-vinyl-1,3-dioxolanes as reactive intermediates.In order to prove this hypothesis the reaction between 2-vinyl-1,3-dioxolane and tert-butanol at reflux has been stuied.It leads to the same reaction products.
13C-N.M.R.-SPECTRAL AND RELATED STUDIES ON THE DISTRIBUTION OF SUBSTITUENTS IN O-(2-HYDROXYPROPYL)CELLULOSE
Lee, Dae-Sil,Perlin, Arthur S.
, p. 1 - 20 (2007/10/02)
Information about the degree of substitution at individual oxygen atoms of O-(2-hydroxypropyl)cellulose, and the total molar substitution, was obtained from 13C-n.m.r. spectra of the intact polymer and of its hydrolyzate.On the basis of their 13-CH3 chemical-shifts, O-(2-hydroxypropyl) (HOPr) substituents occurring singly, or as terminal units of substituent chains, were radily distinguished from inner HOPr units of chains.Differentiation between monomeric HOPr units and longer chains located at O-2 of D-glucosyl residues was effected by the transformation of appropriatly substituted sugars in the hydrolyzate into 1,2-cyclic acetals incorporating a 2-O-(2-hydroxypropyl) group.Similarly, the pattern of substitution at O-6 of D-glucosyl residues was determined, through selective degradation, from the identity of HOPr derivatives of ethylene glycol, representing C-5 and C-6 of the residues.Overall, it was found that, although O-2 and O-6 are more readily substituted than O-3, the rate at which each, initially introduced, HOPr substituent is converted into a dimeric structure is not materially affected by its location.Also described are the synthesis and the n.m.r. spectra of several HOPr derivatives of D-glucose, and of simple alkanols that served as model compounds.
