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Methylacetate

C6H,20. Colourless liquid with a camphorlike odour b.p. l03-J06 C/746mm. Prepared by heating pinacol hydrate with sulphuric acid and distilling the mixture. It is oxidized to tri-methylacetic acid. [Pg.314]

Chemical Designations - Synonyms Methylacetic anhydride Propanoic anhydride Propionyl oxide Chemical Formula (CH3CH2CO)jO. [Pg.331]

Incorporation of the 2-aryl-2-methylacetic acid moiety characteristic of NSAID s as part of... [Pg.157]

A mixture of 10.3 g of thiophene-20 -methylacetic acid [prepared by process of Bercot-Vat-teroni, et al.. Bull. Soc. Chim. (1961) pp. 1820-211, 11.10 g of benzoyl chloride and a suspension of 23.73 g of aluminum chloride in 110 cc of chloroform was allowed to stand for 15 minutes and was then poured into a mixture of ice and hydrochloric acid. The chloroform phase was extracted with a 10% aqueous potassium carbonate solution and the aqueous alkaline phase was acidified with N hydrochloric acid and was then extracted with ether. The ether was evaporated off and the residue was crystallized from carbon tetrachloride to obtain a 54% yield of 5-benzoyl-thiophene-20 -methylacetic acid melting at 83°C to 85°C. The... [Pg.1478]

Tricarballyuc Acid, 4, 77 Tr [methylacetic acid, 8,104,108 TrIMETIIYLAMINE, 1, 75 Trimethyl amine Hydrochloride, 1, IS, 79... [Pg.140]

Recently, Suzuki and Taniguchi93 hydrolyzed n-butylacetate, ethylacetate, and methylacetate with HPSt and 41 (PVA B) (partially-o-benzalsulfonated polyvinylalcohol). The volume of activation, A P+, was obtained from the pressure dependence of reaction rates [ F + = -kT(d Ink/dP)]. The A + increased with increasing hydro-phobidty of the substrate. [Pg.157]

Catalytic asymmetric hydrogenation is a relatively developed process compared to other asymmetric processes practised today. Efforts in this direction have already been made. The first report in this respect is the use of Pd on natural silk for hydrogenating oximes and oxazolones with optical yields of about 36%. Izumi and Sachtler have shown that a Ni catalyst modified with (i ,.R)-tartaric acid can be used for the hydrogenation of methylacetoacetate to methyl-3-hydroxybutyrate. The group of Orito in Japan (1979) and Blaser and co-workers at Ciba-Geigy (1988) have reported the use of a cinchona alkaloid modified Pt/AlaO.i catalyst for the enantioselective hydrogenation of a-keto-esters such as methylpyruvate and ethylpyruvate to optically active (/f)-methylacetate and (7 )-ethylacetate. [Pg.175]

An excellent example of PLC applications in the indirect coupling version is provided by the works of Miwa et al. [12]. These researchers separated eight phospholipid standards and platelet phospholipids from the other lipids on a silica gel plate. The mobile phase was composed of methylacetate-propanol-chloro-form-methanol-0.2% (w/v) potassium chloride (25 30 20 10 10, v/v). After detection with iodine vapor (Figure 9.2), each phospholipid class was scraped off and extracted with 5 ml of methanol. The solvent was removed under a stream of nitrogen, and the fatty acids of each phospholipid class were analyzed (as their hydrazides) by HPLC. The aim of this study was to establish a standardized... [Pg.203]

The complexation of other mixed oxa aza macrocycles has been studied, and protonation and stability constants of the zinc complexes of macrocycles l,4,10,13-tetraoxa-7,16-diazacycloocta-decane-7,16-bis(malonate), the -7-malonate derivative and -7,16-bis(methylacetate) derivative have been determined by potentiometry at a 1 1 ligand-to-metal ratio.730... [Pg.1211]

Propionic acid (Methylacetic acid) CH3CH2COOH 54 512 0.99 2.56 141 Colourless liquid with slightly pungent and rancid odour... [Pg.66]

Warshel, Levitt, and Lifson derived a partially optimised consistent force field for amides and lactams (25). It is composed of an alkane part and an amide-part. The former was taken over from analogous earlier calculations for saturated hydrocarbons (17). The potential constants of the amide-part were optimised with the help of a large number of experimental frequencies (taken from TV-methylform amide, acetamide, iV-methylacetamide, and several deuterated species) as well as experimental geometry data for 7V-methylacet-amide. The resulting force field was used for the calculation of vibrational and conformational properties of 2-pyrrolidone, 2-piperidone and e-caprolactam. [Pg.199]

The micellization behavior of copolymers containing two hydrophobic blocks, or double-hydrophobic block copolymers, has been shown to be mainly controlled by the solvent and its interaction with the copolymer blocks. It is thus possible to tune the micellization of these copolymers by changing the organic solvent. In this respect, large differences in Z, i h, Rc, etc. are expected whenever the interaction parameter between the polymer and the solvent is varied. This is illustrated by, e.g., the work of Pit-sikalis et al. [87] for PS-PSMA diblock copolymers dissolved in either ethyl-or methylacetate. The effect of temperature has been studied by Quintana et al. [88,89], who have clearly shown that CMC decreases with increasing temperature for PS-PEB copolymers in alkanes. [Pg.97]

EHM has also been applied for the calculations of optimum coordination numbers 226> in hydrated alkali ions (Table 20). The affinities of alkali ions to NN -dimethylacetamide and methylacetate were estimated by Kostetsky et al. 227>, using the CNDO/2 procedure (Table 21). As long as the ions are constrained to lie in the peptide- or ester planes, correct trends are obtained, but relaxation of this constraint reveals serious discrepancies to ab initio calculations. The CNDO procedure artificially stabilizes structures with nonpolar bonding geometries,... [Pg.83]

Eine weitcre Moglichkeit ist von Hunter und Ludwig (51) so vie Ltid-wig und Byrne (70) ausgearbeitet worden. Imidoester, z.B. Methylacet-imidat, reagieren mit Aminogruppen unter Bildung von Acetamidino-Derivaten ... [Pg.15]

As mentioned in Sections 3.1.6 and 4.1.3, cyclopropenes can also be suitable starting materials for the generation of carbene complexes. Cyclopropenone di-methylacetal [678] and 3-alkyl- or 3-aryl-disubstituted cyclopropenes [679] have been shown to react, upon catalysis by Ni(COD)2, with acceptor-substituted olefins to yield the products of formal, non-concerted vinylcarbene [2-1-1] cycloaddition (Table 3.6). It has been proposed that nucleophilic nickel carbene complexes are formed as intermediates. Similarly, bicyclo[1.1.0]butane also reacts with Ni(COD)2 to yield a nucleophilic homoallylcarbene nickel complex [680]. This intermediate is capable of cyclopropanating electron-poor alkenes (Table 3.6). [Pg.119]

D-Glucosone (Methanolysis) Main products isolated were the 1,1- di-methylacetal and the methyl p-furanoside formed by its keto group No kinetic results or full analyses available 22)... [Pg.38]

Synonyms Methylacetic acid ethylformic acid ethanecarboxylic acid propanoic acid... [Pg.601]


See other pages where Methylacetate is mentioned: [Pg.862]    [Pg.135]    [Pg.156]    [Pg.1478]    [Pg.22]    [Pg.22]    [Pg.156]    [Pg.112]    [Pg.954]    [Pg.2290]    [Pg.59]    [Pg.164]    [Pg.438]    [Pg.276]    [Pg.1131]    [Pg.109]    [Pg.124]    [Pg.97]    [Pg.69]    [Pg.74]    [Pg.253]    [Pg.346]    [Pg.361]    [Pg.396]    [Pg.504]    [Pg.673]    [Pg.238]    [Pg.311]   
See also in sourсe #XX -- [ Pg.119 , Pg.121 , Pg.210 , Pg.228 ]

See also in sourсe #XX -- [ Pg.119 , Pg.121 , Pg.210 , Pg.228 ]

See also in sourсe #XX -- [ Pg.57 , Pg.79 , Pg.81 ]

See also in sourсe #XX -- [ Pg.27 ]




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Methylacetate carbonylation

Methylacetate, solvent

Methylacetic acid

Methylacetic anhydride

Solvent extraction with methylacetate

Thiophene-2a-methylacetic acid

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