Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

2-Methylpropionic acid

Hydroxy-2-methylpropionic acid (a-hydroxyisobutyric acid, 2-methyllactic acid)) [594-6I-6J M 104.1, m 79 , b 114 /12mm, 212 /760mm, pK 3.78. Distd in steam, crystd from diethyl ether or benzene, sublimed at 50° and dried under vacuum. [Pg.263]

Chemical Designation - Synonyms Dimethylacetic acid Isopropylformic acid 2-Methylpropanoic acid alpha-Methylpropionic acid Propane-2-carboxylic acid Chemical Formula (CH3)2CHCOOH. Observable Characteristics(asshipped) Liquid Color Colorless Odor Unpleasant, acrid. [Pg.215]

Chamical Name 2-[4-(2, 2 -Dichlorocyclopropyl)phenoxy] -2-methylpropionic acid Common Name —... [Pg.346]

A stream of ethylene oxide is passed through a solution of 107 g of 2-(p-chlorophenoxy)-2-methylpropionic acid and 2 g of zinc chloride in 200 ml of toluene, previously heated to between 55°C and 60°C, until 24 g of the gas have been dissolved. The reaction is allowed to continue for five hours, with gentle stirring. After this time has elapsed, the solution is cooled and washed successively with water, dilute ammonia and water until its pH becomes neutral. It is dried over anhydrous sodium sulfate, the solvent Is separated off under vacuum, and the resulting liquid is the monoglycol ester of 2-(p-chlorophenoxv)-2-methylpropionlc acid. [Pg.608]

Shaw, N.M., Naughton, A., Robins, K., et al. (2002) Selection, purification, characterisation, and cloning of a novel heat-stable stereo-specific amidase from Klebsiella oxytoca, and its application in the synthesis of enantiomerically pure (R)- and (S)-3,3,3-trifluoro-2-hydroxy-2-methylpropionic acids and (S)-3,3,3-trifluoro-2-hydroxy-2-methylpropionamide. Organic Process Research Development, 6, 497-504. [Pg.194]

Monofunctional 2-bromo-2-methylpropionic acid 4-methoxyphenyl ester and difunctional l,4-(2/-bromo-2/-methyl-propionate)benzene initiators, given in Scheme 26, were employed for the polymerization of n-BuMA followed by the addition of DMAEMA, thus leading to the formation of PnBuMA-fo-PDMAEMA block and PDMAEMA-b-PnBuMA-h-PDMAEMA tri-... [Pg.44]

Methylpropenoic acid, m29 2-Methylpropionaldehyde, i79 2-Methylpropionamide, i70 2-Methylpropionic acid, i81 2-Methylpropionic anhydride, i82 2-Methylpropionitrile, i83... [Pg.277]

Allosteric modifiers ofhemoglobin 2-[4-[[(3,5-disubstituted anilino)-carbonyl]methyl]phenoxy]-2-methylpropionic acid derivatives that lower the oxygen affinity ofhemoglobin... [Pg.482]

Captopril Captopril, l-[(2S)-3-mercapto-2-methylpropionyl]-L-proline (22.7.4), is synthesized by direct acylation of L-prohne with 3-acetylthio-2-methylpropionic acid chloride (22.7.2), which is synthesized from 3-acetylthio-2-methylpropionic acid (22.7.1), which is in turn synthesized by reacting methacrylic and thioacetic acid. l-(3-Acetylthio-2-D-methylpropanoyl)-L-proline (22.7.3) is formed by reacting L-proline with 3-acetylthio-2-methylpropionic acid chloride, and it undergoes further ammonolysis with ammonia, to give the desired captopril (22.7.4). [Pg.306]

MbiB 2-Bromo-2-methylpropionic acid methyl ester Initiator... [Pg.188]

Preparative, paper-chromatography is frequently used for further fractionation of the resulting mixtures. The high lability of glycosyl esters of nucleoside pyrophosphates seriously limits the choice of solvent systems. Systems used most commonly are neutral or slighdy acidic mixtures of ethanol with ammonium acetate,24,25 or weakly acidic solvents based on 2-methylpropionic acid.26 A solvent system containing morpholinium borate has also been found extremely useful.27... [Pg.311]

Hydroxy-5-iodobenzoic acid see 5-iodosaIicylic acid. a-Hydroxyisobutyric acid see 2-hydroxy-2-methylpropionic acid. [Pg.238]

Cyclization of some a,a-disubstituted acids has recently been investigated thus, 4,6-dimethoxy-2,2-dimethyl-3(2H)-benzofuranone is obtained in 47% yield from 2-(3,5-dimethoxyphenoxy)-2-methylpropionic acid.277... [Pg.374]

Reaction with OPA and chiral thiol, D-3-mercapto-2-methylpropionic acid... [Pg.78]

ALL Duchateau, H Knuts, JMM Boesten, JJ Guns. Enantioseparation of amino compounds by derivatization with o-phthalaldehyde and D-3-mercapto-2-methylpropionic acid. J Chromatogr 623 237-245, 1992. [Pg.92]

See other pages where 2-Methylpropionic acid is mentioned: [Pg.901]    [Pg.902]    [Pg.905]    [Pg.530]    [Pg.128]    [Pg.608]    [Pg.336]    [Pg.336]    [Pg.336]    [Pg.336]    [Pg.2333]    [Pg.2409]    [Pg.175]    [Pg.175]    [Pg.226]    [Pg.371]    [Pg.1170]    [Pg.1171]    [Pg.1174]    [Pg.570]    [Pg.131]    [Pg.1177]    [Pg.306]    [Pg.55]    [Pg.188]    [Pg.401]    [Pg.280]    [Pg.66]    [Pg.372]    [Pg.238]    [Pg.325]    [Pg.164]   
See also in sourсe #XX -- [ Pg.2 , Pg.176 ]



SEARCH



Methylpropionate

© 2024 chempedia.info