2-Methyl propionic acid ethyl ester

Sodium 2-Bromo-2-methyl-propionic acid ethyl ester... 

SYNS ETHYL ISOBUTANOATE ETHYLISOBUTY-RATE POT ETHYL-2-METHYLPROPANOATE ETHYL-2-.METHYLPROPIONATE FEMA No. 2428 ISOBUTYRIC ACID, ETHYL ESTER 2-METHYL-PROPIONIC ACID, ETHYL ESTER... 

Male rats treated with either clofibrate [2-(p-chloro-phenoxy)-2-methyl-propionic acid ethyl ester] or nafenopin [2-methyl-2-(p-l,2,3,4-tetrahydro-l-naph-thyl)phenoxypropionic acid], two peroxisome proliferating compounds with potent hypoHpidemic properties, showed identical structural changes in their lungs (Fringes and Reith 1988). 

The reaction of potassium 3-amino-4-oxo-3,4-dihydroquinazoline-2-thiolate 62 with a-bromophenylacetic acid 63 resulted in the formation of (3-amino-4-oxo-3,4-dihydroquinazolin-2-ylsulfanyl)-phenyl-acetic acid methyl ester 64 which on alkali treatment and subsequent acidification resulted in the synthesis of 2-phenyl- 1-thia-4,4a,9-triaza-anthracene-3,10-dione 65 <1999JCR(S)86>. Similarly, the reaction of potassium 3-amino-5,6-dimethyl-4-oxo-3,4,4a,7a-tetrahydrothieno[2,3- pyrimidine-2-thiolate 66 with a-bromo-ester 67 resulted in the formation of 2-(3-amino-5,6-dimethyl-4-oxo-3,4,4a,7a-tetrahydrothieno[2,3- / pyrimidin-2-ylsulfanyl)-propionic acid ethyl ester 68. Subsequent treatment with alkali followed by acidification resulted in the formation of 2,3,7-trimethyl-3a,9a-dihydro-l,8-dithia-4a,5,9-triazacyclopenta[ ]naphthalene-4,6-dione 69 <2000JHC1161>... 

Propionic acid, ethyl ester. See Ethyl propionate Propionic acid, 2-hydroxy-. See Lactic acid Propionic acid, 2-methyl-. See Isobutyric acid... 

Preparation of (5)-3,3,3-trifluoro-2-hydroxy-2-(5-methyl-3-indolyl)-propionic acid ethyl ester (105, Ri = Me) from 102 (Ri = Me), and 96 via cinchonidine alkaloid catalyst 102 ... 

In a more detailed study, the same esterase P. fluorescens) was again subjected to mutagenesis using the same mutator strain, but also by saturation mutagenesis at selected positions 133a). In addition to 3-phenylbutyric acid ethyl ester (27), 3-bromo-2-methyl-propionic acid methyl ester rac-31) was chosen for the hydrolytic kinetic resolution, with the WT PFE showing an E factor of 12 in favor of the (5)-32. 

C,5H,(1C1FN20 17617-60-6) see Cinolazepam 21-chloro-l I (i-hydroxy-1 fifS-methyl-l 7-propionyloxy-prcgn-4-enc-3,20-dione (C H-pCIOj) see Ulobetasol propionate 8-chloro-6-hydroxyoctanoic acid ethyl ester (CI(1H, C10, 1070-65-1) see Thioctic acid 7-chloro-4-(4-hydroxyphenylamino)quinolinc (C llnCIN O 81099-86-7) see Amodiaquinc... 

METHYL-2-PROPEN-1-OL see IMWOOO 2-METHYLPROPIONALDEHYDE see IJSOOO METHYL PROPIONATE see MOTOOO 2-METHYLPROPIONIC ACID see IJUOOO a-METHYLPROPIONIC ACID see IJUOOO 2-METHYLPROPIONIC ACID, ETHYL ESTER see ET.SOOO... 

Indanones are very useful and versatile intermediates in the synthesis of metallocene catalysts. Scheme 1 has the synthetic scheme originally used for the preparation of 2-alkyl-4-aryl-substituted ansa metallocenes [9-11]. In the first part of this sequence, the biaryl unit is assembled and the missing carbon atoms are introduced as a side chain. The reaction of 2-phenylbenzyl bromide with malonic acid ethyl ester under basic conditions, followed by a decarboxylation, affords the 2-(2-phenylbenzyl)propionic acid. Chlorination and Friedel-Crafts acylation yields the 2-methyl-4-phenylindanone in 93 % yield. From here, only a few standard transformations are required to complete the synthesis, finally yielding the desired metallocene. 

Propanoic acid butyl ester. See n-Bulyl propionate Propanoic acid, ethenyl ester. See Vinyl propionate Propanoic acid ethyl ester. See Ethyl propionate Propanoic acid, 2-hydrorqr-. See Lactic acid Propanoic acid, 2-hydrorqr-, ammonium salt SeeAmmonium lactate Propanoic acid, 2-hydrorqr-, butyl ester. See Butyl lactate Propanoic acid, 2-hydrorqr-, 1-methylethyl ester. See Isopropyl lactate Propanoic acid, 2-methyl-, monoester with 2,2,4-trimethyl-1,3-pentanediol. See2,2,4-Trimethyl-1,3-pentanediol isobutyrate Propanoic acid, pentyl ester. SeeAmyl propionate Propanoic acid, propyl ester. See Propyl propionate Propanoic acid, 3,3 -thiobis-, dioctadecyl ester. See Disteatyl thiodipro-pionate... 

Esters of medium volatility are capable of removing the water formed by distillation. Examples are propyl, butyl, and amyl formates, ethyl, propyl, butyl, and amyl acetates, and the methyl and ethyl esters of propionic, butyric, and valeric acids. In some cases, ternary azeotropic mixtures of alcohol, ester, and water are formed. This group is capable of further subdivision with ethyl acetate, all of the ester is removed as a vapor mixture with alcohol and part of the water, while the balance of the water accumulates in the system. With butyl acetate, on the other hand, all of the water formed is removed overhead with part of the ester and alcohol, and the balance of the ester accumulates as a high boiler in the system. 

Ben2yloxyindolyl-3)-Q -acetvlamino-Q -methylthiopropionic acid methanethiol ester (449 mg) was added to 10 ml of ethanol and further 1 ml of triethylamine was added to the mixture. Then, the reaction mixture was refluxed for 17 hours, after condensation under reduced pressure and subsequent separation of the residue by column chromatography (silica gel, ethyl acetate), 353 mg of methyl -(5-benzyloxyindolyl-3)-Q -acetylamino-Q -methylthio-propionate was obtained as colorless glasslike substance in the yield of 81.5%. Recrystallization of the substance from methanol water afforded 287 mg of crystals. 

The molecular ion can be very small or nonexistent. Esters where R is greater than methyl form a protonated acid that aids in the interpretation (e.g., m/z 47, formates m/z 61, acetates m/z 75. propionates m/z 89, butyrates etc.). Interpreting the mass spectra of ethyl esters may be confusing without accurate mass measurement because the loss of C2H4 can be confused with the loss of CO from a cyclic ketone. 

ETHYL a-(l-PYRROLIDYL)-PROPIONATE (1-Pyrrolidineacetic acid, a-methyl-, ethyl ester)... 

Because of the difficulty encountered in acetylation of the complexed alcohol, it was of interest to see if the ester complex behaves in a normal fashion. Refluxing (HaO) [Cr(AcO-A)2] in methanol or ethanol caused methyl or ethyl acetate to be formed, while refluxing in ethyl propionate formed ethyl acetate. When the potassium salt was used in place of the oxonium salt no transesterification was observed this could be due to the necessity of acid catalysis or a difference in solubility in these essentially heterogeneous systems. The oxonium salt, (H30) [Cr(AcO-A)2], appears to have typical ester reactivity. 

ABA ABS ABS-PC ABS-PVC ACM ACS AES AMMA AN APET APP ASA BR BS CA CAB CAP CN CP CPE CPET CPP CPVC CR CTA DAM DAP DMT ECTFE EEA EMA EMAA EMAC EMPP EnBA EP EPM ESI EVA(C) EVOH FEP HDI HDPE HIPS HMDI IPI LDPE LLDPE MBS Acrylonitrile-butadiene-acrylate Acrylonitrile-butadiene-styrene copolymer Acrylonitrile-butadiene-styrene-polycarbonate alloy Acrylonitrile-butadiene-styrene-poly(vinyl chloride) alloy Acrylic acid ester rubber Acrylonitrile-chlorinated pe-styrene Acrylonitrile-ethylene-propylene-styrene Acrylonitrile-methyl methacrylate Acrylonitrile Amorphous polyethylene terephthalate Atactic polypropylene Acrylic-styrene-acrylonitrile Butadiene rubber Butadiene styrene rubber Cellulose acetate Cellulose acetate-butyrate Cellulose acetate-propionate Cellulose nitrate Cellulose propionate Chlorinated polyethylene Crystalline polyethylene terephthalate Cast polypropylene Chlorinated polyvinyl chloride Chloroprene rubber Cellulose triacetate Diallyl maleate Diallyl phthalate Terephthalic acid, dimethyl ester Ethylene-chlorotrifluoroethylene copolymer Ethylene-ethyl acrylate Ethylene-methyl acrylate Ethylene methacrylic acid Ethylene-methyl acrylate copolymer Elastomer modified polypropylene Ethylene normal butyl acrylate Epoxy resin, also ethylene-propylene Ethylene-propylene rubber Ethylene-styrene copolymers Polyethylene-vinyl acetate Polyethylene-vinyl alcohol copolymers Fluorinated ethylene-propylene copolymers Hexamethylene diisocyanate High-density polyethylene High-impact polystyrene Diisocyanato dicyclohexylmethane Isophorone diisocyanate Low-density polyethylene Linear low-density polyethylene Methacrylate-butadiene-styrene... 

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