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(2R)-2-bromo-Butanoic acid methyl ester is a chemical compound with the molecular formula C5H9BrO2. It is a methyl ester derivative of (2R)-2-bromo-butanoic acid, featuring a bromine atom and a carboxylic acid functional group. This colorless liquid with a characteristic odor is known for its ability to undergo nucleophilic substitution, making it useful in a variety of synthetic processes. It is important to handle it with care due to its potential irritant properties.

114438-75-4

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114438-75-4 Usage

Uses

Used in Organic Synthesis:
(2R)-2-bromo-Butanoic acid methyl ester is used as a reagent in organic synthesis for its ability to undergo nucleophilic substitution, which is crucial in various synthetic processes.
Used in Chemical Reactions:
In the chemical industry, (2R)-2-bromo-Butanoic acid methyl ester is used as a reagent to facilitate specific chemical reactions, taking advantage of its unique bromine atom and carboxylic acid functional group.

Check Digit Verification of cas no

The CAS Registry Mumber 114438-75-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,4,4,3 and 8 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 114438-75:
(8*1)+(7*1)+(6*4)+(5*4)+(4*3)+(3*8)+(2*7)+(1*5)=114
114 % 10 = 4
So 114438-75-4 is a valid CAS Registry Number.

114438-75-4Downstream Products

114438-75-4Relevant academic research and scientific papers

GC separation of enantiomers of alkyl esters of 2-bromo substituted carboxylic acids enantiomers on 6-tbdms-2,3-di-alkyl- β- And γ-cyclodextrin stationary phases

Spanik, Ivan,Kaceriakova, Darina,Krupcik, Jan,Armstrong, Daniel Wayne

, p. 279 - 285 (2014/06/09)

The gas chromatographic separation of enantiomers of 2-Br carboxylic acid derivatives was studied on four different 6-TBDMS-2,3-di-O-alkyl- β- and -γ-CD stationary phases. The differences in thermodynamic data {ΔH and -ΔS} for the 15 structurally related

Enoate reductase-mediated preparation of methyl (S)-2-bromobutanoate, a useful key intermediate for the synthesis of chiral active pharmaceutical ingredients

Brenna, Elisabetta,Gatti, Francesco G.,Manfredi, Alessia,Monti, Daniela,Parmeggiani, Fabio

experimental part, p. 262 - 268 (2012/06/18)

Enoate reductases belonging to the Old Yellow Enzyme (OYE) family were employed to develop a biocatalysed approach to methyl (S)-2-bromobutanoate, a key intermediate for the introduction of a particular stereogenic unit into the molecular skeleton of a certain class of chiral drugs. Methyl (Z)-2-bromocrotonate afforded, respectively, (S)-2-bromobutanoic acid (ee = 97%) and methyl (S)-2-bromobutanoate (ee = 97%) by baker's yeast fermentation and by OYE1-3 biotransformations. The bioreductions of other methyl 2-haloalkenoates were also considered. It was observed that the (Z)- and (E)-diastereoisomers of α-bromo unsaturated esters afforded the same enantiomer of the corresponding reduced product.

Enantioselectivity of haloalkane dehalogenases and its modulation by surface loop engineering

Prokop, Zbynek,Sato, Yukari,Brezovsky, Jan,Mozga, Tomas,Chaloupkova, Radka,Koudelakova, Tana,Jerabek, Petr,Stepankova, Veronika,Natsume, Ryo,Van Leeuwen, Jan G. E.,Janssen, Dick B.,Florian, Jan,Nagata, Yuji,Senda, Toshiya,Damborsky, Jiri

supporting information; experimental part, p. 6111 - 6115 (2010/11/05)

In the loop: Engineering of the surface loop in haloalkane dehalogenases affects their enantiodiscrimination behavior. The temperature dependence of the enantioselectivity (lnE versus 1/T) of β-bromoalkanes by haloalkane dehalogenases is reversed (red data points) by deletion of the surface loop; the selectivity switches back when an additional single-point mutation is made. This behavior is not observed for -bromoesters.

Enantioselective synthesis of α-bromo acid derivatives and bromohydrins from tartrate derived bromoacetals

Boyes, Scott A.,Hewson, Alan T.

, p. 2759 - 2765 (2007/10/03)

Bromination of the acetals 4 derived from aryl alkyl ketones, ArCOR, and (2R,3R)-tartaric acid results in bromoacetals 5 with 78-90% de. Hydrolysis of those compounds with Ar = 4-methoxyphenyl or 3-bromo-4-methoxyphenyl results, after recrystallisation, in α-bromoketones 8 with 66-98% ee which are shown to undergo the Baeyer-Villiger oxidation to α-bromoesters 9 with minimal racemisation, α-Bromoketone 8d is shown to undergo carbonyl reduction to threo-bromohydrin 15 with retention of stereochemistry.

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