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(3R,4R,5R)-3,4-O-isopropylidene-5-cyano-1-(4-methoxybenzyl)-2-pyrrolidinone is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

254441-93-5

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254441-93-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 254441-93-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,4,4,4 and 1 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 254441-93:
(8*2)+(7*5)+(6*4)+(5*4)+(4*4)+(3*1)+(2*9)+(1*3)=135
135 % 10 = 5
So 254441-93-5 is a valid CAS Registry Number.

254441-93-5Upstream product

254441-93-5Relevant academic research and scientific papers

Asymmetric synthesis of 3,4-dihydroxyglutamic acids via enantioselective reduction of cyclic meso-imide

Oba, Makoto,Koguchi, Shinichi,Nishiyama, Kozaburo

, p. 8089 - 8092 (2004)

Stereoselective synthesis of (3S,4S)- and (3R,4R)-series of 3,4-dihydroxyglutamic acids was investigated. The key reaction in this synthesis is asymmetric reduction of meso-imide derived from meso-tartaric acid. Lewis acid-promoted cyanation of the obtained optically active lactam via the acyliminium intermediate followed by standard deprotection procedure afforded the desired 3,4-dihydroxyglutamic acids. Graphical abstract

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