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19759-21-8

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19759-21-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 19759-21-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,7,5 and 9 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 19759-21:
(7*1)+(6*9)+(5*7)+(4*5)+(3*9)+(2*2)+(1*1)=148
148 % 10 = 8
So 19759-21-8 is a valid CAS Registry Number.

19759-21-8Relevant articles and documents

Lipase-catalyzed Irreversible Transesterification of Secondary Alcohols Using Isopropenyl Acetate

Ghanem, Ashraf,Schurig, Volker

, p. 1151 - 1157 (2003)

Asymmetric acetylation of a set of secondary alcohols with the innocuous acyl donor isopropenyl acetate catalyzed by a lipase from Pseudomonas cepacia immobilized on ceramic particles (PSL-C) in toluene as organic medium afforded the chiral alcohols and the corresponding acetates in high enantiomeric excess (up to 99%). An effective baseline separation of the enantiomers of both substrate and product was performed in one analysis without derivatization using gas chromatography on a new chiral stationary phase (CSP) Chirasil-β-Dex containing an undecamethylene spacer (C11-Chirasil-Dex).

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