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138434-88-5

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138434-88-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138434-88-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,4,3 and 4 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 138434-88:
(8*1)+(7*3)+(6*8)+(5*4)+(4*3)+(3*4)+(2*8)+(1*8)=145
145 % 10 = 5
So 138434-88-5 is a valid CAS Registry Number.

138434-88-5Relevant articles and documents

Enzyme-Catalyzed Formation of Chiral Monosubstituted Mixed Diesters and Half Esters of Malonic Acid in Organic Solvents

Gutman, Arie L.,Shapira, Michal,Boltanski, Aviv

, p. 1063 - 1065 (1992)

Enzymes in organic solvents were used to develop a strategy for the formation of heretofore unknown chiral monosubstituted malonate diesters and half esters.This enzymatic approach is not feasible in aqueous solutions because the activated malonic hydrogen invariably undergoes fast exchange accompanied by racemization.

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