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1294505-63-7

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1294505-63-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1294505-63-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,9,4,5,0 and 5 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1294505-63:
(9*1)+(8*2)+(7*9)+(6*4)+(5*5)+(4*0)+(3*5)+(2*6)+(1*3)=167
167 % 10 = 7
So 1294505-63-7 is a valid CAS Registry Number.

1294505-63-7Relevant articles and documents

Resolution of carboxylic acids using copper(I)-promoted removal of propargylic esters under neutral conditions

Ghosh, Partha,Aube, Jeffrey

experimental part, p. 4168 - 4172 (2011/07/30)

A method for the optical resolution of carboxylic acids is described. Condensation of racemic carboxylic acids with chiral terminal propargyl alcohols gave separable diastereomeric esters. Chromatographic separation followed by heating the individual diastereomers in methanol with catalytic copper(I) halide regenerated the carboxylic acids in good yields and in enantiomeric ratios of ?94%. This method is particularly useful for the resolution of carboxylic acids that are incompatible with conventional ester hydrolysis.

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