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169613-99-4

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169613-99-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 169613-99-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,9,6,1 and 3 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 169613-99:
(8*1)+(7*6)+(6*9)+(5*6)+(4*1)+(3*3)+(2*9)+(1*9)=174
174 % 10 = 4
So 169613-99-4 is a valid CAS Registry Number.

169613-99-4Relevant articles and documents

A chemoenzymatic route to both enantiomers of betaxolol

Di Bono,Scilimati

, p. 699 - 702 (2007/10/02)

Evaluation of some of the possible lipase-catalyzed transformations has been done in order to prepare both enantiomers of betaxolol. Resolution of betaxolol by lipase-catalyzed hydrolysis of its bisacetylated derivatives 4 led to (-)- and (+)-enantiomers with an ee of 20 and 60%, respectively. When the resolution was performed on the chlorohydrin precursor 6 of betaxolol, (-)- and (+)-enantiomers were obtained with an ee of 91 and 75%, respectively.

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