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949155-92-4

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949155-92-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 949155-92-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,4,9,1,5 and 5 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 949155-92:
(8*9)+(7*4)+(6*9)+(5*1)+(4*5)+(3*5)+(2*9)+(1*2)=214
214 % 10 = 4
So 949155-92-4 is a valid CAS Registry Number.

949155-92-4Relevant articles and documents

Practical synthesis of methyl (E)-2-(3-(3-(2-(7-chloro-2-quinolinyl) ethenyl)phenyl)-3-oxopropyl)benzoate, a key intermediate of Montelukast

He, Liang,Guo, Yang Hui,Wang, Ya Ping,Wang, Xiang Jing,Zhang, Ji,Xiang, Wen Sheng

, p. 518 - 520 (2012/06/16)

A novel and practical synthetic route is presented for the preparation of methyl-(E)-2-(3-(3-(2-(7-chloro-2-quinolinyl)ethenyl)phenyl)-3-oxopropyl) benzoate, the key intermediate of Montelukast, a leukotriene antagonist. The main diarylpropane framework was prepared via a polarity conversation reaction resulting in an acyl anion equivalent followed by a nucleophilic substitution reaction. The overall yield of this approach was 61%. This method is simple for operation and suitable for industrial production.

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