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869186-47-0

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869186-47-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 869186-47-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,6,9,1,8 and 6 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 869186-47:
(8*8)+(7*6)+(6*9)+(5*1)+(4*8)+(3*6)+(2*4)+(1*7)=230
230 % 10 = 0
So 869186-47-0 is a valid CAS Registry Number.

869186-47-0Upstream product

869186-47-0Relevant articles and documents

And Menlust sodium process for the preparation of intermediates

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Paragraph 0023; 0041-0042, (2017/01/09)

The invention relates to a method suitable for preparing montelukast sodium and intermediate 2-(3(S)-(3-(2-(7-chlorine-2-quinolyl) vinyl) phenyl)-3-hydroxypropyl) phenyl)-2-propoxy) tetrahydropyrane (intermediate 3) of the montelukast sodium in a large scale. According to the method, 7-chloroquinaldine and 3-cyanobenzaldehyde are used as starting raw materials, 2-(3-(3-(2-(7-chlorine-2-quinolyl) vinyl) phenyl)-3-oxopropyl) phenyl)-2-propoxy) tetrahydropyrane (intermediate 2) is obtained by six steps of reaction, then intermediate 3 with ee more than 99% and yield more than 90% is obtained by chiral reduction, and the montelukast sodium with high optical purity and high chemical purity is obtained by the intermediate 3 through four steps of reaction.

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