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1632289-55-4

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1632289-55-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1632289-55-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,2,2,8 and 9 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1632289-55:
(9*1)+(8*6)+(7*3)+(6*2)+(5*2)+(4*8)+(3*9)+(2*5)+(1*5)=174
174 % 10 = 4
So 1632289-55-4 is a valid CAS Registry Number.

1632289-55-4Relevant articles and documents

An alternate synthesis of bosentan monohydrate, an endothelin receptor antagonist 1

Pradeep, Rebelli,Jayaprakash Rao, Yerrabelly,Kumari Bharathi, Yalamanchili,Subbanarsimulu, Porala,Venkat Reddy, Ghojala,Kondal Reddy, Bairy

, p. 265 - 269 (2014)

An alternate synthesis of an endothelin receptor antagonist bosentan monohydrate is reported. This new synthetic route involves the coupling of p-tert-butyl-N-[6-chloro-5-(2-methoxy-phenoxy)(2,2′-bipyrimidin)-4-yl] benzene sulfonamide with commercially available raw material (2,2-dimethyl-1,3-dioxolan-4-yl)methanol as the key step. Attractive features of this approach are its versatileness, commercial availability of raw materials, usage of eco-friendly reagents, and it efficiently provides the desired bosentan monohydrate free from reported impurities such as dimer, N-alkylated, and pyrimidinone impurities. Georg Thieme Verlag Stuttgart, New York.

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