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137234-99-2

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137234-99-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137234-99-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,2,3 and 4 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 137234-99:
(8*1)+(7*3)+(6*7)+(5*2)+(4*3)+(3*4)+(2*9)+(1*9)=132
132 % 10 = 2
So 137234-99-2 is a valid CAS Registry Number.

137234-99-2Relevant articles and documents

3-Ethenyl, 3-Ethynyl, 3-Aryl, and 3-Cyclopropyl-2,4,5-Trifluorobenzoic Acids: Useful Intermediates In The Synthesis Of Quinolone Antibacterials

Turner, William R.,Suto, Mark J.

, p. 281 - 284 (2007/10/02)

The synthesis of 3-ethenyl, 3-ethynyl, 3-aryl, and 3-cyclopropyl-2,4,5-trifluorobenzoic acids from 1-bromo-2,4,5-trifluorobenzene and 2,4,5-trifluoro-3-hydroxybenzoic acid is described.These compounds are useful intermediates for the synthesis of quinolon

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