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137675-93-5

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137675-93-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137675-93-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,6,7 and 5 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 137675-93:
(8*1)+(7*3)+(6*7)+(5*6)+(4*7)+(3*5)+(2*9)+(1*3)=165
165 % 10 = 5
So 137675-93-5 is a valid CAS Registry Number.

137675-93-5Downstream Products

137675-93-5Relevant articles and documents

SYNTHESIS OF POLYFLUORO-SUBSTITUTED PYRYLIUM SALTS WITH AN ACTIVE CH GROUP FROM POLYFLUOROCHALCONES

Orlova, N. A.,Gerasimova, T. N.,Kudinova, M. A.,Tolmachev, A. I.

, p. 1135 - 1141 (2007/10/02)

It was shown that polyfluoro-substituted diarylpyrylium salts with an active CH group at position 2 of the pyrylium ring can be obtained by the reaction of chalcones p-XC6F4COCH=CHPh (where X = F, MeO) with acetoacetic ester or cyclohexanone in the presence of acids.The isomeric chalcone PhCOCH=CHC6H5 undergoes condensation under analogous conditions with the formation of cyclohexenone derivatives.

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