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143366-20-5

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143366-20-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 143366-20-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,3,6 and 6 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 143366-20:
(8*1)+(7*4)+(6*3)+(5*3)+(4*6)+(3*6)+(2*2)+(1*0)=115
115 % 10 = 5
So 143366-20-5 is a valid CAS Registry Number.

143366-20-5Downstream Products

143366-20-5Relevant articles and documents

A convenient synthesis of methyl 1-alkoxy-3-perfluoroalkyl-2-naphthoates

Ding,Pu,Zhang

, p. 635 - 637 (2007/10/02)

Methyl 1-alkoxy-3-perfluoroalkyl-2-naphthoates 5 were synthesized by heating appropriately substituted 2-triphenylphosphoranylidene-2-butenoates 3 in xylenes at 250°C in a sealed tube. Compounds 3 were obtained via an intramolecular Wittig reaction of 2-alkoxycarbonylbenzyltriphenylphosphonium bromide (1) with methyl 2-perfluoroalkynoates 2 in the presence of potassium carbonate.

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