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109559-41-3

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109559-41-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 109559-41-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,5,5 and 9 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 109559-41:
(8*1)+(7*0)+(6*9)+(5*5)+(4*5)+(3*9)+(2*4)+(1*1)=143
143 % 10 = 3
So 109559-41-3 is a valid CAS Registry Number.

109559-41-3Relevant articles and documents

Alkylation of methylenedimalonic and acetonedicarboxylic esters by dihalogenoalkanes in the presence of potassium carbonate in dimethyl sulfoxide

Zefirov, N. S.,Sadovaya, N. K.,Kombarova, S. V.

, p. 101 - 104 (2007/10/02)

The alkylation of methylenedimalonic ester with methylene bromide, dibromoethane, and 1,3-dibromopropane in the presence of potassium carbonate in DMSO is a convenient method for the synthesis of 1,1,3,3-tetraethoxycarbonylcycloalkanes.The alkylation of acetonedicarboxylic ester leads to the products from either C,C- or C,O-alkylation, depending on the halide and on the reaction conditions.

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