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133455-80-8

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133455-80-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133455-80-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,4,5 and 5 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 133455-80:
(8*1)+(7*3)+(6*3)+(5*4)+(4*5)+(3*5)+(2*8)+(1*0)=118
118 % 10 = 8
So 133455-80-8 is a valid CAS Registry Number.

133455-80-8Downstream Products

133455-80-8Relevant articles and documents

ELECTROCHEMICAL CYCLIZATION OF TETRAMETHYL ESTERS OF 2-SUBSTITUTED PROPANE-1,1,3,3-TETRACARBOXYLIC ACIDS IN THE PRESENCE OF SALTS OF HYDROHALIC ACIDS

Elinson, M. N.,Fedukovich, S. K.,Nikishin, G. I.

, p. 2523 - 2529 (2007/10/02)

The chemical and electrochemical cyclization of tetramethyl esters of 2-substituted propane-1,1,3,3-tetracarboxylic acids in the presence of hydrohylic acid salt mediators were studied.It was found that the chemical variant of the cyclization of the corresponding α,α'-dianions of esters of propane-1,1,3,3-tetracarboxylic acids by the action of iodine or bromine is substantially inferior to the electrochemical variant.In the latter case, the esters of substituted cyclopropane-1,1,3,3-tetracarboxylic acids are formed in a 87-98percent yield.The tetramethyl ester of 2-isopropylpropane-1,1,3,3-tetracarboxylic acid, which under the electrolysis conditions decomposes according to a Michael retroreaction is an exception.

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