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133216-80-5

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133216-80-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133216-80-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,2,1 and 6 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 133216-80:
(8*1)+(7*3)+(6*3)+(5*2)+(4*1)+(3*6)+(2*8)+(1*0)=95
95 % 10 = 5
So 133216-80-5 is a valid CAS Registry Number.

133216-80-5Downstream Products

133216-80-5Relevant articles and documents

Advanced Synthesis of Dihydrofurans: Effect of Formic Acid on the Mn(III)-Based Oxidation

Matsumoto, Risa,Nishino, Hiroshi

, p. 1807 - 1816 (2015/08/06)

The Mn(III)-based oxidation of a tertiary alkylamine, such as nitrilotris(ethane-2,1-diyl) tris(3-oxobutanoate) (1) with 1,1-diphenylethene (2a), effectively proceeded in an acetic acid-formic acid mixed solvent to give nitrilotris(ethane-2,1-diyl) tris(2-methyl-5,5-diphenyl-4,5-dihydrofuran-3-carboxylate) (3). Other typical Mn(III)-based reactions of various β-diketo esters 4a-e, 2,4-pentanedione (6a), malonic acid (6b), and diethyl malonate (6c) with 1,1-diarylthenes 2a-d were also investigated in a similar acetic acid-formic acid mixed solvent and the reaction rate was accelerated and the product yield increased.

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