Cas 80870-09-3,dimethyl (2-acryloylphenyl)thiomalonate

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Check Digit Verification of cas no

The CAS Registry Mumber 80870-09-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,8,7 and 0 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 80870-09:
(7*8)+(6*0)+(5*8)+(4*7)+(3*0)+(2*0)+(1*9)=133
133 % 10 = 3
So 80870-09-3 is a valid CAS Registry Number.

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80870-09-3Relevant academic research and scientific papers

Rearrangement of 4-Oxothiochroman-1-io(bismethoxycarbonyl)methanides to Tetrahydro-1-benzothiepin-5-ones

Tamura, Yasumitsu,Takebe, Yasushi,Mukai, Chisato,Ikeda, Masazumi

, p. 2978 - 2981 (1981)

Heating thiochroman-4-ones with dimethyl diazomalonate without solvent or in refluxing toluene in the presence of copper(II) sulphate gave the corresponding bismethoxycarbonylmethanides (4) and dimethyl 5-oxo-2,3,4,5-tetrahydro-1-benzothiepin-2,2-dicarboxylates (5).Treatment of the sulphonium methanides (4) with triethylamine afforded (5).

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