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103981-42-6

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103981-42-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 103981-42-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,3,9,8 and 1 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 103981-42:
(8*1)+(7*0)+(6*3)+(5*9)+(4*8)+(3*1)+(2*4)+(1*2)=116
116 % 10 = 6
So 103981-42-6 is a valid CAS Registry Number.

103981-42-6Downstream Products

103981-42-6Relevant articles and documents

Preparation of 2,3-Dimethylene-2,3-dihydrobenzofuran by the Flash Vacuum Pyrolysis of (2-Methyl-3-benzofuryl)methyl Benzoate

Chou, Chin-Hsing,Trahanovsky, Walter S.

, p. 4208 - 4212 (1986)

Pyrolysis of (2-methyl-3-benzofuryl)methyl benzoate (7) gives a 30percent yield of two dimers of 2,3-dimethylene-2,3-dihydrobenzofuran (4), a dimer 12 and a dimer (13), in a ratio of 4.1 to 1.It is shown, by low-temperature 1H-NMR spectroscopy, that the primary pyrolysis product from 7 is 4, which forms 12 and 13 upon warming.The structure of the dimer 12 is confirmed by a deuterium-labeling experiment.Compound 4 can be trapped with methyl acrylate to form a 3.0 to 1 ratio of two Diels-Alder adducts.

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