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73213-61-3

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73213-61-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 73213-61-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,2,1 and 3 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 73213-61:
(7*7)+(6*3)+(5*2)+(4*1)+(3*3)+(2*6)+(1*1)=103
103 % 10 = 3
So 73213-61-3 is a valid CAS Registry Number.

73213-61-3Relevant articles and documents

Photochemical Bromination of Methyl (E)-2-Methylbut-2-enoate with N-Bromosuccinimide: Formation of 4-Bromo-2-methylbut-2-en-4-olide

Ishii, Hisashi,Ishige, Marie,Matsushima, Yoko,Tohojoh, Toshiaki,Ishikawa, Tsutomu,Kawanabe, Eri

, p. 2353 - 2360 (2007/10/02)

Bromination of methyl (E)-2-methylbut-2-enoate (4) with N-bromosuccinimide under irradiation with light was described.The formation of 4-bromo-2-methylbut-2-en-4-olide (8) in fairly good yield together with the desired methyl (E)-4-bromo-2-methylbut-2-enoate (5), methyl (E)-2-(bromomethyl)but-2-enoate (6), and methyl 2,3-dibromo-2-methylbutanoate (7) was clarified.Methyl (E)-4-(p-formylphenoxy)-2-methylbut-2-enoate (16) was smoothly subject to catalytic hydrogenation using Wilkinson complex, while the rate of the hydrogenation of its geometrical isomer (17) was extremely retarded.

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