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117658-57-8

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117658-57-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 117658-57-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,6,5 and 8 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 117658-57:
(8*1)+(7*1)+(6*7)+(5*6)+(4*5)+(3*8)+(2*5)+(1*7)=148
148 % 10 = 8
So 117658-57-8 is a valid CAS Registry Number.

117658-57-8Downstream Products

117658-57-8Relevant articles and documents

The Thermal ortho-Substitution of Phenols by Vinyl Ethers

Pinhey, John T.,Xuan, Phan Thanh

, p. 69 - 80 (2007/10/02)

Pyrolysis of a mixture of phenol and 3,4-dihydro-2H-pyran (6) at 150-180 deg C resulted in the formation of 2-(tetrahydro-2H-pyran-2-yl)phenol (3a) in moderate yield.This selective ortho-substitution reaction has been investigated for a range of phenols and a number of vinyl ethers.While it was found to be a fairly general reaction for phenols, only with the vinyl ether (6) and 2,3-dihydrofuran (28a) was the reaction found to be regioselective.Aluminium phenylate strongly catalyses the reaction of phenol with (6), which proceeded under these conditions at room temperature.An ene-type mechanism is proposed for the reaction.

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