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6859-53-6

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6859-53-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 6859-53-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,8,5 and 9 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 6859-53:
(6*6)+(5*8)+(4*5)+(3*9)+(2*5)+(1*3)=136
136 % 10 = 6
So 6859-53-6 is a valid CAS Registry Number.

6859-53-6Relevant articles and documents

Regioselective ring-opening of epoxides with ortho-lithioanisoles catalyzed by BF3·OEt2

Ertürk, Erkan,Tezeren, Mustafa A.,Atalar, Taner,Tilki, Tahir

experimental part, p. 6463 - 6471 (2012/08/27)

It is presented that a number of o-2-hydroxyalkylanisoles could be efficiently synthesized through the regioselective ring-opening reaction of epoxides with o-lithioanisoles in the presence of BF3·OEt 2 Lewis-acid catalyst. Sterically demanding o-lithioanisoles had to be generated by exploiting the combination of nBuLi and a catalytic amount of TMEDA (0.20 equiv) in Et2O as the lithiator whereas 'normal' anisole could be lithiated at ortho-position by treatment with nBuLi in THF as usual. Surprisingly, the availability of THF and a catalytic amount of TMEDA (0.20 equiv) in the reaction mixture was found to enhance the reaction yields dramatically. A complex aggregate formation by the co-operative ligation of THF and TMEDA to ortho-lithioanisole(s) was proposed to rationalize the high reactivity achieved in the ring-opening reaction of epoxides.

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