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81104-40-7

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81104-40-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81104-40-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,1,0 and 4 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 81104-40:
(7*8)+(6*1)+(5*1)+(4*0)+(3*4)+(2*4)+(1*0)=87
87 % 10 = 7
So 81104-40-7 is a valid CAS Registry Number.

81104-40-7Relevant articles and documents

Tandem Reduction / Intramolecular Hydroxyalkylation of (3-Hydroxyphenyl)alkanoates: a New Regioselective Approach to 1,8-Dihydroxytetralins

Guanti, Giuseppe,Banfi, Luca,Narisano, Enrica,Riva, Renata,Thea, Sergio

, p. 3919 - 3922 (2007/10/02)

4-(3-hydroxyphenyl)-butanoates 4, on treatment with DIBALH, followed by hydrolytic work-up, undergo a novel completely regioselective intramolecular hydroxyalkylation reaction to give 1,8-dihydroxytetralins.The yield of the reaction depends heavily on the structure of starting material, best results being achieved with 3,3-disubstituted butanoates.

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