149620-31-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 149620-31-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,9,6,2 and 0 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 149620-31:
(8*1)+(7*4)+(6*9)+(5*6)+(4*2)+(3*0)+(2*3)+(1*1)=135
135 % 10 = 5
So 149620-31-5 is a valid CAS Registry Number.
149620-31-5Relevant articles and documents
Selective syntheses of substituted 6-alkyl-1,1-dimethyl-1,2,3,4-tetrahydronaphthalenes
Parlow, John J.
, p. 2577 - 2588 (1993)
β-ionone is cyclized to 1,1,6-trimethyl-1,2,3,4-tetrahydronaphthalene in 80-95% yield. Selective derivatization at the 5- and/or 7-positions of 6-alkyl-1,1-dimethyl-1,2,3,4-tetrahydronaphthalenes was achieved by nitration, acylation, and reduction.