113297-21-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 113297-21-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,3,2,9 and 7 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 113297-21:
(8*1)+(7*1)+(6*3)+(5*2)+(4*9)+(3*7)+(2*2)+(1*1)=105
105 % 10 = 5
So 113297-21-5 is a valid CAS Registry Number.
113297-21-5Relevant articles and documents
PREPARATION AND DIENOPHILICITY OF 3-METHYL-4,5-BENZOFURANDIONE
Lee, Junning,Tang, Jin,Snyder, John K.
, p. 3427 - 3430 (2007/10/02)
The o-quinone 3-methyl-4,5-benzofurandione, 1, was prepared in 94percent overall yield from p-benzoquinone and 1-morpholino-propene.The cycloaddition chemistry of 1 with several dienes was examined and found to proceed in good to excellent yields.
