1071188-32-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1071188-32-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,7,1,1,8 and 8 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1071188-32:
(9*1)+(8*0)+(7*7)+(6*1)+(5*1)+(4*8)+(3*8)+(2*3)+(1*2)=133
133 % 10 = 3
So 1071188-32-3 is a valid CAS Registry Number.
1071188-32-3Relevant articles and documents
Intramolecular Cycloaddition Reactions of Ketene and Carbonyl Groups. A New Synthesis of Benzofurans
Brady, William T.,Giang, Frank Y.
, p. 2145 - 2147 (1986)
(o-Carbonylphenoxy)acetyl chlorides are dehydrochlorinated to the corresponding (o-carbonylphenoxy)ketenes which undergo a cycloaddition reaction to yield tricyclic β-lactones which spontaneously decarboxylate to benzofurans.
