187267-99-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 187267-99-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,7,2,6 and 7 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 187267-99:
(8*1)+(7*8)+(6*7)+(5*2)+(4*6)+(3*7)+(2*9)+(1*9)=188
188 % 10 = 8
So 187267-99-8 is a valid CAS Registry Number.
187267-99-8Relevant articles and documents
Isomerization of 4-aminobenzofurans to 4-hydroxyindoles
Chilin,Rodighiero,Guiotto
, p. 309 - 312 (2007/10/03)
4-Amino-2-methylbenzofurans are quantitatively converted to 4-hydroxy- 2-methylindoles in acidic medium. The rearrangement mechanism involves the ring opening of the furan ring to produce an intermediate carbocation, which undergoes ring clo- sure to the