421552-88-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 421552-88-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,2,1,5,5 and 2 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 421552-88:
(8*4)+(7*2)+(6*1)+(5*5)+(4*5)+(3*2)+(2*8)+(1*8)=127
127 % 10 = 7
So 421552-88-7 is a valid CAS Registry Number.
InChI:InChI=1/C15H12N2O2/c1-19-15(18)11-6-4-5-10(9-11)14-16-12-7-2-3-8-13(12)17-14/h2-9H,1H3,(H,16,17)
421552-88-7Relevant articles and documents
Liquid-phase synthesis of 2-substituted benzimidazoles, benzoxazoles and benzothiazoles
Chen, Chinpiao,Chen, Yi-Jing
, p. 113 - 115 (2007/10/03)
A novel acid fluoride for use in the liquid-phase synthesis of substituted benzimidazoles, benzoxazoles and benzothiazoles was developed. Its synthetic utility is exemplified by a structurally diverse set of aromatic heterocycles. Final cleavage is achiev