1257247-28-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1257247-28-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,7,2,4 and 7 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1257247-28:
(9*1)+(8*2)+(7*5)+(6*7)+(5*2)+(4*4)+(3*7)+(2*2)+(1*8)=161
161 % 10 = 1
So 1257247-28-1 is a valid CAS Registry Number.
1257247-28-1Relevant articles and documents
One-pot synthesis of phthalides via regioselective intramolecular cyclization from ortho-alkynylbenzaldehydes
Li, Jim,Chin, Elbert,Lui, Alfred S.,Chen, Lijing
, p. 5937 - 5939 (2010)
A one-pot synthesis of phthalides via an intramolecular 5-exo-dig cyclization of ortho-alkynylbenzaldehydes under mild NaClO2 oxidation conditions is described.
