139225-74-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139225-74-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,2,2 and 5 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 139225-74:
(8*1)+(7*3)+(6*9)+(5*2)+(4*2)+(3*5)+(2*7)+(1*4)=134
134 % 10 = 4
So 139225-74-4 is a valid CAS Registry Number.
139225-74-4Relevant articles and documents
(Benzotriazol-1-yl)methoxymethyl anion: A novel methylal anion equivalent
Katritzky,Yang,Cundy
, p. 3061 - 3071 (1993)
The title anion readily reacts with a variety of electrophiles to give adducts which, upon treatment with methanol in the presence of p-toluenesulfonic acid, afford the corresponding α-functionalized dimethyl acetals.