647833-33-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 647833-33-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,7,8,3 and 3 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 647833-33:
(8*6)+(7*4)+(6*7)+(5*8)+(4*3)+(3*3)+(2*3)+(1*3)=188
188 % 10 = 8
So 647833-33-8 is a valid CAS Registry Number.
647833-33-8Relevant articles and documents
Efficient Conversion of Carboxylic Acids into N-Acylbenzotriazoles
Katritzky, Alan R.,Zhang, Yuming,Singh, Sandeep K.
, p. 2795 - 2798 (2007/10/03)
An improved one-pot procedure for the preparation of N-acylbenzotriazoles involves mild reaction conditions and allows the preparation of several derivatives not accessible by the previously reported methods.