1307770-03-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1307770-03-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,0,7,7,7 and 0 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1307770-03:
(9*1)+(8*3)+(7*0)+(6*7)+(5*7)+(4*7)+(3*0)+(2*0)+(1*3)=141
141 % 10 = 1
So 1307770-03-1 is a valid CAS Registry Number.
1307770-03-1Relevant articles and documents
An efficient one-pot synthesis of diarylpyrazolo[1,5-a]pyrimidine from isoflavones
Zhang, Zun-Ting,Ma, Yu-Qing,Liang, Yong,Xue, Dong,He, Qing
, p. 279 - 285 (2011)
Direct synthetic methods of 6,7-diphenylpyrazolo[1,5-a]pyrimidine derivatives have been developed. Cyclocondensation of isoflavones with 3-aminopyrazole in the presence of sodium methoxide as alkali promoter gave 6,7-diphenylpyrazolo[1,5-a]pyrimidines in