87581-61-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 87581-61-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,5,8 and 1 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 87581-61:
(7*8)+(6*7)+(5*5)+(4*8)+(3*1)+(2*6)+(1*1)=171
171 % 10 = 1
So 87581-61-1 is a valid CAS Registry Number.
87581-61-1Relevant articles and documents
ALPHA-LITHIATION OF N-ALKYL GROUPS IN PYRAZOLES
Katritzky, Alan R.,Jayaram, Chandra,Vassilatos, Socrates N.
, p. 2023 - 2029 (2007/10/02)
1,3,5-Trimethylpyrazole and 1-ethyl-3,5-dimethylpyrazole undergo lithiation exclusively at the α-position of the N-alkyl group. 1-Benzylpyrazole is metallated under kinetic control at -78 deg C at the CH2 group, but the metallorganic intermediate rearrang
