1428857-25-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1428857-25-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,2,8,8,5 and 7 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1428857-25:
(9*1)+(8*4)+(7*2)+(6*8)+(5*8)+(4*5)+(3*7)+(2*2)+(1*5)=193
193 % 10 = 3
So 1428857-25-3 is a valid CAS Registry Number.
1428857-25-3Relevant articles and documents
Synthesis of pyrazolo[1,5-a]pyridines by thermal intramolecular cyclization
Hoashi, Yasutaka,Takai, Takafumi,Kotani, Etsuo,Koike, Tatsuki
, p. 2199 - 2202 (2013)
Thermal intramolecular cyclization of N-amino-2-alkynylpyridines was developed for facile and versatile synthesis of pyrazolo[1,5-a]pyridines. Simply heating N-amino-2-alkynylpyridines in acetic acid provided pyrazolo[1,5-a] pyridines in excellent yield.
