135673-74-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 135673-74-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,5,6,7 and 3 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 135673-74:
(8*1)+(7*3)+(6*5)+(5*6)+(4*7)+(3*3)+(2*7)+(1*4)=144
144 % 10 = 4
So 135673-74-4 is a valid CAS Registry Number.
135673-74-4Relevant articles and documents
Homolytic acylation of methyl 3-amino-2-pyrazinecarboxylates
Ried,Russ Th.
, p. 581 - 582 (1991)
Homolytic acylation of methyl 3-amino-2-pyrazinecarboxylates 1 a-c under standard Minisci conditions afford the corresponding 5- or 6-monoacylated pyrazines 3 a-d or 4a,b in reasonable yields. With 1 a, complete selectivity in favor of the 5-acyl products is observed.
