871506-77-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 871506-77-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,1,5,0 and 6 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 871506-77:
(8*8)+(7*7)+(6*1)+(5*5)+(4*0)+(3*6)+(2*7)+(1*7)=183
183 % 10 = 3
So 871506-77-3 is a valid CAS Registry Number.
871506-77-3Relevant articles and documents
A simple synthesis of 6-phenylpyrano[2,3-c]pyrazol-4(1H)-ones
Becker, Wilfried,Eller, Gernot A.,Holzer, Wolfgang
, p. 2583 - 2589 (2007/10/03)
A novel synthesis of substituted 6-phenylpyrano[2,3-c]pyrazol-4(1H)-ones via reaction of various 2-substituted or 2,5-disubstituted 2,4-dihydro-3H- pyrazol-3-ones with phenylpropynoyl chloride using calcium hydroxide in refluxing 1,4-dioxane is described.
