81144-17-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81144-17-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,1,4 and 4 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 81144-17:
(7*8)+(6*1)+(5*1)+(4*4)+(3*4)+(2*1)+(1*7)=104
104 % 10 = 4
So 81144-17-4 is a valid CAS Registry Number.
81144-17-4Relevant articles and documents
Reactions with Cyclobutenediones, LIX. - New Syntheses of 3-Alkyl-4-phenylcyclobutene-1,2-diones
Ried, Walter,Vogl, Manfred
, p. 355 - 359 (2007/10/02)
The 3-alkyl-4-phenylcyclobutene-1,2-diones 4a-e have been prepared by degradation of the cyclobutene-1,2-diones 3a-e.The compounds 4a and 4b can also be obtained by hydrolysis of the cycloaddition products 5a and 5b.
