143998-61-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 143998-61-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,9,9 and 8 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 143998-61:
(8*1)+(7*4)+(6*3)+(5*9)+(4*9)+(3*8)+(2*6)+(1*1)=172
172 % 10 = 2
So 143998-61-2 is a valid CAS Registry Number.
143998-61-2Relevant articles and documents
VICARIOUS NUCLEOPHILIC SUBSTITUTION OF HYDROGEN IN PYRIDAZINES
Ostrowicz, Andrzej,Baloniak, Sylwester,Makosza, Mieczyslaw,Rykowski, Andrzej
, p. 4787 - 4790 (1992)
Pyridazines, 3-pyridazinones and 3,6-pyridazinediones readily undergo vicarious nucleophilic substitution of hydrogen (VNS) with carbanion of chloromethyl p-tolyl sulfone to form new carbon-carbon bonds.The reaction offers a novel approach to the synthesi
