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22661-22-9

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22661-22-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 22661-22-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,6,6 and 1 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 22661-22:
(7*2)+(6*2)+(5*6)+(4*6)+(3*1)+(2*2)+(1*2)=89
89 % 10 = 9
So 22661-22-9 is a valid CAS Registry Number.

22661-22-9Relevant articles and documents

Cycloaddition of acyclic nitrones with phenyl isocyanate: Synthesis and ring-opening reactions of 1,2,4-oxadiazolidin-5-ones

Coskun, Necdet,Parlar, Aydin

, p. 997 - 1004 (2007/10/03)

The cycloaddition of nitrones with unsubstituted or electron-donating substituents on the C-phenyl 1a,c,f with phenyl isocyanate proceeds smoothly for a short time with high yields to give the corresponding 1,2,4-oxadiazolidinone 2, and 1b,d,e with electron-withdrawing substituents gave the corresponding oxadiazolidinone in moderate yields after prolonged heating. Oxadiazolidinones 2a,c,f undergo diethylamine-induced fragmentation for a short time to give the corresponding Schiff bases, and oxadiazolidinones 2b,d,e remain unchanged in these conditions. Prolonged heating of 2d,e in the presence of diethylamine led to complex mixtures. In the case of 2b the corresponding amidine was the main product of the reaction. Copyright Taylor & Francis Group, LLC.

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