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22668-89-9

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22668-89-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 22668-89-9 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 8 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 22668-89:
(7*2)+(6*2)+(5*6)+(4*6)+(3*8)+(2*8)+(1*9)=129
129 % 10 = 9
So 22668-89-9 is a valid CAS Registry Number.

22668-89-9Relevant articles and documents

Convenient one-pot syntheses of pyrazoles from imines, a vilsmeier type reagent and hydrazine

Katritzky,Denisenko,Denisenko,Arend

, p. 1309 - 1314 (2000)

A simple one-pot procedure for the regioselective synthesis of pyrazoles from readily available starting materials is described. Vilsmeier type reagent 1 reacts with imines 10 (via the corresponding tautomeric secondary enamines) in tetrahydrofuran to give enaminoimine hydrochlorides 11. Nonsymmetrical imines generally react preferentially with 1 at the sterically less hindered α-position. The enaminoimine hydrochlorides 11 are transformed in situ to the corresponding pyrazoles 12 in moderate to high yields by the addition of hydrazine.

Conformational and structural analysis of exocyclic olefins and ketimines by multinuclear magnetic resonance

Montalvo-Gonzalez, Ruben,Montalvo-Gonzalez, J. Ascencion,Ariza-Castolo, Armando

experimental part, p. 907 - 912 (2009/05/09)

The 1H, 13C, and 15N NMR spectra of 5 exocyclic alkenes and 15 different ketimines obtained from cyclohexanone and derivatives using benzyl bromide and primary amines - are analyzed. Relative stereochemical and preferentia

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