626-21-1 Usage
Physical Properties
Appearance: Colorless to pale yellow liquid
Odor: Pungent
Primary Uses
Intermediate in the manufacture of agricultural and pharmaceutical products
Derivative
Derivative of pyridine
Synthetic Applications
Building block in the synthesis of various organic compounds
Catalyst in organic reactions
Commercial Importance
Limited commercial uses on its own but plays a significant role in the production of other chemical products
Safety Considerations
Should be handled with caution
Harmful if it comes into contact with skin, eyes, or if inhaled or ingested.
Check Digit Verification of cas no
The CAS Registry Mumber 626-21-1 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,2 and 6 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 626-21:
(5*6)+(4*2)+(3*6)+(2*2)+(1*1)=61
61 % 10 = 1
So 626-21-1 is a valid CAS Registry Number.
626-21-1Relevant articles and documents
Electron and Hydrogen Transfer Reductions of Some 2,4-Disubstituted Pyridines
Attia, A.,El-Salam, O. I. Abd,Youssef, T. E.
, p. 351 - 362 (2007/10/03)
New synthesis of 2,4-diacetylpyridine 1 was undertaken by Claisen condensation of 2,4-diethoxycarbonylpyridine 2a with ethyl acetate, followed by hydrolysis of the intermediate 3. Reduction of 1 with zinc or its salt in hydrochloric, formic or acetic acids afforded mixtures of the ketocarbinol 4 dicarbinol 5 or diethyl 6 pyridine derivatives. Formation of 6 as the complete reduction product was chemically proved to proceed via 4 and 5. Electrochemical reduction of 2a leads to 2,4-dimethylpyridine 7, and that of 1 gave rise to a mixture of 5 and 6 along with 2,4-diethyl-1,2,5,6-tetrahydropyridine 8 and 2,4-diethylpiperidine 9. Finally, metal hydride reduction of 1 gave 5, and that of diesters 2 or diacid chloride 10 derivatives afforded 2,4-dihydroxymethylpyridine 11.
