2,3-Dichloropyridine Pesticide Intermediates Insecticides Chlorantraniliprole
Toxic 
Irritant
| CAS | 2402-77-9 |
| Chemical Name | 2,3-Dichloropyridine，Synonyms3-dichloropydine;2,3-dichloropydine;3-Dichloropyridine;2,3-DICHLOROPYRIDINE;2,3-dichloro-pyridin;Pyridine, 2,3-dichloro-;2,3-Dichloropyridine>2,3-Dichloropyridine,99%;2,3- twochlorine pyridine;2,3-Dichloropyridine ,98% |
| Appearance | White to slightly beige crystalline powder |
| CBNumber | CB4110338 |
| Molecular Formula | C5H3Cl2N |
| Molecular Weight | 147.99 |
| MDL Number | MFCD00006229 |
Properties
| CAS | 2402-77-9 |
| Chemical Name | 2,3-Dichloropyridine，Synonyms3-dichloropydine;2,3-dichloropydine;3-Dichloropyridine;2,3-DICHLOROPYRIDINE;2,3-dichloro-pyridin;Pyridine, 2,3-dichloro-;2,3-Dichloropyridine>2,3-Dichloropyridine,99%;2,3- twochlorine pyridine;2,3-Dichloropyridine ,98% |
| Appearance | White to slightly beige crystalline powder |
| CBNumber | CB4110338 |
| Molecular Formula | C5H3Cl2N |
| Molecular Weight | 147.99 |
| MDL Number | MFCD00006229 |
| MOL File | 2402-77-9.mol |
| Melting point | 64-67 °C (lit.) |
| Boiling point | 242.42°C (rough estimate) |
| Density | 1.5159 (rough estimate) |
| refractive index | 1.5500 (estimate) |
| storage temp. | Inert atmosphere,Room Temperature |
| pka | -0.63±0.10(Predicted) |
| Water Solubility | slightly soluble |
| BRN | 109811 |
Chemical Properties,Uses,Production
1.Chemical Properties
White to slightly beige crystalline powder
2.Uses
It is used as a reagent for the preparation of substituted 3-(5-membered heterocycle-carboxamido)pyridine derivatives for treatment of autoimmune and inflammatory diseases. Also in the synthesis, crystal structure and biological activity of novel anthranilic Diamide insecticide with propargyl ether.
3.Synthesis
It is synthesized from 2-chloronicotinic acid via amidation, Hofmann degradation, diazotization and Sandmeyer reaction.
4.Structure and conformation
The complete mol-ecule of 2,3-Dichloropyridine, C5H3Cl2N, is generated by crystallographic twofold symmetry, which forces the pyridine N atom and the opposite C—H group to be statistically disordered. In the crystal, weak aromatic π–π stacking [centroid–centroid separation = 3.805 (4)Å and slippage = 1.704Å] leads to [100] stacks of mol-ecules. Short Cl···Cl contacts [3.334 (3)Å] are also observed. Colourless prisms were grown from ethanol.
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