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| | 2-Chloro-4-iodopyridine-3-carboxaldehyde Basic information | | Uses |
| | 2-Chloro-4-iodopyridine-3-carboxaldehyde Chemical Properties |
| Melting point | 87-92 °C | | Boiling point | 326.6±42.0 °C(Predicted) | | density | 2.083±0.06 g/cm3(Predicted) | | storage temp. | Keep in dark place,Sealed in dry,Room Temperature | | form | solid | | pka | -1.53±0.10(Predicted) | | Appearance | Light yellow to yellow Solid | | Sensitive | Air & Light Sensitive | | InChI | InChI=1S/C6H3ClINO/c7-6-4(3-10)5(8)1-2-9-6/h1-3H | | InChIKey | OPZCXONVRBYGHX-UHFFFAOYSA-N | | SMILES | C1(Cl)=NC=CC(I)=C1C=O | | CAS DataBase Reference | 153034-90-3(CAS DataBase Reference) |
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| | 2-Chloro-4-iodopyridine-3-carboxaldehyde Usage And Synthesis |
| Uses | 2-Chloro-4-iodopyridine-3-carboxaldehyde is an organic heterocyclic compound that can be used as a pharmaceutical intermediate. | | Chemical Properties | Yellow-green solid | | Synthesis | Example 1: Synthesis of N-(2-(2,6-dichlorophenyl)-2H-pyrazolo[4,3-c]pyridin-4-yl)cyclopropanecarboxamide
Step 1: Preparation of 2-chloro-4-iodonicotinaldehyde
A solution of 2-chloro-3-iodopyridine (5.0 g, 21 mmol) in anhydrous THF (30 mL) was slowly added dropwise to a solution of lithium diisopropylammonium (15 mL, 30 mmol) in anhydrous THF (50 mL) that was pre-cooled to -78 °C. The reaction mixture was stirred continuously at -78 °C for 3 hours. Subsequently, ethyl formate (4.0 g, 54 mmol) was added to the reaction system and stirring was continued at the same temperature for 1.5 hours. Upon completion of the reaction, the reaction was quenched by the addition of water (10 mL), after which the mixture was slowly warmed to room temperature. THF was removed by distillation under reduced pressure after addition of 2 M HCl (50 mL).The aqueous phase was extracted with ethyl acetate (2 x 50 mL). The organic phases were combined, washed with brine, dried over anhydrous Na2SO4 and concentrated under reduced pressure. The crude product was purified by silica gel column chromatography (eluent: ether/petroleum ether=1:4) to afford the target compound 2-chloro-4-iodonicotinaldehyde as a yellow solid (3.0 g, 54% yield).
NMR (500MHz, CDCl3): δ10.22 (s, 1H), 8.09 (d, J=5.0Hz, 1H), 7.95 (d, J=5.0Hz, 1H). | | References | [1] Synthetic Communications, 1996, vol. 26, # 23, p. 4421 - 4436
[2] Journal of Organic Chemistry, 1993, vol. 58, # 27, p. 7832 - 7838
[3] Journal of Heterocyclic Chemistry, 2001, vol. 38, # 5, p. 1039 - 1044
[4] Patent: WO2012/66061, 2012, A1. Location in patent: Page/Page column 76-77 |
| | 2-Chloro-4-iodopyridine-3-carboxaldehyde Preparation Products And Raw materials |
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