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CAS No. : | 97966-01-3 | MDL No. : | MFCD09835220 |
Formula : | C5H2Cl2IN | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | XSHFSZAXOOQKQS-UHFFFAOYSA-N |
M.W : | 273.89 | Pubchem ID : | 21892874 |
Synonyms : |
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Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P280-P301+P312-P302+P352-P305+P351+P338 | UN#: | |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
75% | With pyridine; Ki; In 1,2-dimethoxyethane; acetonitrile; pentane; | 8a. 2,3-Dichloro-5-iodopyridine <strong>[98121-41-6]5-Amino-2,3-dichloropyridine</strong> (15.0 g, 92.0 mmol, prepared according to V. Koch and S. Schnatterer, Synthesis, 1990, 499-501) was dissolved in DME (30 mL) and subjected to diazotization conditions according to the procedure of M. P. Doyle and W. J. Bryker (Journal Of Organic Chemistry, 1979, 44, 1572). The dissolved pyridine analog was added to a solution of BF3 etherate complex (17 mL, 138 mmol) at -15 C. t-Butyl nitrite in DME (92 mL) was then added at a rate such that the temperature never rose above -5 C. Alter complete addition, the reaction mixture was allowed to warm to 5 C. and stir an additional 45 minutes. Pentane was added and the resultant slurry filtered. The filter cake was washed with cold Et2 O, and the solid was air dried to afford a light orange solid (22.3 g). A sample of the crude diazonium tetrafluoroborate salt (5.1 g, 19.5 mmol) and KI (3.5 g, 21.4 mmol) were combined in CH3 CN (130 mL) and allowed to stir at ambient temperature for 18 hours. A 10% solution of Na2 S2 O3 was carefully added, the biphasic mixture was poured over Et2 O, and the phases were separated. The organic phase was dried (MgSO4) and concentrated, and the residue was chromatographed (silica gel; hexanes/CH2 Cl2, 10:1) to afford a white solid (4.0 g, 75%). mp 55-57 C. Rf =0.43 (hexanes/CH2 Cl2, 2:1). 1 H NMR (CDCl3, 300 MHz) delta8.09 (d, J=1.8 Hz, 1H), 8.5 (d, J=1.8 Hz, 1H). |
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