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CAS No. : | 10199-89-0 | MDL No. : | MFCD00005808 |
Formula : | C6H2ClN3O3 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | IGHBXJSNZCFXNK-UHFFFAOYSA-N |
M.W : | 199.55 | Pubchem ID : | 25043 |
Synonyms : |
NBD chloride
|
Chemical Name : | 4-Chloro-7-nitrobenzofurazan |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313 | UN#: | N/A |
Hazard Statements: | H315-H319 | Packing Group: | N/A |
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 |
---|---|---|
90% | With tertiary amine; In acetonitrile; for 16.0h;Reflux; Inert atmosphere; | General procedure: To a solution of 4-chloro-7-nitrobenzofurazan (NBD-Cl, 2; 1 eq.) in acetonitrile (0.1 M) was added the requisite amine (1.1 eq.) followed by triethylamine (2 eq.) The reaction mixture was then stirred at reflux under an inert atmosphere (N2) for 16 h. The solvent was removed in vacuo, then the residue was re-dissolved in EtOAc, washed with 1 M HCl, water, brine, dried (Na2SO4), filtered and concentrated. The crude material was purified over silica gel, eluting with a gradient of EtOAc in Hexanes. |
90% | With triethylamine; In acetonitrile; for 16.0h;Reflux; Inert atmosphere; | General procedure: To a solution of 4-chloro-7-nitrobenzoliirazan (NBD-Cl, 2; 1 eq.) in acetonitrile (0.1 M) was added the requisite amine (1.1 eq.) followed by triethylamine (2 eq.). The reaction mixture was then stirred at reflux under an inert atmosphere (N2) for 16 h. The solyent was remoyed in yacuo, then the residue was re-dissolyed in EtOAc, washed with 1 M HC1, water, brine, dried (Na2 S04), fltered and concentrated. The crude material was purifed oyer silica gel, eluting with a gradient ofEtOAc in Hexanes. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
86% | With triethylamine; In ethanol; at 20℃; | NBD-Cl (0.24 g, 1.2 mmol) was added to a solution of7-mercapto-4-methylcoumarin (0.23 g, 1.2 mmol) and triethylamine (0.36 g, 3.6 mmol) in ethanol(50 mL). The reaction mixture was stirred at room temperature for overnight,and the resulting yellow precipitates were filtered and washed with ethanol. The crude product was dried undervacuum to afford compound 2 (86%yield) as a yellow powder; mp: 298 C. 1H NMR (600 MHz, DMSO-d6) delta 8.50 (d, J = 7.9 Hz, 1H), 7.97 (d, J= 8.2 Hz, 1H), 7.80 (d, J = 1.8 Hz,1H), 7.68 (dd, J = 8.2, 1.8 Hz, 1H),7.19 (d, J = 7.9 Hz, 1H), 6.55 (d, J = 1.3 Hz, 1H), 2.49 (d, J = 1.3 Hz, 3H); 13C NMR (150 MHz,DMSO-d6) delta 159.5, 153.9, 153.1, 149.4, 143.4, 137.7, 134.2, 132.8,131.7, 129.9, 127.7, 126.5, 122.2, 121.6, 116.2, 18.5; HRMS: (EI+); m/z calcdfor C16H9N3O5S [M]+:355.0263,found 355.0263. |