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CAS No. : | 536-40-3 | MDL No. : | MFCD00007603 |
Formula : | C7H7ClN2O | Boiling Point : | - |
Linear Structure Formula : | H2NNHC(O)C6H4Cl | InChI Key : | PKBGHORNUFQAAW-UHFFFAOYSA-N |
M.W : | 170.60 | Pubchem ID : | 10816 |
Synonyms : |
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Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H315-H319-H335 | 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 |
---|---|---|
95% | In ethanol; at 60℃; for 16h; | Example 8Preparation of 4-chlorobenzoic acid [1-(2-chloro-6-hydroxyphenyl)-methylidene]-hydrazide (Compound 70) A suspension of <strong>[18362-30-6]2-chloro-6-hydroxybenzaldehyde</strong> (0.10 g, 0.64 mmol) and 4-chlorobenzoic acid hydrazide (0.10 g, 0.61 mmol) in EtOH (3 mL) was agitated and heated to 60° C. for 16 h. The reaction mixture was cooled to room temperature and H2O (1-2 mL) was added portionwise to precipitate the product. The solid was collected via suction filtration and rinsed with ethanol to furnish the title compound as an off-white solid (0.18 g, 95percent): mp 273-277° C.; 1H NMR (400 MHz, DMSO-d6) delta 12.53 (s, 1H), 12.51 (s, 1H), 9.04 (s, 1H), 8.03-7.95 (m, 2H), 7.71-7.63 (m, 2H), 7.34 (t, J=8.2 Hz, 1H), 7.07 (dd, J=7.9, 0.9 Hz, 1H), 6.96 (d, J=8.2 Hz, 1H); ESIMS m/z 309 ([M+H]+), 307 ([M-H]-). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
79% | With sulfuric acid; acetic acid; In methanol; water; for 1h;Reflux; | General procedure: Compounds of series I were synthesized by refluxing <strong>[92-55-7]5-nitro-2-furaldehyde diacetate</strong> 98% (5 mmol) and benzhydrazides (3) (5 mmol) in water, sulphuric acid, acetic acid, and methanol (8:7:8:20 v/v) for 1 h. After cooling, the mixture was poured into cold water to precipitate the azomethine derivatives 20(see structural elucidation of the compounds of series I in Supplementary data, p. S2). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
91.3% | With acetic acid; In ethanol; at 70℃; for 5h; | General procedure: The Compound I (0.79 mmol)was dissolved in 10 mL of absolute ethanol. Then the mixture of R2-CHO (0.66 mmol), 10 mL acetic acid and 3 mL absolute ethanol was added dropwise at 70 °C. The mixture was refluxed for 5 h. The solvent was evaporated. The crude product was purified by flash chromatography (neutral Al2O3). 4-[N,N-di(4-tolyl)amino]benzaldehyde 4-chlorobenzoylhydrazone (III-1): yield (91.3percent). Melting point: 114.2-117.6 °C. IR(KBr, cm-1): 3446 (gamma -NH-), 3090, 3027, 2920, 1654, 1598, 1564, 1506, 1273, 817. 1H NMR (CDCl3, 400 MHz, ppm): 7.79(d, 1H, J = 6.8 Hz), 7.71-7.69(q, 1H), 7.55-7.52(q, 2H), 7.49(s, 1H, -N=CH-), 7.43(d, 2H, J = 7.6 Hz), 7.26(s, 1H), 7.10(d, 4H, J 8.0 Hz), 7.01(d, 4H, J = 8.0 Hz), 6.94(d, 2H, J = 8.4 Hz), 2.33(s, 6H, -CH3). 13C NMR (CDCl3, 100 MHz, ppm): 153.8, 144.3, 139.3, 133.8, 130.9, 130.1, 129.1, 128.8, 125.6, 122.2, 120.2, 20.9. HR-ESIMS (m/z, [M + H]+) calcd. for C28H25ON3Cl+ 454.1681, found 454.1679. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
80% | In ethanol; at 80℃; | General procedure: The reaction mixture containing 4-chlorophenyl hydrazide(0.5 mmol) and aryl isothiocyanate (0.5 mmol) in absolute ethanol(10 mL) was refluxed at 80 C for 20-30 min and monitored throughTLC. Precipitates were appeared in the reaction mixture which werefiltered and washed with hot hexane then cold ethanol [37]. Productwas dried in vacuum and collected. All compounds 1-25 were characterizedby spectroscopic techniques such as EI-MS and 1H NMR.Spectral data of all compounds are as follows. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
82% | In ethanol; for 5.0h;Reflux; | General procedure: To a stirred solution of compound 3 (100 mg, 0.30 mmol) in ethanol was added corresponding benzohydrazides (1.0 mmol) and refluxed for 5 h. The reaction medium was poured into water and extracted with ethyl acetate. The organic layer was washed with water followed by brine solution, dried over anhydrous sodium sulphate, filtered and concentrated under reduced pressure, to obtain the pure compounds. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
68% | With sodium cyanoborohydride; acetic acid; In tetrahydrofuran; methanol; for 52h;Reflux; | An appropriate 4-halogenobenzohydrazide (1 mmol) was dissolved in 7 mL of a mixture of THF with MeOH (1:1, v/v), followed by addition of <strong>[2631-77-8]3,5-diiodosalicylaldehyde</strong> (411.3 mg, 1.1 mmol). After a complete dissolution, sodium cyanoborohydride (100 mg; 1.6 mmol) and glacial acetic acid (100 μL) were added. The mixture was heated under reflux for 4 h and then let stir for 48 h at room temperature. After this time, the reaction mixture was diluted with distilled water and let stir for 30 min. Then, the mixture was evaporated to dryness and suspended in a small volume of MeOH. After additional 2 h, the resulted precipitate was filtered off and dried to provide pure product. 4-Chloro-N′-(2-hydroxy-3,5-diiodobenzyl)benzohydrazide 4c. White solid; yield 68%; mp 256.5-259C. IR (ATR): 3227 (N-H), 1656 (CO-NH) cm-1. 1H NMR (500 MHz, THF-d8): δ 11.41 (1H, s, OH), 8.33 (1H, s, CONH), 8.04 (1H, d, J=2.0Hz, H4), 7.91 (2H, d, J=8.1Hz, H2, H6), 7.63 (1H, d, J=2.1Hz, H6), 7.52 (2H, d, J=8.2Hz, H3, H5), 4.12 (1H, s, NH), 2.59 (2H, s, CH2). 13C NMR (126 MHz, THF): δ 162.79, 158.66, 148.33, 148.01, 139.91, 130.14, 129.81, 129.55, 121.12, 87.51, 80.69, 51.93. Anal. Calcd for C14H11ClI2N2O2 (528.51): C 31.82, H 2.10, N 5.30, found: C 31.88, H 2.12, N 5.25. |
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