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CAS No. : | 587-88-2 | MDL No. : | MFCD08235152 |
Formula : | C10H11FO2 | Boiling Point : | No data available |
Linear Structure Formula : | FC6H4CH2COOC2H5 | InChI Key : | VMWJHHAOVXQCLE-UHFFFAOYSA-N |
M.W : | 182.19 | Pubchem ID : | 3013910 |
Synonyms : |
|
Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | 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 |
---|---|---|
at 20℃; for 1h; | Synthesis of (4-Fluoro-phenyl) -acetic acid hydrazide; (4-Fluoro-phenyl)-acetyl chloride was readily prepared from thecorresponding acid by refluxing the acid in thionyl chloride for 1 h. However, the acid chloride was too reactive. Addition of hydrazine hydrate to a solution of the acid chloride gave only the dimer. Reverse addition of acid chloride to hydrazine hydrate at 0 C gave the desired hydrazide with some dimer. The acid chloride was then transformed to the corresponding ethyl ester. Reaction of the ethyl ester with 2 equiv. of hydrazine hydrate in refluxing EtOH gave cleanly the (4-Fluoro-phenyl)-acetic acid hydrazide in 76% yield. The results are summarized below. | |
With triethylamine; In dichloromethane; at 0℃; for 2h; | Step A: Preparation of Ethyl 2-(4-fluorophenyl)acetate; [0282] A mixture of 2-(4-fluorophenyl)acetic acid (23.5 g, 152 mmol) in thionyl chloride 56 mL, 762 mmol) was refluxed for 2 hours and then concentrated in vacuo. The residue was diluted with 200 mL DCM, and stirred at O0C. The mixture was treated with EtOH (9.8 mL, 168 mmol) and TEA (26 mL) dropwise. The mixture was then stirred for 2 hours. The mixture was quenched with 20 mL H2O and extracted with DCM (3 x 50 mL). The combined organics were washed with H2O (3 x 50 mL) and brine 20 mL, dried over anhydrous Na2SO4, and concentrated in vacuo to give 24.7 g of a pale yellow oil. |
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