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Chemical Structure| 455-38-9 Chemical Structure| 455-38-9
Chemical Structure| 455-38-9

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Synonyms: meta-Fluorobenzoic acid

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Product Details of 3-Fluorobenzoic acid

CAS No. :455-38-9
Formula : C7H5FO2
M.W : 140.11
SMILES Code : C1=C(C=CC=C1F)C(O)=O
Synonyms :
meta-Fluorobenzoic acid
MDL No. :MFCD00002489
InChI Key :MXNBDFWNYRNIBH-UHFFFAOYSA-N
Pubchem ID :9968

Safety of 3-Fluorobenzoic acid

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H315-H319-H335
Precautionary Statements:P261-P305+P351+P338

Application In Synthesis of 3-Fluorobenzoic acid

* 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.

  • Upstream synthesis route of [ 455-38-9 ]
  • Downstream synthetic route of [ 455-38-9 ]

[ 455-38-9 ] Synthesis Path-Upstream   1~1

  • 1
  • [ 455-38-9 ]
  • [ 6638-79-5 ]
  • [ 226260-01-1 ]
YieldReaction ConditionsOperation in experiment
71% With 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In dichloromethane at 20℃; for 75 h; EXAMPLE 4 3-Fluoro-N-methoxy-N-methylbenzamide To a suspension of 3-fluorobenzoic acid (140 mg, 1 mmol) and N dimethylhydroxylamine hydrochloride (107 mg, 1.1 mmol) in dichloromethane (2.5 mL) was added 1- [3- (dimethylamino) propyl]-3-ethylcarbodiimide hydrochloride (EDC) (211 mg, 1.1 mmol) and the mixture stirred at room temperature for 75 h. The solvents were removed under reduced pressure and the residue chromatographed using ethyl acetate- hexane (4: 6) to separate the pure product (130 mg, 71percent). H-n. m. r. (CDC13) 8 3.36 (s, 3H, N-Me), 3.55 (s, 3H, N-OMe), 7. 1. -7.2 (m, 1H, ArH), 7.3-7. 5 (m, 3H, Ar)
71% With 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In dichloromethane at 25℃; for 75 h; Example 4 3-Fluoro-N-methoxy-N-methylbenzamide To a suspension of 3-fluorobenzoic acid (140 mg, 1 mmol) and AC (7 dimethylhydroxylamine hydrochloride (107 mg, 1.1 mmol) in dichloromethane (2.5 mL) was added 1- [3- (DIMETHYLAMINO) PROPYL]-3-ETHYLCARBODIIMIDE hydrochloride (EDC) (211 mg, 1.1 mmol) and the mixture stirred at room temperature for 75 h. The solvents were removed under reduced pressure and the residue chromatographed using ethyl acetate- hexane (4: 6) to separate the pure product (130 mg, 71percent). APOS;H-N. m. r. (CDCL3) 8 3.36 (s, 3H, N-Me), 3.55 (s, 3H, N-OMe), 7.1.-7. 2 (m, 1H, Ar), 7.3-7. 5 (m, 3H, Ar)
61% With 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In dichloromethane at 0 - 20℃; for 3 h; Inert atmosphere 3-fluoro-N-methoxy-N-methylbenzamide
To a solution of 3-fluorobenzoic acid (30 g, 214.1 mmol) in DCM (300 mL) were added EDC.HCl (45 g, 235 mmol) and N,O-dimethylhydroxylamine.HCl (23 g, 235 mmol) at 0° C. under N2.
The reaction mixture was stirred at rt for 3 h, then diluted with water (1000 mL) and extracted with DCM (3*200 mL).
The organics were washed with brine, dried over Na2SO4, and concentrated to obtain the 3-fluoro-N-methoxy-N-methylbenzamide (24 g, 61percent).
(183.91 [M+H]) 1H NMR: (400 MHz, CDCl3) δ: 3.38 (s, 3H), 3.57 (s, 3H), 7.14-7.19 (m, 1H), 7.37-7.43 (m, 2H), 7.48-7.50 (d, J=7.6, 1H).
References: [1] Patent: WO2005/54199, 2005, A1, . Location in patent: Page/Page column 39-40.
[2] Patent: WO2004/52868, 2004, A1, . Location in patent: Page 29.
[3] Patent: US2014/274933, 2014, A1, . Location in patent: Paragraph 0091; 0092.
 

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