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Chemical Structure| 166313-49-1 Chemical Structure| 166313-49-1

Structure of 166313-49-1

Chemical Structure| 166313-49-1

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Product Details of [ 166313-49-1 ]

CAS No. :166313-49-1
Formula : C9H13BrN2O2
M.W : 261.12
SMILES Code : BrCC1=C(N(C)N=C1C)C(OCC)=O
English Name :Ethyl 4-(bromomethyl)-1,3-dimethyl-1H-pyrazole-5-carboxylate
MDL No. :MFCD31657920

Safety of [ 166313-49-1 ]

Application In Synthesis of [ 166313-49-1 ]

* 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.

  • Downstream synthetic route of [ 166313-49-1 ]

[ 166313-49-1 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 5744-40-1 ]
  • [ 37348-16-6 ]
  • [ 166313-49-1 ]
YieldReaction ConditionsOperation in experiment
86.3% With paraformaldehyde 3 Synthesis of N-{1,3-dimethyl-4-(α-methyl-3-trifluoromethyl-benzyloxyiminomethyl)pyrazole-5-yl} carbamate (compound No. 194 in Table 1) Example 3 Synthesis of N-{1,3-dimethyl-4-(α-methyl-3-trifluoromethyl-benzyloxyiminomethyl)pyrazole-5-yl} carbamate (compound No. 194 in Table 1) To a mixture of ethyl 1,3-dimethylpyrazole-5-ylcarboxylate (20.0 g) and a 30% hydrogen bromide-acetic acid solution (60 ml), paraformaldehyde (7.2 g) was added and the mixture was stirred at 80 - 90°C for 2 hours and a half. The reaction mixture was poured into ice water and the solution was neutralized with sodium acetate trihydrate (41 g). After extracting with ethyl acetate, the extract was washed in turn with an aqueous saturated sodium bicarbonate solution and brine and then dried over anhydrous sodium sulfate. After the solvent was distilled off, the residue was chromatographed (SiO2: 200 g, hexane/ethyl acetate = 4/1) to give 26.8 g of ethyl 4-bromomethyl-1,3-dimethylpyrazole-5-ylcarboxylate (yield: 86.3%). 1H-NMR (CDCl3); 1.45 (3H, t), 2.28 (3H, s), 4.09 (3H, s), 4.42 (2H, q), 4.65 (2H, s), 13C-NMR (CDCl3); 11.3, 14.1, 23.2, 39.8, 61.4, 120.3, 130.3, 147.1, 159.7
 

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