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CAS No. : | 25597-16-4 | MDL No. : | MFCD00009903 |
Formula : | C6H7F3O2 | Boiling Point : | - |
Linear Structure Formula : | (F3C)HCCHCO2CH2CH3 | InChI Key : | ZKRJCMKLCDWROR-ONEGZZNKSA-N |
M.W : | 168.11 | Pubchem ID : | 5371261 |
Synonyms : |
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Signal Word: | Danger | Class: | 3 |
Precautionary Statements: | P210-P264-P280-P370+P378-P337+P313-P303+P361+P353 | UN#: | 3272 |
Hazard Statements: | H315-H319-H225 | Packing Group: | Ⅲ |
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 |
---|---|---|
68% | With potassium carbonate; triethylamine; In dimethyl sulfoxide; at 90℃; for 18h; | [1051] A mixture of 5-bromo-2-hydroxy-3-methoxybenzaldehyde (1.40 g, 6.51 mmole), K2C03 (1. 80 G, 13.02 mmole), triethylamine (2.63 g, 26.05 mmole), and ethyl 4,4, 4- trifluorocrotonate (4.38 g, 26.05 mmole) in anhydrous DMSO (5.0 mL) was heated to 90 C under a dry N2 atmosphere for 18 hrs. The contents were poured into 2.4 N HCL (50 ml) and extracted with EtOAc (2 X 100 mL). The combined extracts were washed with brine (100 mL), dried over MGS04, filtered and concentrated in vacuo to give a dark yellow oil which was subject to flash chromatography (silica gel) and eluted with 10% EtOAc in hexanes to give a yellow solid (1.6 g, 68%). GCMS 7N/Z 364.0 (M+). H NMR (CDC13/400 MHz) 7.59 (s, 1H), 7.27 (s, 1H), 7.16 (s, 1H), 5.70 (q, 1H, J=7. 0 Hz), 4.29 (m, 2H), 2.19 (s, 3H), 1.32 (m, 3H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
52% | With potassium carbonate; In N,N-dimethyl-formamide; at 65℃; for 4h; | Step 2; Preparation of ethyl 7-iodo-2-(trifluoromethyl)-2H-chromene-3- carboxylate; [0169] To a solution of the aldehyde from Step 1 (25 g, 114 mmole) (5 g, 27 mmole) in DMF (50 mL) was added, potassium carbonate (3.79 g, 27.5mmole) and ethyl 4,4,4- trifluorocrotonate (5.08 g, 30 mmole). The mixture was heated to 65 C for 4 h. The reaction was-cooled to room temperature, poured into H2O (150 mL), and extracted with ethyl acetate (2 X 150 mL). The combined organic phases were washed with aqueous NaHCO3 solution (2 X 50 mL), aqueous 3 N HCl solution (2 X 50 mL), and brine (2 X 50 mL), dried over Na2SO4, filtered, and concentrated in vacuo producing the ethyl ester (15 g, 52%) as an amber oil. This ester was of suitable purity to use without further purification |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
58% | With potassium carbonate; In N,N-dimethyl-formamide; at 65℃; for 4h; | Step 2. Preparation of ethyl 7-iodo-2-ftrifluoromemyl)-2H-chromene-3-carboxylate.; [0186] To a solution of the benzaldehyde from step 1 (5 g, 27 mrnole) in DMF (50 niL) was added, potassium carbonate (3.79 g, 27.5mmole) and ethyl 4,4,4- trifluorocrotonate (5.08 g, 30 mmole). The mixture was heated to 65 C for 4 h. The reaction was cooled to room temperature, poured into H2O (150 mL), and extracted with ethyl acetate (2 X 150 mL). The combined organic phases were washed with aqueous NaHCO3 solution (2 X 50 mL), aqueous 3 N HCl solution (2 X 50 mL), and brine (2 X 50 mL), dried over Na2SO4, filtered, and concentrated in vacuo producing the title compound (58%). This ester was of suitable purity to use without further purification: ESHRMS m/z 361.1040 (M-H, C13H9IF3O3, Calc'd 361.1046). |