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Chemical Structure| 1365889-96-8 Chemical Structure| 1365889-96-8

Structure of 1365889-96-8

Chemical Structure| 1365889-96-8

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Product Details of [ 1365889-96-8 ]

CAS No. :1365889-96-8
Formula : C12H12BrFN2O
M.W : 299.14
SMILES Code : FC1=NN(C2CCCCO2)C3=C1C=C(Br)C=C3
MDL No. :MFCD28142745

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Application In Synthesis of [ 1365889-96-8 ]

* 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 [ 1365889-96-8 ]

[ 1365889-96-8 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 110-87-2 ]
  • [ 1211537-09-5 ]
  • [ 1365889-96-8 ]
YieldReaction ConditionsOperation in experiment
99% With toluene-4-sulfonic acid; In dichloromethane; at 0 - 20℃; for 1h; Step-2: Synthesis of 5-bromo-3-fluoro-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole Into a 2-L 3-necked round-bottom flask was placed <strong>[1211537-09-5]5-bromo-3-fluoro-1H-indazole</strong> (70 g, 325.55 mmol, 1.00 equiv), DCM (700 mL), and TsOH (5.6 g, 32.52 mmol, 0.10 equiv). This was followed by the drop-wise addition of DHP (82.4 g, 979.55 mmol, 3.01 equiv) while stirring at 0 C. The resulting solution was stirred at 0 C. until completion. The reaction was monitored by LCMS. The resulting mixture was washed with 2*500 mL of H2O, and the organic layer was dried over anhydrous sodium sulfate and concentrated under vacuum. The residue was applied onto a silica gel column with ethyl acetate/petroleum ether (0:100-10:90). The collected fractions were combined and concentrated under vacuum to deliver the title compound in 96.3 g (99%) as yellow oil. 1H NMR (300 MHz, DMSO-d6) delta 8.02 (d, J=1.8 Hz, 1H), 7.78-7.74 (m, 1H), 7.67-7.63 (m, 1H), 5.88-5.71 (m, 1H), 3.95-3.79 (m, 1H), 3.75-3.71 (m, 1H), 2.31-2.13 (m, 1H), 2.11-1.86 (m, 2H), 1.74-1.70 (m, 1H), 1.58-1.50 (m, 2H). LCMS: 299 [M+H]+.
99% With toluene-4-sulfonic acid; In dichloromethane; at 0 - 20℃; for 1h; Into a 2-L 3-necked round-bottom flask was placed <strong>[1211537-09-5]5-bromo-3-fluoro-1H-indazole</strong> (70 g, 325.55 mmol, 1.00 equiv), DCM (700 mL), and TsOH (5.6 g, 32.52 mmol, 0.10 equiv). This was followed by the drop-wise addition of DHP (82.4 g, 979.55mmol, 3.01 equiv) while stirring at 0oC. The resulting solution was stirred at 0oC until completion. The reaction was monitored by LCMS. The resulting mixture was washed with 2x500 mL of H2O, and the organic layer was dried over anhydrous sodium sulfate and concentrated under vacuum. The residue was applied onto a silica gel column with ethyl acetate/petroleum ether (0:100-10:90). The collected fractions were combined and concentrated under vacuum to deliver the title compound in 96.3 g (99%) as yellow oil.1H NMR (300 MHz, DMSO-d6) delta 8.02 (d, J = 1.8 Hz, 1H), 7.78-7.74 (m, 1H), 7.67-7.63 (m, 1H), 5.88-5.71 (m, 1H), 3.95-3.79 (m, 1H), 3.75-3.71 (m, 1H), 2.31-2.13 (m, 1H), 2.11-1.86 (m, 2H), 1.74-1.70 (m, 1H), 1.58-1.50 (m, 2H). LCMS: 299 [M+H]+.
60% With pyridinium p-toluenesulfonate; In dichloromethane; at 20℃; for 12h; 10265] The reaction was carried out according to Scheme1, Step-i to give a crude product, which was purified over230-400 mesh silica column chromatography using 1% ethylacetate in n-hexane to afford the title compound of Ex. 2Step-2 (5 g, 60%) as a brown oil
60% With toluene-4-sulfonic acid; In dichloromethane; at 23℃; for 12h; General procedure: To a stuffed solution of 5-bromo- 1H-indazole (23.5 mmol) in dry dichloromethane (50 mL) at 23C was added dihydro pyran (9.9 g, 118 mmol) followed by addition of pyridinium p-toluene sulfonate (0.6 g, 2.4 mmol). The resulting mixture was stuffed at room 23C temperature for 16 h. Upon completion by TLC, the reaction mixture was quenched with water (50 mL) and extracted with dichloromethane (2 x 100 mL). The combined organic extracts were washed with water, brine, dried over sodium sulphate and concentrated. The crude material was purified by column chromatography over 230-400 mesh silica using 4-5% ethyl acetate in hexane to afford5-bromo-i-(tetrahydro-2H-pyran-2-yl)-1H-indazole (20 mmol, 86%) as a pale yellow oil.
With toluene-4-sulfonic acid; In dichloromethane; at 20℃; for 18h; Step 2: 5-Bromo-3-fluoro-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole A mixture of <strong>[1211537-09-5]5-bromo-3-fluoro-1H-indazole</strong> (6.0 g, 27.9 mmol), PTSA (530.7 mg, 2.79 mmol) and DHP (3.05 g, 36.3 mmol) in dichloromethane (80 mL) was stirred at room temperature for 18 h. The reaction mixture was diluted with dichloromethane (370 mL) and washed with water (230 mL). The organic layer was dried over Na2SO4 and concentrated in vacuo. The residue was purified on a silica gel column using EtOAc in petroleum ether (1:100 to 1:15) to afford the title compound as a yellow solid (6.2 g, yield 74.3%). 1H NMR (DMSO-d6, 400 MHz): delta 7.96 (s, 1H), 7.70 (d, 1H), 7.60 (d, 1H), 5.76 (dd, 1H), 3.84-3.80 (m, 1H), 3.71-3.64 (m, 1H), 2.20-2.15 (m, 1H), 1.97-1.87 (m, 2H), 1.69-1.64 (m, 1H), 1.53-1.47 (m, 2H).
11 g With toluene-4-sulfonic acid; In dichloromethane; at 20℃; for 18h; A mixture of 5 -bromo-3 -fluoro- 1H-indazole (9.5 g, 44.2 mmol), p-toluenesulfonic acid (840 mg, 4.4 mmol), 3,4-dihydro-2H-pyran (4.83 g, 57.5 mmol), and dichloromethane (150 mL) was stirred at rt for 18 h, diluted with dichloromethane (200 mL), and then washed with water (150 mL). The organic layer was dried (Na2SO4), filtered, concentrated, and purified by silica gel chromatography (1: 100-1 :50; ethyl acetate/petroleum ether) to give 11 g of 5-bromo-3-fluoro-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole as a yellow solid. 1H NMR (400 MHz, DMSO-d6): oe 7.96 (s, 1H), 7.70 (d, 1H), 7.60 (d, 1H), 5.76 (dd, 1H), 3.84-3.80 (m, 1H), 3.71-3.64 (m, 1H), 2.20-2.15 (m, 1H), 1.97-1.87 (m, 2H), 1.69-1.64 (m, 1H), 1.53-1.47 (m, 2H).

 

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