Method for continuously preparing dihydrobenzo [j] phenanthridine compound containing trifluoromethyl functional group by using micro-channel reaction device
A technology of trifluoromethyl function and microchannel reaction, which is applied in organic chemistry and other fields, can solve the problems of limited amplification potential and long reaction time, and achieve the effects of facilitating industrial amplification, shortening reaction time, and controlling reaction rate
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Embodiment 1
[0052]
[0053] Microchannel reaction device see figure 1 , weigh R 1 is phenyl, R 1 for hydrogen, R 3 0.2666 g (0.5 mmol, 1.0 equiv) of 1,7 enyne reactant (4-(tert-butyl) phenyl) sulfonyl), weak base 2,6-lutidine 0.107 g (1.0 mmol, 2.0 equiv) and dissolved in 1.25mL of dichloromethane to obtain a homogeneous solution A, weighed trifluoromethyl source Umemoto reagent (2b) 0.340g (1.0mmol, 2.0equiv), photocatalyst fac-Ir (ppy) 3 (pc -1) 0.0198g (3mol%) was dissolved in 1.25mL of dichloromethane to obtain a homogeneous solution B, which was loaded into syringes after complete dissolution. Homogeneous solution A and homogeneous solution B are simultaneously pumped into a reactor with a coil inner diameter of 0.5mm and mixed, the volume is 1mL, the flow rates of homogeneous solution A and homogeneous solution B are both 0.1mL / min, with blue The LED light source (50W, 455nm) was irradiated, and the reaction was carried out at 25° C., and the residence time was 10 minutes. A...
Embodiment 2
[0055]
[0056] The method is the same as in Example 1, except that the source of trifluoromethyl is changed to Yagupo'lskii-Umemoto reagent (2c) 0.404g (1.0mmol, 2.0equiv), and loaded into a syringe after being completely dissolved. Pump homogeneous solution A and homogeneous solution B into a reactor with a coil inner diameter of 0.5mm at the same time, with a volume of 1mL, and the flow rates of both homogeneous solution A and homogeneous solution B are 0.1mL / min. The light source (50W, 455nm) was irradiated, and the reaction was carried out at 25°C, and the residence time was 10min. After the reaction was finished, TLC detection was carried out, and the final product was obtained by column chromatography, 296.08 mg of white solid, with a yield of 98.5%. The characterization data are as follows: 1 H NMR (400MHz, Chloroform-d) δ8.17 (d, J = 8.6Hz, 2H), 7.62 (d, J = 8.6Hz, 2H), 7.55–7.37 (m, 4H), 7.35–7.10 (m, 7H), 6.87–6.72(m, 2H), 3.40(d, J=15.9Hz, 1H), 3.08(d, J=16.0H...
Embodiment 3
[0058] Method is the same as embodiment 2, and difference is that photocatalyst is changed into Ir(ppy) 2 (dtbppy)(PF 6 )( PC-2 ) 0.0138g (3mol%), which were loaded into syringes after being completely dissolved. Pump homogeneous solution A and homogeneous solution B into a reactor with a coil inner diameter of 0.5mm at the same time, with a volume of 1mL, and the flow rates of both homogeneous solution A and homogeneous solution B are 0.1mL / min. The light source (50W, 455nm) was irradiated, and the reaction was carried out at 25°C, and the residence time was 10min. After the reaction was completed, TLC detection was performed, and 289.17 mg of the final product was obtained as a white solid by column chromatography, with a yield of 96.2%. The characterization data are as follows: 1 H NMR (400MHz, Chloroform-d) δ8.17 (d, J = 8.6Hz, 2H), 7.62 (d, J = 8.6Hz, 2H), 7.55–7.37 (m, 4H), 7.35–7.10 (m, 7H), 6.87–6.72(m, 2H), 3.40(d, J=15.9Hz, 1H), 3.08(d, J=16.0Hz, 1H), 2.69–2.40(...
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