(1Z, 4Z, 5Z) - 6 N alkyl - 6 - aza -2 - oxo - 3 - oxa - 4 - methoxy - dicyclo [3, 1, 0] hexane and preparation method and use thereof
A technology of -6-N- and aziridine, which is applied in the direction of organic chemistry, drug combination, antitumor drugs, etc., can solve the problems of low yield and no anticancer activity, so as to reduce costs, increase yield, The effect of simplifying the test operation
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Embodiment 1
[0037] The synthesis of embodiment 1, hydroxybutene lactone (compound 2)
[0038] Dissolve 236g (2.46mol) of freshly steamed furfural (compound 1) in 2300mL of 95% ethanol, add 2g of rose bengal (Rose Bengal) as a photosensitizer, pass in oxygen, irradiate with a 1000W iodine tungsten lamp, and keep the temperature at 23-27 ℃, magnetic stirring, TLC (thin-layer chromatography) tracking reaction, the reaction takes about 40h; after the reaction is stopped, the ethanol is evaporated under reduced pressure on a rotary evaporator to obtain a wine-red thick liquid, and a yellow solid is precipitated after freezing. Filter and dry to obtain a light yellow solid; recrystallize from petroleum ether to obtain hydroxybutenolactone (compound 2), 158 g of white needle-like crystals, yield 64%, m.p.54-55°C.
Embodiment 2
[0039] The synthesis of embodiment 2,5-methoxyl group-2(5H)-furanone (compound 3)
[0040] 20g (200mmol) of hydroxybutene lactone (compound 2) was dissolved in 80mL of methanol, the oil bath was heated to reflux (about 72h), and the reaction was tracked by TLC; after the reaction was completed, methanol was evaporated under reduced pressure on a rotary evaporator to obtain crude Product; vacuum distillation or flash column chromatography (petroleum ether / acetone=20:1) to obtain 5-methoxy-2(5H)-furanone (compound 3), colorless liquid, 16g, yield 70% .
Embodiment 3
[0041] Embodiment 3, the synthesis of 5-methoxy-3-bromo-2 (5H)-furanone (compound 4)
[0042] Dissolve 16g (140.4mmol) of 5-methoxy-2(5H)-furanone (compound 3) in 140mL of benzene, then slowly add Br 2 , stir evenly at room temperature, cool the ice-water bath to 0°C, and slowly add pyridine dropwise. After the addition, remove the ice-water bath, stir at room temperature, and react for about 1.5 hours; Dissolve, separate the organic layer, wash with saturated brine, and then add anhydrous magnesium sulfate to dry; filter, evaporate the solvent under reduced pressure, and obtain the crude product by vacuum distillation or flash column chromatography (petroleum ether / acetone=20:1) , to obtain 5-methoxy-3-bromo-2(5H)-furanone (compound 4), light yellow liquid, 20 g, yield 73.8%.
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