Preparation method and application of fatty dioic acid derivative
A fatty diacid and derivative technology, applied in the field of biomedicine, can solve the problems of high impurities, decomposition of insulin peptide chain, and unsuitable for industrial scale-up production.
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Embodiment 1
[0086] 1. Preparation of mono-tert-butyl hexadecanedioic acid
[0087]
[0088] Hexadecanedioic acid (20.0 g, 69.8 mmol) was suspended in thionyl chloride (100 ml, 1376.8 mmol), heated to reflux at 80° C. for 3 hours, and excess thionyl chloride was distilled off under reduced pressure. Add dichloromethane (200ml) to dissolve, add tert-butanol (7.34ml, 76.81mmol) and pyridine (5.9ml, 73.32mmol), add pyridine within 2 hours, and react at 25°C for 3h. The solvent was evaporated to dryness under reduced pressure, and 600ml of DMF / water mixed solvent precooled to 0-4°C was added (DMF and water were mixed in a volume ratio of 1:2), and the precipitate was collected by filtration. Vacuum dry to constant weight, add dichloromethane (300ml) to resuspend, collect the filtrate and evaporate the solvent under reduced pressure, add petroleum ether (400ml) to resuspend, collect the filtrate and evaporate to dryness under reduced pressure, add n-heptane (80ml) for recrystallization , th...
Embodiment 2
[0112] 1. Preparation of tert-butyl tetradecanedioate
[0113]
[0114] Tetradecanedioic acid (20.0g, 77.4mmol) was suspended in dichloromethane (200ml), and catalytic equivalents of DMF (89.8μl, 1.16mmol) and thionyl chloride (33.73ml, 464.4mmol) were added respectively, at 25°C Stir overnight until dissolved. The solvent was distilled off under reduced pressure, dichloromethane (200ml) was added to dissolve, tert-butanol (8.07ml, 84.49mmol) and pyridine (6.5ml, 80.65mmol) were added, pyridine was added within 2 hours, and reacted at 20°C for 3h. The solvent was evaporated to dryness under reduced pressure, and 600ml of DMF / water mixed solvent precooled to 0-4°C was added (DMF and water were mixed in a ratio of 1:3 by volume), and the precipitate was collected by filtration. Vacuum dry to constant weight, add dichloromethane (300ml) to resuspend, collect the filtrate and evaporate the solvent under reduced pressure, add petroleum ether (400ml) to resuspend, collect the fi...
Embodiment 3
[0134] 1. Preparation of mono-tert-butyl octadecanedioate
[0135]
[0136] Suspend octadecanedioic acid (20.0g, 63.6mmol) in dichloromethane (200ml), add catalytic equivalents of DMF (73.8μl, 0.95mmol) and thionyl chloride (27.72ml, 381.6mmol) respectively, and stir at room temperature Leave overnight until dissolved. The solvent was distilled off under reduced pressure, dichloromethane (200ml) was added to dissolve, tert-butanol (6.63ml, 69.43mmol) and pyridine (5.34ml, 66.27mmol) were added. Pyridine was added within 2 hours and reacted at 25°C for 3h. The solvent was evaporated to dryness under reduced pressure, and 600ml of DMF / water mixed solvent precooled to 0-4°C was added (DMF and water were mixed in a volume ratio of 1:2), and the precipitate was collected by filtration. Vacuum dry to constant weight, add dichloromethane (200ml) to resuspend, collect the filtrate and evaporate the solvent under reduced pressure, add petroleum ether (400ml) to resuspend, collect t...
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