反应 #3731270
相关文献 (1)
openreactiondata ↗doi:10.6084/m9.figshare.5104873.v1; patent:US06803484B2
反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.
实验步骤: An oven dried 250.0 mL three necked round bottom flask equipped with a mechanical stirrer, thermometer, addition funnel with a continuous nitrogen blanket is charged with (2R)-2-phenylpropan-1-ol (2.0 mL, 14.32 mmol), phthalimide (2.1 g, 14.32 mmol), triphenylphosphine (5.63 g, 21.48 mmol) and THF (70.0 mL). To this solution at room temperature was then added a solution of diethylazodicarboxylate (3.38 mL, 21.48 mmol) dissolved in THF (10.0 mL) over a period of 15-20 minutes (reaction exothermed slightly to 50° C. by the end of addition went from clear to reddish color). Stirred reaction to room temperature overnight). To the red solution was added water (50.0 mL) and the organic extracted with chloroform (140.0 mL). Dried the organic solution with anhydrous magnesium sulfate, filtered and concentrated under reduced pressure to an oil. To the oil was added heptane (150.0 mL) with stirring. Filtered of precipitates, then concentrated filtrate to an oil. Plug filtration of the oil over silica gel with 1:1 ethylacetate/hexane and concentrating product fractions afforded the intermediate title compound, 2((2R)-2-phenylpropyl)isoindoline-1,3-dione, (4.27 g, 96%) as an oil which solidified on equilibrating to room temperature; 1H nmr (CDCl3, 300 MHz) δ 1.3 (d, 3H), 3.3-4.0 (m, 1H), 3.7-3.9 (m, 2H), 7.1-7.3 (aromat. m, 2H), 7.63-7.7 (aromat. m, 2H), 7.8-7.85 (aromat. m, 4H). An oven dried 250.0 mL three necked round bottom flask equipped with a mechanical stirrer thermometer, addition funnel with a continuous nitrogen blanket reaction exothermed slightly to 50° C. by the end of addition reaction to room temperature overnight) the organic extracted with chloroform (140.0 mL) Dried the organic solution with anhydrous magnesium sulfate filtered concentrated under reduced pressure to an oil To the oil was added heptane (150.0 mL) with stirring Filtered of precipitates Plug filtration of the oil over silica gel with 1:1 ethylacetate/hexane concentrating product fractions
来源 ID: ord-6b7c7862200f45cb831e7670afac6668