二苯亚甲基高丝氨酸内酯

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:40.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Potassium bis-(trimethylsilyl)amide (2.67, 13.4 mMol) was dissolved in anhydrous THF (50 mL) under an atmosphere of dry N2. The mixture was cooled to 40° C. to which was added a solution of 3-(benzhydrylidene-amino)-dihydro-furan-2-one (3.38 g, 12.7 mMol) in THF (30 mL). The mixture was warmed to ambient temperature and stirred at this temperature for 30 minutes. The solution was then cooled to 40° C. and a solution of 4-picolyl chloride (1.70 g, 13.4 mMol) in THF (20 mL) was added. The reaction mixture was warmed to ambient temperature and stirred for 18 hours. The mixture was partitioned between ethyl acetate-(EtOAc) and water. The mixture was warmed to ambient temperature The solution was then cooled to 40° C. The reaction mixture was warmed to ambient temperature stirred for 18 hours The mixture was partitioned between ethyl acetate-(EtOAc) and water

反应条件: temp:-40.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Potassium bis-(trimethylsilyl)amide (2.67, 13.4 mMol) was dissolved in anhydrous THF (50 mL) under an atmosphere of dry N2. The mixture was cooled to -40° C. to which was added a solution of 3-(benzhydrylidene-amino)-dihydro-furan-2-one (3.38 g, 12.7 mMol) in THF (30 mL). The mixture was warmed to ambient temperature and stirred at this temperature for 30 minutes. The solution was then cooled to -40° C. and a solution of 4-picolyl chloride (1.70 g, 13.4 mMol) in THF (20 mL) was added. The reaction mixture was warmed to ambient temperature and stirred for 18 hours. The mixture was partitioned between ethyl acetate-(EtOAc) and water. The organic layer was dried over sodium sulfate (Na2SO4), filtered and concentrated under vacuum to give a yellow oil. The oil was chromatographed on flash silica gel eluting with a gradient of EtOAc-hexanes (50:50) to EtOAc-hexanes (60:40 ) to give 2.26 g of the titled compound as an oil which crystallizes to a white solid upon standing. The mixture was warmed to ambient temperature The solution was then cooled to -40° C. The reaction mixture was warmed to ambient temperature stirred for 18 hours The mixture was partitioned between ethyl acetate-(EtOAc) and water The organic layer was dried over sodium sulfate (Na2SO4) filtered concentrated under vacuum to give a yellow oil The oil was chromatographed on flash silica gel eluting with a gradient of EtOAc-hexanes (50:50) to EtOAc-hexanes (60:40 )

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of 3-[(diphenylmethylene)amino]dihydrofuran-2(3H)-one (1 g, 3.8 mmol) in DMF (10 mL) cooled to 0° C. was added NaHMDS (4.7 mL, 4.7 mmol, 1M THF) via serynge slowly. The resulting bright orange solution was stirred at 0° C. for 2 min at which point benzyl bromide (0.47 mL, 4 mmol) was addedvia serynge. After 5 min stirring at 0° C., the reaction was quenched with water, extracted with EtOAc, washed with aqueous LiCl, dried over sodium sulfate, concentrated in vacuo, and purified by flash chromatography (90 g silica gel, 0 to 40% EtOAc in hexane) to give 3-benzyl-3-[(diphenylmethylene)amino]dihydrofuran-2(3H)-one as a white solid. MS M+1=356. the reaction was quenched with water extracted with EtOAc washed with aqueous LiCl dried over sodium sulfate concentrated in vacuo purified by flash chromatography (90 g silica gel, 0 to 40% EtOAc in hexane)

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of 3-aminodihydrofuran-2(3H)-one hydrobromide (5 g, 27.5 mmol) in DCM (50 mL) was added benzophenone imine (5 g, 27.5 mmol) and the reaction mixture was stirred at RT for 3 days. The reaction mixture was diluted with water and DCM, the organic layer was extracted, washed with aquous sodium bicarbonate, brine, dried over sodium sulfate and concentrated in vacuo to give 3-[(diphenylmethylene)amino]dihydrofuran-2(3H)-one as a thick colorless gel which crystallized to a white solid. the organic layer was extracted washed with aquous sodium bicarbonate, brine dried over sodium sulfate concentrated in vacuo

反应条件: temp:40.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Potassium bis-(trimethylsilyl)amide (2.67, 13.4 mMol) was dissolved in anhydrous THF (50 mL) under an atmosphere of dry N2. The mixture was cooled to 40° C. to which was added a solution of 3-(benzhydrylidene-amino)-dihydro-furan-2-one (3.38 g, 12.7 mMol) in THF (30 mL). The mixture was warmed to ambient temperature and stirred at this temperature for 30 minutes. The solution was then cooled to 40° C. and a solution of 4-picolyl chloride (1.70 g, 13.4 mMol) in THF (20 mL) was added. The reaction mixture was warmed to ambient temperature and stirred for 18 hours. The mixture was partitioned between ethyl acetate-(EtOAc) and water. The mixture was warmed to ambient temperature The solution was then cooled to 40° C. The reaction mixture was warmed to ambient temperature stirred for 18 hours The mixture was partitioned between ethyl acetate-(EtOAc) and water