2-(4-氧代哌啶-1-基)乙烷腈

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

实验步骤: A solution of 10.0 g of 4-oxo-1-piperidineacetonitrile, 22.6 g of ethylene glycol and 0.62 g of anhydrous p-toluenesulfonic acid in 100 ml of toluene was refluxed for 6 hours with Dean-stark dehydrating apparatus. After cooling, the reaction mixture was added with saturated aqueous sodium hydrogencarbonate solution and extracted with ethyl acetate. The extract was dried, and the solvent was evaporated to give a pale brown liquid. The resulting liquid was purified by alumina column chromatography using ethyl acetate—n-heptane (1:3) as an eluting solvent to give 12.8 g of a colorless liquid. After cooling extracted with ethyl acetate The extract was dried the solvent was evaporated to give a pale brown liquid The resulting liquid was purified by alumina column chromatography

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

实验步骤: A suspension of 25.0 g of 4-piperidinone monohydrochloride monohydrate, 11.5 ml of chloroacetonitrile and 57.0 ml of diisopropylethylamine in 250 ml of tetrahydrofuran was refluxed for 10 hours. After the reaction, an insoluble matter was filtered off. The filtrate was added with saturated aqueous sodium hydrogencarbonate solution and extracted with a mixture of ethyl acetate and methanol (10:1). The extract was dried, and the solvent was evaporated to give brown crystals. The crystals were washed with a mixture of ethyl acetate and n-heptane to give 15.7 g of pale brown crystals. was refluxed for 10 hours After the reaction an insoluble matter was filtered off The filtrate was added with saturated aqueous sodium hydrogencarbonate solution extracted with a mixture of ethyl acetate and methanol (10:1) The extract was dried the solvent was evaporated to give brown crystals The crystals were washed with a mixture of ethyl acetate and n-heptane

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

实验步骤: A solution of 10.0 g of 4-oxo-1-piperidineacetonitrile, 22.6 g of ethylene glycol and 0.62 g of anhydrous p-toluenesulfonic acid in 100 ml of toluene was refluxed for 6 hours with Dean-stark dehydrating apparatus. After cooling, the reaction mixture was added with saturated aqueous sodium hydrogencarbonate solution and extracted with ethyl acetate. The extract was dried, and the solvent was evaporated to give a pale brown liquid. The resulting liquid was purified by alumina column chromatography using ethyl acetate—n-heptane (1:3) as an eluting solvent to give 12.8 g of a colorless liquid. After cooling extracted with ethyl acetate The extract was dried the solvent was evaporated to give a pale brown liquid The resulting liquid was purified by alumina column chromatography

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

实验步骤: A suspension of 25.0 g of 4-piperidinone monohydrochloride monohydrate, 11.5 ml of chloroacetonitrile and 57.0 ml of diisopropylethylamine in 250 ml of tetrahydrofuran was refluxed for 10 hours. After the reaction, an insoluble matter was filtered off. The filtrate was added with saturated aqueous sodium hydrogencarbonate solution and extracted with a mixture of ethyl acetate and methanol (10:1). The extract was dried, and the solvent was evaporated to give brown crystals. The crystals were washed with a mixture of ethyl acetate and n-heptane to give 15.7 g of pale brown crystals. was refluxed for 10 hours After the reaction an insoluble matter was filtered off The filtrate was added with saturated aqueous sodium hydrogencarbonate solution extracted with a mixture of ethyl acetate and methanol (10:1) The extract was dried the solvent was evaporated to give brown crystals The crystals were washed with a mixture of ethyl acetate and n-heptane