4-苄甲氧基丁醛

反应条件: temp:0.00; pressure:0.00; stir:

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

实验步骤: 8.0 g (44.9 mmol) of 4-benzyloxybutanal, 4.12 g (50.6 mmol) of dimethylammonium chloride and 3.95 ml (52.6 mmol) of 37% formaldehyde solution are kept at a bath temperature of 110° for one hour with stirring. The mixture is allowed to cool and is extracted three times with ether. The organic phases are washed with saturated sodium chloride solution, combined, dried over MgSO4, filtered and concentrated by evaporation. 4-benzyloxy-2-methylenebutanal is obtained in the form of a yellowish oil which can be reacted further without further purification. to cool is extracted three times with ether The organic phases are washed with saturated sodium chloride solution dried over MgSO4 filtered concentrated by evaporation

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

实验步骤: 36.6 g (170 mmol) of pyridinium chlorochromate are placed at room temperature in 120 ml of dichloromethane under N2, and a solution of 20.4 g (113 mmol) of 4-benzyloxybutanol in 20 ml of dichloromethane is added. The reaction mixture rapidly becomes dark and the reaction is slightly exothermic. The reaction mixture is stirred at room temperature for 31/2 hours. The supernatant dichloromethane phase is decanted off and concentrated by evaporation in a rotary evaporator. The residue is filtered over 100 g of silica gel. The product fractions are concentrated by evaporation in a rotary evaporator and distilled under a high vacuum over a 10 cm Vigreux column. 4-benzyloxybutanal is obtained, b.p.0.1 =72°-73°. The supernatant dichloromethane phase is decanted off concentrated by evaporation in a rotary evaporator The residue is filtered over 100 g of silica gel The product fractions are concentrated by evaporation in a rotary evaporator distilled under a high vacuum over a 10 cm Vigreux column

反应条件: temp:0.00; pressure:0.00; stir:

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

实验步骤: 8.0 g (44.9 mmol) of 4-benzyloxybutanal, 4.12 g (50.6 mmol) of dimethylammonium chloride and 3.95 ml (52.6 mmol) of 37% formaldehyde solution are kept at a bath temperature of 110° for one hour with stirring. The mixture is allowed to cool and is extracted three times with ether. The organic phases are washed with saturated sodium chloride solution, combined, dried over MgSO4, filtered and concentrated by evaporation. 4-benzyloxy-2-methylenebutanal is obtained in the form of a yellowish oil which can be reacted further without further purification. to cool is extracted three times with ether The organic phases are washed with saturated sodium chloride solution dried over MgSO4 filtered concentrated by evaporation

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

实验步骤: 36.6 g (170 mmol) of pyridinium chlorochromate are placed at room temperature in 120 ml of dichloromethane under N2, and a solution of 20.4 g (113 mmol) of 4-benzyloxybutanol in 20 ml of dichloromethane is added. The reaction mixture rapidly becomes dark and the reaction is slightly exothermic. The reaction mixture is stirred at room temperature for 31/2 hours. The supernatant dichloromethane phase is decanted off and concentrated by evaporation in a rotary evaporator. The residue is filtered over 100 g of silica gel. The product fractions are concentrated by evaporation in a rotary evaporator and distilled under a high vacuum over a 10 cm Vigreux column. 4-benzyloxybutanal is obtained, b.p.0.1 =72°-73°. The supernatant dichloromethane phase is decanted off concentrated by evaporation in a rotary evaporator The residue is filtered over 100 g of silica gel The product fractions are concentrated by evaporation in a rotary evaporator distilled under a high vacuum over a 10 cm Vigreux column

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

实验步骤: 36.6 g (170 mmol) of pyridinium chlorochromate are placed at room temperature in 120 ml of dichloromethane under N2, and a solution of 20.4 g (113 mmol) of 4-benzyloxybutanol in 20 ml of dichloromethane is added. The reaction mixture rapidly becomes dark and the reaction is slightly exothermic. The reaction mixture is stirred at room temperature for 31/2 hours. The supernatant dichloromethane phase is decanted off and concentrated by evaporation in a rotary evaporator. The residue is filtered over 100 g of silica gel. The product fractions are concentrated by evaporation in a rotary evaporator and distilled under a high vacuum over a 10 cm Vigreux column. 4-benzyloxybutanal is obtained, b.p.0.1 =72°-73°. The supernatant dichloromethane phase is decanted off concentrated by evaporation in a rotary evaporator The residue is filtered over 100 g of silica gel The product fractions are concentrated by evaporation in a rotary evaporator distilled under a high vacuum over a 10 cm Vigreux column

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

实验步骤: 8.0 g (44.9 mmol) of 4-benzyloxybutanal, 4.12 g (50.6 mmol) of dimethylammonium chloride and 3.95 ml (52.6 mmol) of 37% formaldehyde solution are kept at a bath temperature of 110° for one hour with stirring. The mixture is allowed to cool and is extracted three times with ether. The organic phases are washed with saturated sodium chloride solution, combined, dried over MgSO4, filtered and concentrated by evaporation. 4-benzyloxy-2-methylenebutanal is obtained in the form of a yellowish oil which can be reacted further without further purification. to cool is extracted three times with ether The organic phases are washed with saturated sodium chloride solution dried over MgSO4 filtered concentrated by evaporation

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

实验步骤: 36.6 g (170 mmol) of pyridinium chlorochromate are placed at room temperature in 120 ml of dichloromethane under N2, and a solution of 20.4 g (113 mmol) of 4-benzyloxybutanol in 20 ml of dichloromethane is added. The reaction mixture rapidly becomes dark and the reaction is slightly exothermic. The reaction mixture is stirred at room temperature for 31/2 hours. The supernatant dichloromethane phase is decanted off and concentrated by evaporation in a rotary evaporator. The residue is filtered over 100 g of silica gel. The product fractions are concentrated by evaporation in a rotary evaporator and distilled under a high vacuum over a 10 cm Vigreux column. 4-benzyloxybutanal is obtained, b.p.0.1 =72°-73°. The supernatant dichloromethane phase is decanted off concentrated by evaporation in a rotary evaporator The residue is filtered over 100 g of silica gel The product fractions are concentrated by evaporation in a rotary evaporator distilled under a high vacuum over a 10 cm Vigreux column

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

实验步骤: 36.6 g (170 mmol) of pyridinium chlorochromate are placed at room temperature in 120 ml of dichloromethane under N2, and a solution of 20.4 g (113 mmol) of 4-benzyloxybutanol in 20 ml of dichloromethane is added. The reaction mixture rapidly becomes dark and the reaction is slightly exothermic. The reaction mixture is stirred at room temperature for 31/2 hours. The supernatant dichloromethane phase is decanted off and concentrated by evaporation in a rotary evaporator. The residue is filtered over 100 g of silica gel. The product fractions are concentrated by evaporation in a rotary evaporator and distilled under a high vacuum over a 10 cm Vigreux column. 4-benzyloxybutanal is obtained, b.p.0.1 =72°-73°. The supernatant dichloromethane phase is decanted off concentrated by evaporation in a rotary evaporator The residue is filtered over 100 g of silica gel The product fractions are concentrated by evaporation in a rotary evaporator distilled under a high vacuum over a 10 cm Vigreux column

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

实验步骤: 4-benzyloxybutanal (1.463 g, 8.2 mmol), methyl-4-nitrobutyrate (1.29 g, 8.8 mmol) and (−)-sparteine (206 mg, 0.88 mmol) are combined and stirred at RT for 6 hours. EtOAc (5 mL) is added, and the solution is filtered through silica. The solvent is removed in vacuo to yield a pale yellow oil. the solution is filtered through silica The solvent is removed in vacuo to yield a pale yellow oil

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

实验步骤: 8.0 g (44.9 mmol) of 4-benzyloxybutanal, 4.12 g (50.6 mmol) of dimethylammonium chloride and 3.95 ml (52.6 mmol) of 37% formaldehyde solution are kept at a bath temperature of 110° for one hour with stirring. The mixture is allowed to cool and is extracted three times with ether. The organic phases are washed with saturated sodium chloride solution, combined, dried over MgSO4, filtered and concentrated by evaporation. 4-benzyloxy-2-methylenebutanal is obtained in the form of a yellowish oil which can be reacted further without further purification. to cool is extracted three times with ether The organic phases are washed with saturated sodium chloride solution dried over MgSO4 filtered concentrated by evaporation