4-(chloromethyl)-1-methoxy-2-phenylmethoxybenzene

Conditions: temp:-30.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Under an atmosphere of nitrogen, 3-benzyloxy-4-methoxybenzyl magnesium chloride is prepared from 3-benzyloxy-4-methoxybenzylchloride (C. Schopf and L. Winterhalder, Ann. 544, 62 (1940) (22.0 g, 84 mmol) and magnesium turnings (4.1 g) in tetrahydrofuran (THF) (100 ml) at room temperature (about 2 hours). After cooling to -30° C., a solution of fluoroacetonitrile (4.94 g) in THF (40 ml) is added dropwise, maintaining the temperature between -30° C. and -40° C. Stirring is continued at this temperature for another 30 minutes, then the mixture is poured into a solution of sodium cyanide (12.3 g) and ammonium chloride (17.9 g) in water (150 ml), previously cooled with ice. After stirring for 30 minutes, the mixture is saturated with sodium chloride whereupon the phases separate. After extracting the aqueous phase two more times with diethyl ether, the combined THF and ether phases are dried (Na2SO4) and evaporated to give the crude aminonitrile (25.9 g) as a brown oil. The oil is dissolved in ether and treated with HCl gas to prepare the hydrochloride as an oil. This oil is recrystallized twice from ethanol/ether to give 2-fluoromethyl-2-amino-3-(3'-benzyloxy-4'-methoxyphenyl)propionitrile as the hydrochloride as a slightly colored solid; NMR (CD3OC): 3.47 ppm (3H, s), 4.32 ppm (2H, d, JH--F =46 Hz), 4.73 ppm (2H, s), 6.60 ppm (3H, m), 6.97 ppm (5H, m). at room temperature (about 2 hours) maintaining the temperature between -30° C. and -40° C previously cooled with ice After stirring for 30 minutes separate After extracting the aqueous phase two more times with diethyl ether the combined THF and ether phases are dried (Na2SO4) evaporated to give the crude aminonitrile (25.9 g) as a brown oil

Conditions: temp:-30.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Under an atmosphere of nitrogen, 3-benzyloxy-4-methoxybenzyl magnesium chloride is prepared from 3-benzyloxy-4-methoxybenzylchloride (C. Schopf and L. Winterhalder, Ann. 544, 62 (1940) (22.0 g, 84 mmol) and magnesium turnings (4.1 g) in tetrahydrofuran (THF) (100 ml) at room temperature (about 2 hours). After cooling to -30° C., a solution of fluoroacetonitrile (4.94 g) in THF (40 ml) is added dropwise, maintaining the temperature between -30° C. and -40° C. Stirring is continued at this temperature for another 30 minutes, then the mixture is poured into a solution of sodium cyanide (12.3 g) and ammonium chloride (17.9 g) in water (150 ml), previously cooled with ice. After stirring for 30 minutes, the mixture is saturated with sodium chloride whereupon the phases separate. After extracting the aqueous phase two more times with diethyl ether, the combined THF and ether phases are dried (Na2SO4) and evaporated to give the crude aminonitrile (25.9 g) as a brown oil. The oil is dissolved in ether and treated with HCl gas to prepare the hydrochloride as an oil. This oil is recrystallized twice from ethanol/ether to give 2-fluoromethyl-2-amino-3-(3'-benzyloxy-4'-methoxyphenyl)propionitrile as the hydrochloride as a slightly colored solid; NMR (CD3OC): 3.47 ppm (3H, s), 4.32 ppm (2H, d, JH--F =46 Hz), 4.73 ppm (2H, s), 6.60 ppm (3H, m), 6.97 ppm (5H, m). at room temperature (about 2 hours) maintaining the temperature between -30° C. and -40° C previously cooled with ice After stirring for 30 minutes separate After extracting the aqueous phase two more times with diethyl ether the combined THF and ether phases are dried (Na2SO4) evaporated to give the crude aminonitrile (25.9 g) as a brown oil

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In analogy to the method described in example A1, 6.11 g (38 mmol) of 4-amino-5-chloro-2,6-dimethylpyrimidine, 10.5 g (40 mmol) of 3-benzyloxy-4-methoxybenzyl chloride and 1.52 g (38 mmol) of sodium hydride (60% suspension in liquid paraffin) are reacted in a total of 225 ml of N-methylpyrrolidone. After chromatography on silica gel (mobile phase: toluene/dioxane=10:1) and crystallization from petroleum ether, the title compound is isolated as a pale beige solid. Yield: 5.2 g (36% of theory). m.p.: 111-117° C. After chromatography on silica gel (mobile phase: toluene/dioxane=10:1) and crystallization from petroleum ether

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In analogy to the method described in example A1, 6.11 g (38 mmol) of 4-amino-5-chloro-2,6-dimethylpyrimidine, 10.5 g (40 mmol) of 3-benzyloxy-4-methoxybenzyl chloride and 1.52 g (38 mmol) of sodium hydride (60% suspension in liquid paraffin) are reacted in a total of 225 ml of N-methylpyrrolidone. After chromatography on silica gel (mobile phase: toluene/dioxane=10:1) and crystallization from petroleum ether, the title compound is isolated as a pale beige solid. Yield: 5.2 g (36% of theory). m.p.: 111-117° C. After chromatography on silica gel (mobile phase: toluene/dioxane=10:1) and crystallization from petroleum ether

Conditions: temp:-30.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Under an atmosphere of nitrogen, 3-benzyloxy-4-methoxybenzyl magnesium chloride is prepared from 3-benzyloxy-4-methoxybenzylchloride (C. Schopf and L. Winterhalder, Ann. 544, 62 (1940) (22.0 ng, 84 mmol) and magnesium turnings (4.1 g) in tetrahydrofuran (THF) (100 ml) at room temperature (about 2 hours). After cooling to -30° C., a solution of fluoroacetonitrile (4.94 g) in THF (40 ml) is added dropwise, maintaining the temperature between -30° C. and -40° C. Stirring is continued at this temperature for another 30 minutes, then the mixture is poured into a solution of sodium cyanide (12.3 g) and ammonium chloride (17.9 g) in water (150 ml), previously cooled with ice. After stirring for 30 minutes, the mixture is saturated with sodium chloride whereupon the phases separate. After extracting the aqueous phase two more times with diethyl ether, the combined THF and ether phases are dried (Na2SO4) and evaporated to give the crude aminonitrile (25.9 g) as a brown oil. The oil is dissolved in ether and treated with HCl gas to prepare the hydrochloride as an oil. This oil is recrystallized twice from ethanol/ether to give 2-fluoromethyl-2-amino-3-(3'-benzyloxy-4'-methoxyphenyl)propionitrile as the hydrochloride as a slightly colored solid; at room temperature (about 2 hours) maintaining the temperature between -30° C. and -40° C previously cooled with ice After stirring for 30 minutes separate After extracting the aqueous phase two more times with diethyl ether the combined THF and ether phases are dried (Na2SO4) evaporated to give the crude aminonitrile (25.9 g) as a brown oil

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Thionyl chloride (64 ml) was added over 10 minutes to a stirred solution of the above alcohol in dichloromethane (500 ml). After 20 minutes the mixture was evaporated to dryness, in vacuo, toluene (2×75 ml) added, and evaporation in vacuo repeated to give crude 3-benzyloxy-4-methoxy-benzyl chloride (97.85 g, 105.5%). The chloride (353 mmole) was dissolved in acetone, (400 ml) treated with sodium thiocyanate, (57.22 g ,706 mmole) homogenized and heated under reflux for 1.5 hours. The solid was filtered off at room temperature and the solvent evaporated in vacuo. The residue was suspended in water (600 ml) to give a solution of pH 2, and neutralized with sodium bicarbonate solution. After crystallization the solid was collected, dried, dissolved in dichloromethane (300 ml) , dried (Na2SO4), treated with charcoal, filtered and evaporated to dryness. The residue was crystallized from petroleum ether (400 ml) to give 3-benzyloxy-4-methoxy-benzyl thiocyanate (95.65 g, 95.0%), mp 70-74° C. The thiocyanate (335 mmole) was heated under reflux in n-valeronitrile (280ml) for 2 hours and evaporated to dryness to give 98.4 g of crude product. This was dissolved in THF (200 ml) and treated with 32% aqueous ammonia solution (101 ml) at room temperature. After 3 hours the thiourea was collected at 10° C. and washed with diethyl ether to give 1-(3-benzyloxy-4-methoxy-benzyl)-2-thiourea (63.08 g, 62.2%), mp 179-181° C. The filtrate was evaporated to dryness and the residue crystallized from dichloromethane to give 11.51 g (11.3%) as a second crop. After 20 minutes the mixture was evaporated to dryness, in vacuo, toluene (2×75 ml) added evaporation in vacuo

Conditions: temp:-30.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Under an atmosphere of nitrogen, 3-benzyloxy-4-methoxybenzyl magnesium chloride is prepared from 3-benzyloxy-4-methoxybenzylchloride (C. Schopf and L. Winterhalder, Ann. 544, 62 (1940) (22.0 g, 84 mmol) and magnesium turnings (4.1 g) in tetrahydrofuran (THF) (100 ml) at room temperature (about 2 hours). After cooling to -30° C., a solution of fluoroacetonitrile (4.94 g) in THF (40 ml) is added dropwise, maintaining the temperature between -30° C. and -40° C. Stirring is continued at this temperature for another 30 minutes, then the mixture is poured into a solution of sodium cyanide (12.3 g) and ammonium chloride (17.9 g) in water (150 ml), previously cooled with ice. After stirring for 30 minutes, the mixture is saturated with sodium chloride whereupon the phases separate. After extracting the aqueous phase two more times with diethyl ether, the combined THF and ether phases are dried (Na2SO4) and evaporated to give the crude aminonitrile (25.9 g) as a brown oil. The oil is dissolved in ether and treated with HCl gas to prepare the hydrochloride as an oil. This oil is recrystallized twice from ethanol/ether to give 2-fluoromethyl-2-amino-3-(3'-benzyloxy-4'-methoxyphenyl)propionitrile as the hydrochloride as a slightly colored solid; NMR (CD3OC): 3.47 ppm (3H, s), 4.32 ppm (2H, d, JH--F =46 Hz), 4.73 ppm (2H, s), 6.60 ppm (3H, m), 6.97 ppm (5H, m). at room temperature (about 2 hours) maintaining the temperature between -30° C. and -40° C previously cooled with ice After stirring for 30 minutes separate After extracting the aqueous phase two more times with diethyl ether the combined THF and ether phases are dried (Na2SO4) evaporated to give the crude aminonitrile (25.9 g) as a brown oil