2,6-二乙基异氰酸苯酯

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

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: To a suspension of 10.0 g. (30.0 mmol) of N-methoxy-N'-methyl guanidine picrate in tetrahydrofuran (60 ml.) are added 2.4 g. (30.0 mmol) of fifty percent (w/w) aqueous sodium hydroxide and the mixture stirred for 11/2 hours. Five (5.0) grams of anhydrous sodium sulfate is added and the mixture stirred for an additional one-half hour. To this mixture is added a solution of 4.8 g. (30.0 mmol) of 2,6-diethylphenylisocyanate in tetrahydrofuran (20 ml.) and the mixture stirred over night. The mixture is partitioned between chloroform and water and the layers are separated. The chloroform layer is washed well with dilute aqueous sodium hydroxide until most of the color is removed when dried over anhydrous magnesium sulfate, filtered and concentrated to give an oil which is dissolved in methanol and acidified with methanolic hydrochloric acid. The methanol is removed under vacuum to give a gummy foam which is crystallized from methanol/ethyl acetate to give 1-(2,6-diethylphenyl)-3-(N-methoxy-N'-methylamidino)urea hydrochloride, m.p. 159.5°-160.5° C. To a suspension of 10.0 g To this mixture is added a solution of 4.8 g The mixture is partitioned between chloroform and water the layers are separated The chloroform layer is washed well with dilute aqueous sodium hydroxide until most of the color is removed when dried over anhydrous magnesium sulfate filtered concentrated to give an oil which The methanol is removed under vacuum to give a gummy foam which is crystallized from methanol/ethyl acetate

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

实验步骤: To a suspension of 10.0 g. (30.0 mmol) of N-methoxy-N'-methyl guanidine picrate in tetrahydrofuran (60 ml.) are added 2.4 g. (30.0 mmol) of fifty percent (w/w) aqueous sodium hydroxide and the mixture stirred for 11/2 hours. Five (5.0) grams of anhydrous sodium sulfate is added and the mixture stirred for an additional one-half hour. To this mixture is added a solution of 4.8 g. (30.0 mmol) of 2,6-diethylphenylisocyanate in tetrahydrofuran (20 ml.) and the mixture stirred over night. The mixture is partitioned between chloroform and water and the layers are separated. The chloroform layer is washed well with dilute aqueous sodium hydroxide until most of the color is removed when dried over anhydrous magnesium sulfate, filtered and concentrated to give an oil which is dissolved in methanol and acidified with methanolic hydrochloric acid. The methanol is removed under vacuum to give a gummy foam which is crystallized from methanol/ethyl acetate to give 1-(2,6-diethylphenyl)-3-(N-methoxy-N'-methylamidino)urea hydrochloride, m.p. 159.5°-160.5° C. To a suspension of 10.0 g To this mixture is added a solution of 4.8 g The mixture is partitioned between chloroform and water the layers are separated The chloroform layer is washed well with dilute aqueous sodium hydroxide until most of the color is removed when dried over anhydrous magnesium sulfate filtered concentrated to give an oil which The methanol is removed under vacuum to give a gummy foam which is crystallized from methanol/ethyl acetate

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

实验步骤: To the solution of 2 g of N-(4-phenylcyclohexyl)-N-cyclohexylmethylamine in dichloromethane was added 2 ml of pyridine and to the mixture was added a solution of 1.6 g of 2,6-diethylphenylisocyanate in 30 ml of dichloromethane dropwise. After the mixture was stirred at room temperature, to the solution was added diluted hydrochloric acid and extracted with ethyl acetate. The extract was washed with water, aqueous sodium hydrogencarbonate solution and saturated brine and then dried over magnesium sulfate. The solvent was distilled away in vacuo to give 2 g of crude crystals. The crystals were recrystallized from the mixture of ethyl acetate and hexane to give 1.2 g of N-(2,6-diethylphenyl)-N'-cyclohexylmethyl-N'-(4-phenylcyclohexyl)urea, melting at 166°-168° C. extracted with ethyl acetate The extract was washed with water, aqueous sodium hydrogencarbonate solution and saturated brine dried over magnesium sulfate The solvent was distilled away in vacuo to give 2 g of crude crystals The crystals were recrystallized from the mixture of ethyl acetate and 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 1 g of 4-phenylcyclohexylamine in 10 ml of dichloromethane was added 2,6-diethylphenylisocyanate dropwise in the presence of pyridine and the mixture was stirred for 2 hours at room temperature. To the resultant mixture was added 30 ml of diluted hydrochloric acid and the solution was extracted with chloroform. The extract was washed with water, aqueous sodium hydrogencarbonate solution and saturated brine, and then dried over magnesium sulfate. The solvent was distilled away and the residue was crystallized from methanol to give 0.4 g of N-(2,6-diethylphenyl)-N'-(4-phenylcyclohexyl)urea, melting at 247°-249° C. the solution was extracted with chloroform The extract was washed with water, aqueous sodium hydrogencarbonate solution and saturated brine dried over magnesium sulfate The solvent was distilled away the residue was crystallized from methanol

反应条件: temp:0.00; pressure:0.00; stir:

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: To the solution of 2 g of N-(4-phenylcyclohexyl)-N-cyclohexylmethylamine in dichloromethane was added 2 ml of pyridine and to the mixture was added a solution of 1.6 g of 2,6-diethylphenylisocyanate in 30 ml of dichloromethane dropwise. After the mixture was stirred at room temperature, to the solution was added diluted hydrochloric acid and extracted with ethyl acetate. The extract was washed with water, aqueous sodium hydrogencarbonate solution and saturated brine and then dried over magnesium sulfate. The solvent was distilled away in vacuo to give 2 g of crude crystals. The crystals were recrystallized from the mixture of ethyl acetate and hexane to give 1.2 g of N-(2,6-diethylphenyl)-N'-cyclohexylmethyl-N'-(4-phenylcyclohexyl)urea, melting at 166°-168° C. extracted with ethyl acetate The extract was washed with water, aqueous sodium hydrogencarbonate solution and saturated brine dried over magnesium sulfate The solvent was distilled away in vacuo to give 2 g of crude crystals The crystals were recrystallized from the mixture of ethyl acetate and 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 1 g of 4-phenylcyclohexylamine in 10 ml of dichloromethane was added 2,6-diethylphenylisocyanate dropwise in the presence of pyridine and the mixture was stirred for 2 hours at room temperature. To the resultant mixture was added 30 ml of diluted hydrochloric acid and the solution was extracted with chloroform. The extract was washed with water, aqueous sodium hydrogencarbonate solution and saturated brine, and then dried over magnesium sulfate. The solvent was distilled away and the residue was crystallized from methanol to give 0.4 g of N-(2,6-diethylphenyl)-N'-(4-phenylcyclohexyl)urea, melting at 247°-249° C. the solution was extracted with chloroform The extract was washed with water, aqueous sodium hydrogencarbonate solution and saturated brine dried over magnesium sulfate The solvent was distilled away the residue was crystallized from methanol

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

实验步骤: To a solution of 1-phenylcyclobutyl amine (1.0, 0.0057 mole) in 30 ml of ethylacetate, 2,6-diethylphenylisocyanate (0.84 g, 0.0057 mole) is added and the reaction mixture is stirred at room temperature for 20 hours. Precipitated solid is filtered, washed with ethylacetate and dried yielding 1.46 gm of N-(2, 6-diethylphenyl)-N'-(1-phenylcyclobutyl)urea having a melting point of 227°-230° C. Precipitated solid is filtered washed with ethylacetate dried