N-Methylcarbamic acid butyl ester

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 solution of 2-sec butylphenol (1.5 g, 0.01 mole) and ethyl N-methylcarbamate (1.03 g, 0.01 mole) in ethylene dichloride (6 ml) was added phosphoryl chloride (0.77 g, 0.05 mole) and the reaction mixture was refluxed under stirring for twenty hours. It was poured onto ice-cold water. The organic layer separated and aqueous layer was extracted with dichloroethane. The combined organic layer was washed with water, dried (Na2SO4) and distilled to give liquid residue, which was further purified by distillation to give 2-sec butyl N-methylcarbamate of the formula (III) [96% by GLC, DV-101 (3%), 150° C., nitrogen, 30 ml/min.] as a liquid, b.p. 110° C. (vap.)/4 mm; IR: 3320 (N--H), 1730 (--COO--), 1535,1490 and 750 (aromatic); PMR (CDCl3, 90 MHz): 0.81 (3H,t, primary methyl of side chain, 1.58 (2H, m, methylene protons of side chain), 2.88 (4H, doublet overlapping a multiplet, NH--CH3 and benzylic proton), 4.97 (1H, br s, N--H) and 6.95 to 7.25 (4H, m, aromatic). the reaction mixture was refluxed It was poured onto ice-cold water The organic layer separated aqueous layer was extracted with dichloroethane The combined organic layer was washed with water dried (Na2SO4) distilled to give liquid residue, which was further purified by distillation

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

实验步骤: To a solution of 2-sec butylphenol (1.5 g, 0.01 mole) and ethyl N-methylcarbamate (1.03 g, 0.01 mole) in ethylene dichloride (6 ml) was added phosphoryl chloride (0.77 g, 0.05 mole) and the reaction mixture was refluxed under stirring for twenty hours. It was poured onto ice-cold water. The organic layer separated and aqueous layer was extracted with dichloroethane. The combined organic layer was washed with water, dried (Na2SO4) and distilled to give liquid residue, which was further purified by distillation to give 2-sec butyl N-methylcarbamate of the formula (III) [96% by GLC, DV-101 (3%), 150° C., nitrogen, 30 ml/min.] as a liquid, b.p. 110° C. (vap.)/4 mm; IR: 3320 (N--H), 1730 (--COO--), 1535,1490 and 750 (aromatic); PMR (CDCl3, 90 MHz): 0.81 (3H,t, primary methyl of side chain, 1.58 (2H, m, methylene protons of side chain), 2.88 (4H, doublet overlapping a multiplet, NH--CH3 and benzylic proton), 4.97 (1H, br s, N--H) and 6.95 to 7.25 (4H, m, aromatic). the reaction mixture was refluxed It was poured onto ice-cold water The organic layer separated aqueous layer was extracted with dichloroethane The combined organic layer was washed with water dried (Na2SO4) distilled to give liquid residue, which was further purified by distillation

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 solution of 45.2 g (0.44 mole) of sulfur dichloride in 200 ml of methylene chloride cooled to -5° C. under a nitrogen atmosphere was added a solution made up of 50.9 g (0.4 mole) of n-butyl N-methylcarbamate, 44.5 g (0.44 mole) of triethylamine and 100 ml of methylene chloride. The addition took 2 hours while the temperature was maintained at -15° C. to 0° C. After stirring for 1 hour the mixture was filtered under a positive nitrogen atmosphere, and the filtrate was concentrated. Solid was removed by extracting the product with hexanes. After filtration the hexane solution was concentrated to give 57.3 g of n-butyl N-chlorothio-N-methylcarbamate. was added a solution The addition was maintained at -15° C. to 0° C was filtered under a positive nitrogen atmosphere the filtrate was concentrated Solid was removed by extracting the product with hexanes After filtration the hexane solution was concentrated

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

实验步骤: To a solution of 2-sec butylphenol (1.5 g, 0.01 mole) and ethyl N-methylcarbamate (1.03 g, 0.01 mole) in ethylene dichloride (6 ml) was added phosphoryl chloride (0.77 g, 0.05 mole) and the reaction mixture was refluxed under stirring for twenty hours. It was poured onto ice-cold water. The organic layer separated and aqueous layer was extracted with dichloroethane. The combined organic layer was washed with water, dried (Na2SO4) and distilled to give liquid residue, which was further purified by distillation to give 2-sec butyl N-methylcarbamate of the formula (III) [96% by GLC, DV-101 (3%), 150° C., nitrogen, 30 ml/min.] as a liquid, b.p. 110° C. (vap.)/4 mm; IR: 3320 (N--H), 1730 (--COO--), 1535,1490 and 750 (aromatic); PMR (CDCl3, 90 MHz): 0.81 (3H,t, primary methyl of side chain, 1.58 (2H, m, methylene protons of side chain), 2.88 (4H, doublet overlapping a multiplet, NH--CH3 and benzylic proton), 4.97 (1H, br s, N--H) and 6.95 to 7.25 (4H, m, aromatic). the reaction mixture was refluxed It was poured onto ice-cold water The organic layer separated aqueous layer was extracted with dichloroethane The combined organic layer was washed with water dried (Na2SO4) distilled to give liquid residue, which was further purified by distillation