3-甲氧苄基异氰酸酯

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: 1.1 3.3 g of tert-butyl 3,5-diaminoindazole-1-carboxylate (13.3 mmol) and 2.0 g of 1-isocyanatomethyl-3-methoxybenzene (12.3 mmol) are stirred at RT for 24 hours in 40 ml of dichloromethane. The reaction mixture is washed with water, the organic phase is separated off, dried and evaporated. Purification of the residue by column chromatography (eluent ethyl acetate) gives 3.5 g of tert-butyl-3-amino-5-[3-(3-methoxybenzyl)ureido]indazole-1-carboxylate (64%); MS-FAB (M+H+)=412. The reaction mixture is washed with water the organic phase is separated off dried evaporated Purification of the residue by column chromatography (eluent ethyl acetate)

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

实验步骤: 1.1 3.3 g of tert-butyl 3,5-diaminoindazole-1-carboxylate (13.3 mmol) and 2.0 g of 1-isocyanatomethyl-3-methoxybenzene (12.3 mmol) are stirred at RT for 24 hours in 40 ml of dichloromethane. The reaction mixture is washed with water, the organic phase is separated off, dried and evaporated. Purification of the residue by column chromatography (eluent ethyl acetate) gives 3.5 g of tert-butyl-3-amino-5-[3-(3-methoxybenzyl)ureido]indazole-1-carboxylate (64%); MS-FAB (M+H+)=412. The reaction mixture is washed with water the organic phase is separated off dried evaporated Purification of the residue by column chromatography (eluent ethyl acetate)

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: Meta-methoxybenzyl isocyanate (Sigma Aldrich) (0.390 g, 2.4 mmol) was added drop wise to a suspension of 5-diazoimidazole-4-carboxamide (0.274 g, 2 mmol) in dry dimethylsulfoxide (2.5 mL) at room temperature under nitrogen. The resulting mixture was stirred at room temperature overnight. The reaction was quenched by the addition of ice and the solid product (off-white) removed by filtration, washed with water and ethyl acetate, and recrystallised from chloroform. Yield: 0.335 g, 56%. IR vmax/cm−1 3092, 1730, 1678, 1601. 1H NMR δH (DMSO-d6) 3.76 (3H, s, Me), 5.49 (2H, s, CH2Ar), 6.89-6.92 (1H, m, ArH), 7.00-7.02 (1H, m, ArH), 7.28-7.32 (1H, s, ArH), 7.70 (1H, br s, NH), 7.82 (1H, br s, NH), 8.84 (1H, s, 6-H). δC (DMSO-d6) 52.2, 55.6, 113.7, 114.0, 120.4, 129.5, 130.1, 131.4, 134.9, 137.6, 139.7, 159.9, 162.0. Found 301.1091. Calc for (M+H): 301.1049. Found C, 51.3; H 3.9; N 27.8. Calc. for C13H12N6O3C, 52.0; H, 4.0; N, 28.0%. The reaction was quenched by the addition of ice the solid product (off-white) removed by filtration washed with water and ethyl acetate recrystallised from chloroform

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

实验步骤: 1.1 3.3 g of tert-butyl 3,5-diaminoindazole-1-carboxylate (13.3 mmol) and 2.0 g of 1-isocyanatomethyl-3-methoxybenzene (12.3 mmol) are stirred at RT for 24 hours in 40 ml of dichloromethane. The reaction mixture is washed with water, the organic phase is separated off, dried and evaporated. Purification of the residue by column chromatography (eluent ethyl acetate) gives 3.5 g of tert-butyl-3-amino-5-[3-(3-methoxybenzyl)ureido]indazole-1-carboxylate (64%); MS-FAB (M+H+)=412. The reaction mixture is washed with water the organic phase is separated off dried evaporated Purification of the residue by column chromatography (eluent ethyl acetate)