乙基 N-(氰甲基)氨基甲酸酯

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: A stream of H2S is passed into a mixture of 27.5 g of ethoxycarbonylaminoacetonitrile (210 mmol), pyridine (21ml, 210 mmol) and triethylamine (14.5 ml, 105 mmol) according to the procedure of Example 23. After stirring for 4 hours at room temperature and washing with water, a beige precipitate is obtained which is filtered off to give 6.6 g of ethoxycarbonylaminothioacetamide, which is a beige powder melting at 116° C. washing with water a beige precipitate is obtained which is filtered off

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

实验步骤: Aminoacetonitrile sulfate (H2NCH2CN.1/2H2SO4, 121.5 g, 1.156mole) was dissolved in water (230.9 g) and the solution was cooled to 0° to 5° C. and adjusted to pH 5 to 7 by the addition of a small amount of 30% aqueous sodium hydroxide solution. Ethyl chloroformate (108.5 g, 1.00 mole) and 30% aqueous sodium hydroxide solution were concurrently added dropwise with stirring and keeping pH at 5 to 7 at 0° to 5° C. over 2 hours and the mixture was stirred at the same temperature for additional 2 hours while keeping the same pH by dropping, if necessary, 30% aqueous sodium hydroxide solution. The total amount of 30% aqueous sodium hydroxide solution was 294.3 g. The reaction mixture was extracted three times with toluene (485 ml). The toluene layer was dried over anhydrous magnesium sulfate, toluene was evaporated and the residue was cooled to room temperature to give crystals (124.7 g, 0.968 mole) of ethyl N-cyanomethylcarbamate. the solution was cooled to 0° to 5° C. at 0° to 5° C. over 2 hours the mixture was stirred at the same temperature for additional 2 hours The reaction mixture was extracted three times with toluene (485 ml) The toluene layer was dried over anhydrous magnesium sulfate, toluene was evaporated

反应条件: temp:0.00; pressure:0.00; stir: