ethyl 2,2-dimethyl-3-(phenylmethoxycarbonylamino)propanoate

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: 31 ml of 90% chloroformic acid benzyl ester are slowly added, at 0°-5° C., to 29.04 g of 3-amino-2,2-dimethylpropionic acid ethyl ester in 500 ml of ethyl acetate and 250 ml of 1M sodium hydrogen carbonate solution. The reaction mixture is stirred for 2 hours at 0°-5° C. and extracted with ethyl acetate. The organic phases are washed with saturated sodium chloride solution and then concentrated. The evaporation residue is purified by FC (1 kg of silica gel; eluant: ethyl acetate/hexane=1:3). The title compound is obtained: Rf (ethyl acetate/hexane=1:3)=0.28. extracted with ethyl acetate The organic phases are washed with saturated sodium chloride solution concentrated The evaporation residue is purified by FC (1 kg of silica gel; eluant: ethyl acetate/hexane=1:3)

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

Procedure: 31 ml of 90% chloroformic acid benzyl ester are slowly added, at 0°-5° C., to 29.04 g of 3-amino-2,2-dimethylpropionic acid ethyl ester in 500 ml of ethyl acetate and 250 ml of 1M sodium hydrogen carbonate solution. The reaction mixture is stirred for 2 hours at 0°-5° C. and extracted with ethyl acetate. The organic phases are washed with saturated sodium chloride solution and then concentrated. The evaporation residue is purified by FC (1 kg of silica gel; eluant: ethyl acetate/hexane=1:3). The title compound is obtained: Rf (ethyl acetate/hexane=1:3)=0.28. extracted with ethyl acetate The organic phases are washed with saturated sodium chloride solution concentrated The evaporation residue is purified by FC (1 kg of silica gel; eluant: ethyl acetate/hexane=1:3)

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

Procedure: 4.19 g of 3-benzyloxycarbonylamino-2,2-dimethylpropionic acid ethyl ester and 50 ml of 33% methylamine (in ethanol) are stirred for 8 days at 60° C. in a bomb tube. The reaction mixture is concentrated by evaporation and the residue is purified by FC (220 g of silica gel, dichloromethane/methanol=95:5). The title compound is obtained: Rf (dichloromethane/methanol=9:1)=0.51. The reaction mixture is concentrated by evaporation the residue is purified by FC (220 g of silica gel, dichloromethane/methanol=95:5)

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

Procedure: 4.19 g of 3-benzyloxycarbonylamino-2,2-dimethylpropionic acid ethyl ester and 50 ml of 33% methylamine (in ethanol) are stirred for 8 days at 60° C. in a bomb tube. The reaction mixture is concentrated by evaporation and the residue is purified by FC (220 g of silica gel, dichloromethane/methanol=95:5). The title compound is obtained: Rf (dichloromethane/methanol=9:1)=0.51. The reaction mixture is concentrated by evaporation the residue is purified by FC (220 g of silica gel, dichloromethane/methanol=95:5)

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

Procedure: 31 ml of 90% chloroformic acid benzyl ester are slowly added, at 0°-5° C., to 29.04 g of 3-amino-2,2-dimethylpropionic acid ethyl ester in 500 ml of ethyl acetate and 250 ml of 1M sodium hydrogen carbonate solution. The reaction mixture is stirred for 2 hours at 0°-5° C. and extracted with ethyl acetate. The organic phases are washed with saturated sodium chloride solution and then concentrated. The evaporation residue is purified by FC (1 kg of silica gel; eluant: ethyl acetate/hexane=1:3). The title compound is obtained: Rf (ethyl acetate/hexane=1:3)=0.28. extracted with ethyl acetate The organic phases are washed with saturated sodium chloride solution concentrated The evaporation residue is purified by FC (1 kg of silica gel; eluant: ethyl acetate/hexane=1:3)

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

Procedure: 31 ml of 90% chloroformic acid benzyl ester are slowly added, at 0°-5° C., to 29.04 g of 3-amino-2,2-dimethylpropionic acid ethyl ester in 500 ml of ethyl acetate and 250 ml of 1M sodium hydrogen carbonate solution. The reaction mixture is stirred for 2 hours at 0°-5° C. and extracted with ethyl acetate. The organic phases are washed with saturated sodium chloride solution and then concentrated. The evaporation residue is purified by FC (1 kg of silica gel; eluant: ethyl acetate/hexane=1:3). The title compound is obtained: Rf (ethyl acetate/hexane=1:3)=0.28. extracted with ethyl acetate The organic phases are washed with saturated sodium chloride solution concentrated The evaporation residue is purified by FC (1 kg of silica gel; eluant: ethyl acetate/hexane=1:3)

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

Procedure: 4.19 g of 3-benzyloxycarbonylamino-2,2-dimethylpropionic acid ethyl ester and 50 ml of 33% methylamine (in ethanol) are stirred for 8 days at 60° C. in a bomb tube. The reaction mixture is concentrated by evaporation and the residue is purified by FC (220 g of silica gel, dichloromethane/methanol=95:5). The title compound is obtained: Rf (dichloromethane/methanol=9:1)=0.51. The reaction mixture is concentrated by evaporation the residue is purified by FC (220 g of silica gel, dichloromethane/methanol=95:5)

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

Procedure: 31 ml of 90% chloroformic acid benzyl ester are slowly added, at 0°-5° C., to 29.04 g of 3-amino-2,2-dimethylpropionic acid ethyl ester in 500 ml of ethyl acetate and 250 ml of 1M sodium hydrogen carbonate solution. The reaction mixture is stirred for 2 hours at 0°-5° C. and extracted with ethyl acetate. The organic phases are washed with saturated sodium chloride solution and then concentrated. The evaporation residue is purified by FC (1 kg of silica gel; eluant: ethyl acetate/hexane=1:3). The title compound is obtained: Rf (ethyl acetate/hexane=1:3)=0.28. extracted with ethyl acetate The organic phases are washed with saturated sodium chloride solution concentrated The evaporation residue is purified by FC (1 kg of silica gel; eluant: ethyl acetate/hexane=1:3)

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

Procedure: 4.19 g of 3-benzyloxycarbonylamino-2,2-dimethylpropionic acid ethyl ester and 50 ml of 33% methylamine (in ethanol) are stirred for 8 days at 60° C. in a bomb tube. The reaction mixture is concentrated by evaporation and the residue is purified by FC (220 g of silica gel, dichloromethane/methanol=95:5). The title compound is obtained: Rf (dichloromethane/methanol=9:1)=0.51. The reaction mixture is concentrated by evaporation the residue is purified by FC (220 g of silica gel, dichloromethane/methanol=95:5)

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

Procedure: 4.19 g of 3-benzyloxycarbonylamino-2,2-dimethylpropionic acid ethyl ester and 50 ml of 33% methylamine (in ethanol) are stirred for 8 days at 60° C. in a bomb tube. The reaction mixture is concentrated by evaporation and the residue is purified by FC (220 g of silica gel, dichloromethane/methanol=95:5). The title compound is obtained: Rf (dichloromethane/methanol=9:1)=0.51. The reaction mixture is concentrated by evaporation the residue is purified by FC (220 g of silica gel, dichloromethane/methanol=95:5)

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

Procedure: 31 ml of 90% chloroformic acid benzyl ester are slowly added, at 0°-5° C., to 29.04 g of 3-amino-2,2-dimethylpropionic acid ethyl ester in 500 ml of ethyl acetate and 250 ml of 1M sodium hydrogen carbonate solution. The reaction mixture is stirred for 2 hours at 0°-5° C. and extracted with ethyl acetate. The organic phases are washed with saturated sodium chloride solution and then concentrated. The evaporation residue is purified by FC (1 kg of silica gel; eluant: ethyl acetate/hexane=1:3). The title compound is obtained: Rf (ethyl acetate/hexane=1:3)=0.28. extracted with ethyl acetate The organic phases are washed with saturated sodium chloride solution concentrated The evaporation residue is purified by FC (1 kg of silica gel; eluant: ethyl acetate/hexane=1:3)