5-甲基-2,3-二氢呋喃

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 mixture of 2-methyl-4,5-dihydrofuran and 2-mercaptoacetic acid in THF are treated with a catalytic amount of para-toluene sulfonic acid according to the procedure in Example I.A.2. After removal of the solvent, S-(2-methyl-tetrahydrofuran-2-yl)mercaptoacetic acid is obtained. Alternatively, mercaptosuccinic acid is reacted with 2-methyl-4,5-dihydrofuran and then converted to a mercaptosuccinic anhydride derivative by a dehydrating agent such as dicyclohexyl carbodiimide. After removal of the solvent

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

实验步骤: A mixture of 2-methyl-4,5-dihydrofuran and 2-mercaptoacetic acid in THF are treated with a catalytic amount of para-toluene sulfonic acid according to the procedure in Example I.A.2. After removal of the solvent, S-(2-methyl-tetrahydrofuran-2-yl) mercaptoacetic acid is obtained. Alternatively, mercaptosuccinic acid is reacted with 2-methyl-4,5-dihydrofuran and then converted to a mercaptosuccinic anhydride derivative by a dehydrating agent such as dicyclohexyl carbodiimide. After removal of the solvent

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

实验步骤: A mixture of 2-methyl-4,5-dihydrofuran and 2-mercaptoacetic acid in THF are treated with a catalytic amount of para-toluene sulfonic acid according to the procedure in Example I.A.2. After removal of the solvent, S-(2-methyl-tetrahydrofuran-2-yl) mercaptoacetic acid is obtained. Alternatively, mercaptosuccinic acid is reacted with 2-methyl-4,5-dihydrofuran and then converted to a mercaptosuccinic anhydride derivative by a dehydrating agent such as dicyclohexyl carbodiimide. After removal of the solvent

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

实验步骤: A solution of mercaptoacetic acid (10 mmol) in 5 mL of dichloromethane containing p-toluenesulfonic acid mono-hydrate (100 mg) is cooled with stirring to -10° to -25° C. 2-Methyl-4,5-dihydrofuran (10 mmol) in 10 mL of dichloromethane is added dropwise to the cold solution while the temperature is maintained between -10° C. to -25° C. Then 5 mL of phosphate buffer is added and the solution is allowed to come to room temperature. The mixture is poured into a 30 mL of ethyl acetate and 10 mL of water. Organic layer is separated and the aqueous layer is extracted with ethyl acetate. The combined ethyl acetate layer is dried and evaporated to give 26 as a colorless oil. is cooled is maintained between -10° C. to -25° C to come to room temperature Organic layer is separated the aqueous layer is extracted with ethyl acetate The combined ethyl acetate layer is dried evaporated

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

实验步骤: A solution of mercaptoacetic acid (10 mmol) in 5 mL of dichloromethane containing p-toluenesulfonic acid mono-hydrate (100 mg) is cooled with stirring to -10° to -25° C. 2-Methyl-4,5-dihydrofuran (10 mmol) in 10 mL of dichloromethane is added dropwise to the cold solution while the temperature is maintained between -10° C. to -25° C. Then 5 mL of phosphate buffer is added and the solution is allowed to come to room temperature. The mixture is poured into a 30 mL of ethyl acetate and 10 mL of water. Organic layer is separated and the aqueous layer is extracted with ethyl acetate. The combined ethyl acetate layer is dried and evaporated to give 26 as a colorless oil. is cooled is maintained between -10° C. to -25° C to come to room temperature Organic layer is separated the aqueous layer is extracted with ethyl acetate The combined ethyl acetate layer is dried evaporated

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

实验步骤: A solution of mercaptoacetic acid (10 mmol) in 5 mL of dichloromethane containing p-toluenesulfonic acid mono-hydrate (100 mg) is cooled with stirring to -10° to -25° C. 2-Methyl-4,5-dihydrofuran (10 mmol) in 10 mL of dichloromethane is added dropwise to the cold solution while the temperature is maintained between -10° C. to -25° C. Then 5 mL of phosphate buffer is added and the solution is allowed to come to room temperature. The mixture is poured into a 30 mL of ethyl acetate and 10 mL of water. Organic layer is separated and the aqueous layer is extracted with ethyl acetate. The combined ethyl acetate layer is dried and evaporated to give 26 as a colorless oil. is cooled is maintained between -10° C. to -25° C to come to room temperature Organic layer is separated the aqueous layer is extracted with ethyl acetate The combined ethyl acetate layer is dried evaporated

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 mixture of 2-methyl-4,5-dihydrofuran and 2-mercaptoacetic acid in THF are treated with a catalytic amount of para-toluene sulfonic acid according to the procedure in Example I.A.2. After removal of the solvent, S-(2-methyl-tetrahydrofuran-2-yl) mercaptoacetic acid is obtained. Alternatively, mercaptosuccinic acid is reacted with 2-methyl-4,5-dihydrofuran and then converted to a mercaptosuccinic anhydride derivative by a dehydrating agent such as dicyclohexyl carbodiimide. After removal of the solvent

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

实验步骤: A solution of mercaptoacetic acid (10 mmol) in 5 mL of dichloromethane containing p-toluenesulfonic acid mono-hydrate (100 mg) is cooled with stirring to -10° to -25° C. 2-Methyl-4,5-dihydrofuran (10 mmol) in 10 mL of dichloromethane is added dropwise to the cold solution while the temperature is maintained between -10° C. to -25° C. Then 5 mL of phosphate buffer is added and the solution is allowed to come to room temperature. The mixture is poured into a 30 mL of ethyl acetate and 10 mL of water. Organic layer is separated and the aqueous layer is extracted with ethyl acetate. The combined ethyl acetate layer is dried and evaporated to give 26 as a colorless oil. is cooled is maintained between -10° C. to -25° C to come to room temperature Organic layer is separated the aqueous layer is extracted with ethyl acetate The combined ethyl acetate layer is dried evaporated

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

实验步骤: A solution of mercaptoacetic acid (10 mmol) in 5 mL of dichloromethane containing p-toluenesulfonic acid mono-hydrate (100 mg) is cooled with stirring to -10° to -25° C. 2-Methyl-4,5-dihydrofuran (10 mmol) in 10 mL of dichloromethane is added dropwise to the cold solution while the temperature is maintained between -10° C. to -25° C. Then 5 mL of phosphate buffer is added and the solution is allowed to come to room temperature. The mixture is poured into a 30 mL of ethyl acetate and 10 mL of water. Organic layer is separated and the aqueous layer is extracted with ethyl acetate. The combined ethyl acetate layer is dried and evaporated to give 26 as a colorless oil. is cooled is maintained between -10° C. to -25° C to come to room temperature Organic layer is separated the aqueous layer is extracted with ethyl acetate The combined ethyl acetate layer is dried evaporated

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

实验步骤: A mixture of 2-methyl-4,5-dihydrofuran and 2-mercaptoacetic acid in THF are treated with a catalytic amount of para-toluene sulfonic acid according to the procedure in Example I.A.2. After removal of the solvent, S-(2-methyl-tetrahydrofuran-2-yl)mercaptoacetic acid is obtained. Alternatively, mercaptosuccinic acid is reacted with 2-methyl-4,5-dihydrofuran and then converted to a mercaptosuccinic anhydride derivative by a dehydrating agent such as dicyclohexyl carbodiimide. After removal of the solvent