methyl 1,3-thiazolidine-2-carboxylate

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 2-Thiazolidinecarboxylic acid methyl ester (C.A. 53, 12, 281) (4.4 g.) and 3-hydroxybenzotriazole (4.0 g.) are dissolved in dichloromethane (40 ml.) and the solution is stirred and chilled in an ice bath. Dicyclohexylcarbodiimide (6.2 g.) dissolved in dichloromethane (15 ml.) is added followed immediately by a solution of 3-acetylthio-2-methylpropanoic acid (4.9 g.) in dichloromethane (5 ml.). After fifteen minutes stirring in the ice bath, and sixteen hours at room temperature, the precipitate is filtered off and the filtrate is washed neutral. The organic layer is dried and concentrated to dryness in vacuo to give 3-(3-acetylthio-2-methylpropanoyl)-2-thiazolidinecarboxylic acid methyl ester. chilled in an ice bath is added the precipitate is filtered off the filtrate is washed neutral The organic layer is dried concentrated to dryness in vacuo

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of (±)-thiazolidine-2-carboxylic acid (1.58 g, 11.9 mmol) and chlorotrimethylsilane (5.1 g, 47 mmol) in methanol (22 mL) was heated at reflux for 5 hours, cooled, and concentrated giving a solid (2.19 g, 100%). was heated at reflux for 5 hours cooled concentrated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of (±)-thiazolidine-2-carboxylic acid (1.58 g, 11.9 mmol) and chlorotrimethylsilane (5.1 g, 47 mmol) in methanol (22 mL) was heated at reflux for 5 hours, cooled, and concentrated giving a solid (2.19 g, 100%). was heated at reflux for 5 hours cooled concentrated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 2-Thiazolidinecarboxylic acid methyl ester (C.A. 53, 12,281d) (4.4 g.) and 3-hydroxybenzotriazole (4.0 g.) are dissolved in dichloromethane (40 ml.) and the solution is stirred and chilled in an ice bath. Dicyclohexylcarbodiimide (6.2 g.) dissolved in dichloromethane (15 ml.) is added followed immediately by a solution of 3-acetylthio-2-methylpropanoic acid (4.9 g.) in dichloromethane (5 ml.). After fifteen minutes stirring in the ice bath, and sixteen hours at room temperature, the precipitate is filtered off and the filtrate is washed neutral. The organic layer is dried and concentrated to dryness in vacuo to give 3-(3-acetylthio-2-methylpropanoyl)-2-thiazolidinecarboxylic acid methyl ester. chilled in an ice bath is added the precipitate is filtered off the filtrate is washed neutral The organic layer is dried concentrated to dryness in vacuo

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 2-Thiazolidinecarboxylic acid methyl ester (C.A. 53, 12,281d) (4.4 g.) and 3-hydroxybenzotriazole (4.0 g.) are dissolved in dichloromethane (40 ml.) and the solution is stirred and chilled in an ice bath. Dicyclohexylcarbodiimide (6.2 g.) dissolved in dichloromethane (15 ml.) is added followed immediately by a solution of 3-acetylthio-2-methylpropanoic acid (4.9 g.) in dichloromethane (5 ml.). After fifteen minutes stirring in the ice bath, and sixteen hours at room temperature, the precipitate is filtered off and the filtrate is washed neutral. The organic layer is dried and concentrated to dryness in vacuo to give 3-(3-acetylthio-2-methylpropanoyl)-2-thiazolidinecarboxylic acid methyl ester. chilled in an ice bath is added the precipitate is filtered off the filtrate is washed neutral The organic layer is dried concentrated to dryness in vacuo

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of (±)-thiazolidine-2-carboxylic acid (1.58 g, 11.9 mmol) and chlorotrimethylsilane (5.1 g, 47 mmol) in methanol (22 mL) was heated at reflux for 5 hours, cooled, and concentrated giving a solid (2.19 g, 100%). was heated at reflux for 5 hours cooled concentrated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 2-Thiazolidinecarboxylic acid methyl ester (C.A. 53, 12,281d) (4.4 l g.) and 3-hydroxybenzotriazole (4.0 g.) are dissolved in dichloromethane (40 ml.) and the solution is stirred and chilled in an ice bath. Dicyclohexylcarbodiimide (6.2 g.) dissolved in dichloromethane (15 ml.) is added followed immediately by a solution of 3-acetylthio-2-methylpropanoic acid (4.9 g.) in dichloromethane (5 ml.). After fifteen minutes stirring in the ice bath, and sixteen hours at room temperature, the precipitate is filtered off and the filtrate is washed neutral. The organic layer is dried and concentrated to dryness in vacuo to give 3-(3-acetylthio-2-methylpropanoyl)-2-thiazolidinecarboxylic acid methyl ester. chilled in an ice bath is added the precipitate is filtered off the filtrate is washed neutral The organic layer is dried concentrated to dryness in vacuo

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 2-Thiazolidinecarboxylic acid methyl ester (C.A. 53, 12, 281) (4.4 g.) and 3-hydroxybenzotriazole (4.0 g.) are dissolved in dichloromethane (40 ml.) and the solution is stirred and chilled in an ice bath. Dicyclohexylcarbodiimide (6.2 g.) dissolved in dichloromethane (15 ml.) is added followed immediately by a solution of 3-acetylthio-2-methylpropanoic acid (4.9 g.) in dichloromethane (5 ml.). After fifteen minutes stirring in the ice bath, and sixteen hours at room temperature, the precipitate is filtered off and the filtrate is washed neutral. The organic layer is dried and concentrated to dryness in vacuo to give 3-(3-acetylthio-2-methylpropanoyl)-2-thiazolidinecarboxylic acid methyl ester. chilled in an ice bath is added the precipitate is filtered off the filtrate is washed neutral The organic layer is dried concentrated to dryness in vacuo

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of (±)-thiazolidine-2-carboxylic acid (1.58 g, 11.9 mmol) and chlorotrimethylsilane (5.1 g, 47 mmol) in methanol (22 mL) was heated at reflux for 5 hours, cooled, and concentrated giving a solid (2.19 g, 100%). was heated at reflux for 5 hours cooled concentrated