氯甲酸('±)-1,2,2,2-四氯乙酯

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:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of astaxanthin 2E (0.100 g, 0.168 mmol) in DCM (4 mL) at 0° C. was added DIPEA (0.585 mL, 3.36 mmol), and 1,2,2,2-tetrachloroethyl chloroformate (0.103 mL, 0.672 mmol). The reaction mixture was stirred at 0° C. for 2 hours, then at room temperature for 1.5 hours, at which time (D)-mannitol (0.3060 g, 1.68 mmol), DMF (3 mL), and DMAP (0.2052 g, 1.68 mmol) were added to the reaction. The reaction mixture was stirred at room temperature for 24 hours, at which time the reaction was diluted with DCM, quenched with brine (20 mL), and then extracted with DCM. The combined organic layers were concentrated to yield mannitol monocarbonate (LVII) (10.19%) HPLC retention time: 9.474 min., 10.19% (AUC); LRMS (ESI) m/z (relative intensity): 827 (M++Na) (50), 804 (M+) (25), 725 (58), 613 (100), and astaxanthin 2E (53.73%). at room temperature for 1.5 hours The reaction mixture was stirred at room temperature for 24 hours, at which time the reaction quenched with brine (20 mL) extracted with DCM The combined organic layers were concentrated

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of astaxanthin 2E (0.100 g, 0.168 mmol) in DCM (4 mL) at 0° C. was added DIPEA (0.585 mL, 3.36 mmol), and 1,2,2,2-tetrachloroethyl chloroformate (0.103 mL, 0.672 mmol). The reaction mixture was stirred at 0° C. for 2 hours, then at room temperature for 1.5 hours, at which time (D)-mannitol (0.3060 g, 1.68 mmol), DMF (3 mL), and DMAP (0.2052 g, 1.68 mmol) were added to the reaction. The reaction mixture was stirred at room temperature for 24 hours, at which time the reaction was diluted with DCM, quenched with brine (20 mL), and then extracted with DCM. The combined organic layers were concentrated to yield mannitol monocarbonate (LVII) (10.19%) HPLC retention time: 9.474 min., 10.19% (AUC); LRMS (ESI) m/z (relative intensity): 827 (M++Na) (50), 804 (M+) (25), 725 (58), 613 (100), and astaxanthin (53.73%). at room temperature for 1.5 hours The reaction mixture was stirred at room temperature for 24 hours, at which time the reaction quenched with brine (20 mL) extracted with DCM The combined organic layers were concentrated

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of astaxanthin 2E (0.100 g, 0.168 mmol) in DCM (4 mL) at 0° C. was added DIPEA (0.585 mL, 3.36 mmol), and 1,2,2,2-tetrachloroethyl chloroformate (0.103 mL, 0.672 mmol). The reaction mixture was stirred at 0° C. for 2 hours, then at room temperature for 1.5 hours, at which time (D)-mannitol (0.3060 g, 1.68 mmol), DMF (3 mL), and DMAP (0.2052 g, 1.68 mmol) were added to the reaction. The reaction mixture was stirred at room temperature for 24 hours, at which time the reaction was diluted with DCM, quenched with brine (20 mL), and then extracted with DCM. The combined organic layers were concentrated to yield mannitol monocarbonate (LVII) (10.19%) HPLC retention time: 9.474 min., 10.19% (AUC); LRMS (ESI) m/z (relative intensity): 827 (M++Na) (50), 804 (M+) (25), 725 (58), 613 (100), and astaxanthin (53.73%). at room temperature for 1.5 hours The reaction mixture was stirred at room temperature for 24 hours, at which time the reaction quenched with brine (20 mL) extracted with DCM The combined organic layers were concentrated

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

实验步骤: 34.7 ml (0.4 mmol) of methylamine (in 40% strength aqueous solution) are added dropwise to a solution maintained at 0° C. of 49.4 g (0.2 mole) of 1,2,2,2-tetrachloroethyl chloroformate in dichloromethane (150 ml). The mixture is then stirred for 2 hours at room temperature. The organic phase is washed with 2×100 ml of water and dried over magnesium sulphate. The organic phase is washed with 2×100 ml of water dried over magnesium sulphate

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

实验步骤: 34.7 ml (0.4 mmol) of methylamine (in 40% strength aqueous solution) are added dropwise to a solution maintained at 0° C. of 49.4 g (0.2 mole) of 1,2,2,2-tetrachloroethyl chloroformate in dichloromethane (150 ml). The mixture is then stirred for 2 hours at room temperature. The organic phase is washed with 2×100 ml of water and dried over magnesium sulphate. The organic phase is washed with 2×100 ml of water dried over magnesium sulphate

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of astaxanthin 2E (0.100 g, 0.168 mmol) in DCM (4 mL) at 0° C. was added DIPEA (0.585 mL, 3.36 mmol), and 1,2,2,2-tetrachloroethyl chloroformate (0.103 mL, 0.672 mmol). The reaction mixture was stirred at 0° C. for 2 hours, then at room temperature for 1.5 hours, at which time (D)-mannitol (0.3060 g, 1.68 mmol), DMF (3 mL), and DMAP (0.2052 g, 1.68 mmol) were added to the reaction. The reaction mixture was stirred at room temperature for 24 hours, at which time the reaction was diluted with DCM, quenched with brine (20 mL), and then extracted with DCM. The combined organic layers were concentrated to yield mannitol monocarbonate (LVII) (10.19%) HPLC retention time: 9.474 min., 10.19% (AUC); LRMS (ESI) m/z (relative intensity): 827 (M++Na) (50), 804 (M+) (25), 725 (58), 613 (100), and astaxanthin 2E (53.73%). at room temperature for 1.5 hours The reaction mixture was stirred at room temperature for 24 hours, at which time the reaction quenched with brine (20 mL) extracted with DCM The combined organic layers were concentrated

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of astaxanthin 2E (0.100 g, 0.168 mmol) in DCM (4 mL) at 0° C. was added DIPEA (0.585 mL, 3.36 mmol), and 1,2,2,2-tetrachloroethyl chloroformate (0.103 mL, 0.672 mmol). The reaction mixture was stirred at 0° C. for 2 hours, then at room temperature for 1.5 hours, at which time (D)-mannitol (0.3060 g, 1.68 mmol), DMF (3 mL), and DMAP (0.2052 g, 1.68 mmol) were added to the reaction. The reaction mixture was stirred at room temperature for 24 hours, at which time the reaction was diluted with DCM, quenched with brine (20 mL), and then extracted with DCM. The combined organic layers were concentrated to yield mannitol monocarbonate (LVII) (10.19%) HPLC retention time: 9.474 min., 10.19% (AUC); LRMS (ESI) m/z (relative intensity): 827 (M++Na) (50), 804 (M+) (25), 725 (58), 613 (100), and as (53.73%). at room temperature for 1.5 hours The reaction mixture was stirred at room temperature for 24 hours, at which time the reaction quenched with brine (20 mL) extracted with DCM The combined organic layers were concentrated

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of astaxanthin 2E (0.100 g, 0.168 mmol) in DCM (4 mL) at 0° C. was added DIPEA (0.585 mL, 3.36 mmol), and 1,2,2,2-tetrachloroethyl chloroformate (0.103 mL, 0.672 mmol). The reaction mixture was stirred at 0° C. for 2 hours, then at room temperature for 1.5 hours, at which time (D)-mannitol (0.3060 g, 1.68 mmol), DMF (3 mL), and DMAP (0.2052 g, 1.68 mmol) were added to the reaction. The reaction mixture was stirred at room temperature for 24 hours, at which time the reaction was diluted with DCM, quenched with brine (20 mL), and then extracted with DCM. The combined organic layers were concentrated to yield mannitol monocarbonate (LVII) (10.19%) HPLC retention time: 9.474 min., 10.19% (AUC); LRMS (ESI) m/z (relative intensity): 827 (M++Na) (50), 804 (M+) (25), 725 (58), 613 (100), and as (53.73%). at room temperature for 1.5 hours The reaction mixture was stirred at room temperature for 24 hours, at which time the reaction quenched with brine (20 mL) extracted with DCM The combined organic layers were concentrated

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

实验步骤: 34.7 ml (0.4 mmol) of methylamine (in 40% strength aqueous solution) are added dropwise to a solution maintained at 0° C. of 49.4 g (0.2 mole) of 1,2,2,2-tetrachloroethyl chloroformate in dichloromethane (150 ml). The mixture is then stirred for 2 hours at room temperature. The organic phase is washed with 2×100 ml of water and dried over magnesium sulphate. The organic phase is washed with 2×100 ml of water dried over magnesium sulphate