Carbonic acid, 1-chloroethyl 4-nitrophenyl ester

To an ice cold reaction mixture containing p-nitrophenol (1.39 g, 10 mmol) and pyridine (0.81 g, 10 mmol) in dichloromethane (60 mL) was added 1-chloroethyl chloroformate (1.2 mL, 11 mmol). The mixture was stirred at 0° C. for 30 min and then at room temperature for 1 hour. After removing the solvent under reduced pressure, the residue was dissolved in ether, washed with water, 10percent citric acid and water. The ether layer was dried over Na1-iodoethyl 4-nitrophenyl carbonateSTEP A: 1-chloroethyl 4-nitrophenyl carbonate.To a solution of 4-nitrophenol (3.0 g, 21.6 mmol) and pyridine (1.9 mL, 24 mmol) in CHSTEP A: 1-chloroethyl 4-nitrophenyl carbonateTo a solution of 4-nitrophenol (3.0 g, 21.6 mmol) and pyridine (1.9 mL, 24 mmol) cooled to 0°C, 1-chloroethyl chloroformate (2.3 mL, 21.6 mmol) was added. The reaction was stirred at room temperature for 5-6 hours, then washed with Na3/4P0Step 1: To an ice-cold solution of 4-nitrophenol (2.0 g, 15 mmol) and triethylamine (1.6 g, 16 mmol) in dichloromethane (20 ml) was added a solution of 1-chloroethyl chloroformate (2.1 g, 19 mmol) in dichloromethane, and the mixture was stirred for 15 min at 0 °C and then overnight at room temperature. The mixture was extracted with dichloromethane (50 ml), washed successively with water (50 ml), 0.5 N sodium hydroxide (50 ml), saturated aqueous sodium chloride solution (50 ml), and water (3 x 50 ml), and dried over NaFirst, place a 4-nitro phenol 10g on 250ml flask and dissolved in 100ml of methylene chloride. The reaction was cooled to 0 ~ 4 and slowly added 5.92ml of pyridine. After stirring for 10 minutes and added to 1-chloroethyl chloroformate 8.81ml slowly. Warm to room temperature and then stirred for 30 minutes and stirred overnight. After distillation under reduced pressure and the residue was dissolved in diethyl ether and washed with water, 10wtpercent citric acid solution, water order. Distilled under reduced pressure after dried over anhydrous sodium sulfate phenyl 1-chloro-ethyl-4-nitro-carbonate to give the 1.67g.To an ice cold reaction mixture containing p-nitrophenol (1.39 g, 10 mmol) and pyridine (0.81 g, 10 mmol) in dichloromethane (60 mL) was added 1-chloroethyl chloroformate (1.2 mL, 11 mmol). The mixture was stirred at 0° C. for 30 min and then at room temperature for 1 hour. After removing the solvent under reduced pressure, the residue was dissolved in ether, washed with water, 10percent citric acid and water. The ether layer was dried over Na1-iodoethyl 4-nitrophenyl carbonateSTEP A: 1-chloroethyl 4-nitrophenyl carbonate.To a solution of 4-nitrophenol (3.0 g, 21.6 mmol) and pyridine (1.9 mL, 24 mmol) in CHSTEP A: 1-chloroethyl 4-nitrophenyl carbonateTo a solution of 4-nitrophenol (3.0 g, 21.6 mmol) and pyridine (1.9 mL, 24 mmol) cooled to 0°C, 1-chloroethyl chloroformate (2.3 mL, 21.6 mmol) was added. The reaction was stirred at room temperature for 5-6 hours, then washed with Na3/4P0Step 1: To an ice-cold solution of 4-nitrophenol (2.0 g, 15 mmol) and triethylamine (1.6 g, 16 mmol) in dichloromethane (20 ml) was added a solution of 1-chloroethyl chloroformate (2.1 g, 19 mmol) in dichloromethane, and the mixture was stirred for 15 min at 0 °C and then overnight at room temperature. The mixture was extracted with dichloromethane (50 ml), washed successively with water (50 ml), 0.5 N sodium hydroxide (50 ml), saturated aqueous sodium chloride solution (50 ml), and water (3 x 50 ml), and dried over NaA mixture of A solution of 1-chloroethyl-p-nitrophenyl carbonate (57) (2.0 g, 8.14 mmol), and mercury isobutyrate (6.13 g, 16.29 mmol) in dichloromethane (10 mL) was stirred at 45 C. for 24 h. The reaction was then cooled to room temperature and diluted with hexane to precipitate mercury salts. The precipitate was filtered through a pad of Celite, and the filtrate was concentrated in vacuo to afford 2.5 g of crude product. Chromatography of the residue on silica gel, eluting with a gradient of 10% dichloromethane/hexane to 20% dichloromethane/hexane afforded 1.2 g (52%) of the title compound. 1H-NMR (CDCl3, 400 MHz): delta 1.21-1.99 (m, 6H), 1.62 (d, J=5.6 Hz, 3H), 2.61 (m, 1H), 6.84 (q, J=5.6 Hz, 1H), 7.41 (dt, J=6.8, 2.4 Hz, 2H), 8.29 (dt, J=6.8, 2.4 Hz, 2H).

Molecular Weight:245.61
XLogP3:3
Hydrogen Bond Acceptor Count:5
Rotatable Bond Count:4
Exact Mass:245.0091000
Monoisotopic Mass:245.0091000
Topological Polar Surface Area:81.4
Heavy Atom Count:16
Complexity:259
Undefined Atom Stereocenter Count:1
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes