4-tert-Butyl-2-chlorophenol

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

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

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

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

Procedure: To a solution of 4-tert-butyl-2-chlorophenol (47.0 g, 0.25 mol) in dichloromethane (200 mL) was added Et3N (50.5 g, 0.50 mol), DMAP (1 g) and methyl chloroformate (35.4 g, 0.38 mol) at 0° C. The reaction was allowed to warm to room temperature and stirred for additional 30 min. The reaction mixture was washed with H2O and the organic layer was dried over Na2SO4 and concentrated to give 4-tert-butyl-2-chlorophenyl methyl carbonate (56.6 g, 92%), which was used directly in the next step. The reaction mixture was washed with H2O the organic layer was dried over Na2SO4 concentrated

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

Procedure: To a solution of 4-tert-butyl-phenol (40.0 g, 0.27 mol) and SO2Cl2 (37.5 g, 0.28 mol) in CH2Cl2 was added MeOH (9.0 g, 0.28 mol) at 0° C. After addition was complete, the mixture was stirred overnight at room temperature and then water (200 mL) was added. The resulting solution was extracted with ethyl acetate. The combined organic layers were dried over anhydrous Na2SO4, filtered and concentrated under vacuum. The residue was purified by column chromatography (Pet. Ether/EtOAc, 50:1) to give 4-tert-butyl-2-chloro-phenol (47.0 g, 95%). After addition The resulting solution was extracted with ethyl acetate The combined organic layers were dried over anhydrous Na2SO4 filtered concentrated under vacuum The residue was purified by column chromatography (Pet. Ether/EtOAc, 50:1)

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

Procedure: To a solution of 4-tert-butyl-2-chlorophenol (47.0 g, 0.25 mol) in dichloromethane (200 mL) was added Et3N (50.5 g, 0.50 mol), DMAP (1 g) and methyl chloroformate (35.4 g, 0.38 mol) at 0° C. The reaction was allowed to warm to room temperature and stirred for additional 30 min. The reaction mixture was washed with H2O and the organic layer was dried over Na2SO4 and concentrated to give 4-tert-butyl-2-chlorophenyl methyl carbonate (56.6 g, 92%), which was used directly in the next step. The reaction mixture was washed with H2O the organic layer was dried over Na2SO4 concentrated

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

Procedure: To a solution of 4-tert-butyl-phenol (40.0 g, 0.27 mol) and SO2Cl2 (37.5 g, 0.28 mol) in CH2Cl2 was added MeOH (9.0 g, 0.28 mol) at 0° C. After addition was complete, the mixture was stirred overnight at room temperature and then water (200 mL) was added. The resulting solution was extracted with ethyl acetate. The combined organic layers were dried over anhydrous Na2SO4, filtered and concentrated under vacuum. The residue was purified by column chromatography (Pet. Ether/EtOAc, 50:1) to give 4-tert-butyl-2-chloro-phenol (47.0 g, 95%). After addition The resulting solution was extracted with ethyl acetate The combined organic layers were dried over anhydrous Na2SO4 filtered concentrated under vacuum The residue was purified by column chromatography (Pet. Ether/EtOAc, 50:1)

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

Procedure: 4-t-Butylphenol (2.76 g, 18.4 mmol) was dissolved in dichloromethane (25 ml). Sulfuryl chloride (1.6 ml, 9.9 mmol) was added dropwise to the obtained solution, and they were stirred at room temperature for 3 days and then concentrated under reduced pressure. After the purification by the silica gel column chromatography, 2-chloro-4-t-butylphenol (yield: 2.71 g, 80%) was obtained. concentrated under reduced pressure After the purification by the silica gel column chromatography

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

Procedure: 1.50 g (10 mmol) of 4-tert.-butyl phenol were dissolved in 40 ml acetonitrile. 1.34 g (10 mmol) of NCS were added and the reaction mixture was stirred at rt over night. The reaction mixture was heated for 1.5 h to reflux. Then additional 134 mg (1 mmol) of NCS were added and the reaction mixture was heated to reflux for 2 h. The solvent was evaporated and the residue was stirred with diethyl ether for 15 min. The solid was filtered off and the filtrate was evaporated. The residue was purified by column chromatography (100 silica gel, DCM) to yield 1.49 g (81%) of 4-tert.-butyl-2-chloro-phenol as a colorless viscous oil. 1H NMR (DMSO-d6, 300 MHz): δ 9.85 (s, 1H), 7.26 (s, 1H), 7.14 (d, 2H), 6.88 (d, 2H), 1.22 (s, 9H). The reaction mixture was heated for 1.5 h to reflux the reaction mixture was heated to reflux for 2 h The solvent was evaporated the residue was stirred with diethyl ether for 15 min The solid was filtered off the filtrate was evaporated The residue was purified by column chromatography (100 silica gel, DCM)

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

Procedure: 4-tert-Butyl-phenol (2.64 g, 17.5 mmol) was dissolved in 1M solution of SO2Cl2 in DCM (17.5 mL, 17.5 mmol) and MeOH (0.71 mL, 17.5 mmol) was added. The reaction was stirred at rt and monitored for progression. Additional 1M SO2Cl2/DCM (10 mL) and MeOH (0.36 mL) were added. The reaction mixture was concentrated in vacuo to yield the target compound. Calculated mass=186. Observed mass=187 was added The reaction mixture was concentrated in vacuo to yield the target compound

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

Procedure: To a solution of 4-tert-butyl-2-chlorophenol (47.0 g, 0.25 mol) in dichloromethane (200 mL) was added Et3N (50.5 g, 0.50 mol), DMAP (1 g) and methyl chloroformate (35.4 g, 0.38 mol) at 0° C. The reaction was allowed to warm to room temperature and stirred for additional 30 min. The reaction mixture was washed with H2O and the organic layer was dried over Na2SO4 and concentrated to give 4-tert-butyl-2-chlorophenyl methyl carbonate (56.6 g, 92%), which was used directly in the next step. The reaction mixture was washed with H2O the organic layer was dried over Na2SO4 concentrated

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

Procedure: To a solution of 4-tert-butyl-2-chlorophenol (47.0 g, 0.25 mol) in dichloromethane (200 mL) was added Et3N (50.5 g, 0.50 mol), DMAP (1 g) and methyl chloroformate (35.4 g, 0.38 mol) at 0° C. The reaction was allowed to warm to room temperature and stirred for additional 30 min. The reaction mixture was washed with H2O and the organic layer was dried over Na2SO4 and concentrated to give 4-tert-butyl-2-chlorophenyl methyl carbonate (56.6 g, 92%), which was used directly in the next step. The reaction mixture was washed with H2O the organic layer was dried over Na2SO4 concentrated