3-(4-chlorophenyl)prop-2-yn-1-ol

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

Conditions: temp:70.01; pressure:0.00; stir:

Procedure: Dilution of the aliquot (2 uL) with DMSO (200 uL).

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

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

Procedure: A solution of 1-chloro-4-iodobenzene (23.9 g, 100.0 mmol) in dry tetrahydrofuran (100 mL) was degassed and copper(I)iodide (570 mg, 3.0 mmol), tetrakis(triphenylphosphine)-palladium (3.4 g, 3.0 mmol) and 1,8-diazabicyclo[5.4.0]undec-7-ene (18.2 g, 120.0 mmol) were added. The reaction solution was degassed again and propargyl alcohol (6.7 g, 120.0 mmol) was added under inert atmosphere at ambient temperature. The reaction mixture was stirred (initially under cooling with ice water) for 24 h, then treated with water (20 mL) and acidified with 2 M hydrochloric acid (20 mL). The organic phase was separated and the aqueous phase was extracted with ether (4×30 mL). The combined organic phases were dried with anhydrous magnesium sulfate and concentrated in vacuo yielding brown solid. The residue was purified by column chromatography (silica gel Fluka 60, chloroform) yielding 3-(4-chlorophenyl)prop-2-yn-1-ol. The reaction solution was degassed again The organic phase was separated the aqueous phase was extracted with ether (4×30 mL) The combined organic phases were dried with anhydrous magnesium sulfate concentrated in vacuo yielding brown solid The residue was purified by column chromatography (silica gel Fluka 60, chloroform)

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

Procedure: A solution of 1-chloro-4-iodobenzene (23.9 g, 100.0 mmol) in dry tetrahydrofuran (100 mL) was degassed and copper(I)iodide (570 mg, 3.0 mmol), tetrakis(triphenylphosphine)palladium (3.4 g, 3.0 mmol) and 1,8-diazabicyclo[5.4.0]undec-7-ene (18.2 g, 120.0 mmol) were added. The reaction solution was degassed again and propargyl alcohol (6.7 g, 120.0 mmol) was added under inert atmosphere at ambient temperature. The reaction mixture was stirred (initially under cooling with ice water) for 24 h, then treated with water (20 mL) and acidified with 2 M hydrochloric acid (20 mL). The organic phase was separated and the aqueous phase was extracted with ether (4×30 mL). The combined organic phases were dried with anhydrous magnesium sulfate and concentrated in vacuo yielding brown solid. The residue was purified by column chromatography (silica gel Fluka 60, chloroform) yielding 3-(4-chlorophenyl)prop-2-yn-1-ol. The reaction solution was degassed again The organic phase was separated the aqueous phase was extracted with ether (4×30 mL) The combined organic phases were dried with anhydrous magnesium sulfate concentrated in vacuo yielding brown solid The residue was purified by column chromatography (silica gel Fluka 60, chloroform)

Conditions: temp:40.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 6 g of 1-chloro-4-iodo-benzene, 1.8 ml of propargyl alcohol and 5.2 ml of triethylamine in 30 ml of chloroform is placed under a nitrogen atmosphere. 208 mg of bis(triphenylphosphine)palladium(II) dichloride and 98 mg of copper(I) iodide are added thereto. The reaction mixture is stirred for one hour at 40° C. 300 ml of hot n-hexane are then added. The n-hexane phase is decanted off. The residue is again digested with 200 ml of hot n-hexane, and the n-hexane phase is decanted off. The n-hexane phases are concentrated and the residue is subjected to flash chromatography on silica gel with ethyl acetate/n-hexane (1:4), yielding 3-(4-chloro-phenyl)-2-propyn-1-ol, which can be recrystallised from n-hexane, m.p. 78-80° C. The n-hexane phase is decanted off the n-hexane phase is decanted off The n-hexane phases are concentrated

Conditions: temp:-15.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of 3-(4-chloro-phenyl)-prop-2-yn-1-ol (3.3 g) and toluene-4-sulfonyl chloride (3.7 g) in diethyl ether (100 ml) which is pre-cooled to −15° C. is added powdered potassium hydroxide (2.8 g) in small portions during 10 minutes. The reaction mixture is stirred at 0° C. during 90 minutes. Then water (200 ml) is added and the mixture is extracted with diethyl ether (2×100 ml) and washed with brine (50 ml). The organic layers are collected, dried (Na2SO4) and evaporated. Toluene-4-sulfonic acid 3-(4-chloro-phenyl)-prop-2-ynyl ester is obtained. the mixture is extracted with diethyl ether (2×100 ml) washed with brine (50 ml) The organic layers are collected dried (Na2SO4) evaporated

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

Procedure: A solution of 1-chloro-4-iodobenzene (23.9 g, 100.0 mmol) in dry tetrahydrofuran (100 mL) was degassed and copper(I) iodide (570 mg, 3.0 mmol), tetrakis(triphenylphosphine)-palladium (3.4 g, 3.0 mmol) and 1,8-diazabicyclo[5.4.0]undec-7-ene (18.2 g, 120.0 mmol) were added. The reaction solution was degassed again and propargyl alcohol (6.7 g, 120.0 mmol) was added under inert atmosphere at ambient temperature. The reaction mixture was stirred (initially under cooling with ice water) for 24 h, then treated with water (20 mL) and acidified with 2 M hydrochloric acid (20 mL). The organic phase was separated and the aqueous phase was extracted with ether (4×30 mL). The combined organic phases were dried with anhydrous magnesium sulfate and concentrated in vacuo yielding brown solid. The residue was purified by column chromatography (silica gel Fluka 60, chloroform) yielding 3-(4-chlorophenyl)prop-2-yn-1-ol. The reaction solution was degassed again The organic phase was separated the aqueous phase was extracted with ether (4×30 mL) The combined organic phases were dried with anhydrous magnesium sulfate concentrated in vacuo yielding brown solid The residue was purified by column chromatography (silica gel Fluka 60, chloroform)

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

Procedure: A solution of 1-chloro-4-iodobenzene (23.9 g, 100.0 mmol) in dry tetrahydrofuran (100 mL) was degassed and copper(I) iodide (570 mg, 3.0 mmol), tetrakis(triphenylphosphine)palladium (3.4 g, 3.0 mmol) and 1,8-diazabicyclo[5.4.0]undec-7-ene (18.2 g, 120.0 mmol) were added. The reaction solution was degassed again and propargyl alcohol (6.7 g, 120.0 mmol) was added under inert atmosphere at ambient temperature. The reaction mixture was stirred (initially under cooling with ice water) for 24 h, then treated with water (20 mL) and acidified with 2 M hydrochloric acid (20 mL). The organic phase was separated and the aqueous phase was extracted with ether (4×30 mL). The combined organic phases were dried with anhydrous magnesium sulfate and concentrated in vacuo yielding brown solid. The residue was purified by column chromatography (silica gel Fluka 60, chloroform) yielding 3-(4-chlorophenyl)prop-2-yn-1-ol. The reaction solution was degassed again The organic phase was separated the aqueous phase was extracted with ether (4×30 mL) The combined organic phases were dried with anhydrous magnesium sulfate concentrated in vacuo yielding brown solid The residue was purified by column chromatography (silica gel Fluka 60, chloroform)

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

Procedure: A solution of 1-chloro-4-iodobenzene (23.9 g, 100.0 mmol) in dry tetrahydrofuran (100 mL) was degassed and copper(I) iodide (570 mg, 3.0 mmol), tetrakis(triphenylphosphine)palladium (3.4 g, 3.0 mmol) and 1,8-diazabicyclo[5.4.0]undec-7-ene (18.2 g, 120.0 mmol) were added. The reaction solution was degassed again and propargyl alcohol (6.7 g, 120.0 mmol) was added under inert atmosphere at ambient temperature. The reaction mixture was stirred (initially under cooling with ice water) for 24 h, then treated with water (20 mL) and acidified with 2 M hydrochloric acid (20 mL). The organic phase was separated and the aqueous phase was extracted with ether (4×30 mL). The combined organic phases were dried with anhydrous magnesium sulfate and concentrated in vacuo yielding brown solid. The residue was purified by column chromatography (silica gel Fluka 60, chloroform) yielding 3-(4-chlorophenyl)prop-2-yn-1-ol. The reaction solution was degassed again The organic phase was separated the aqueous phase was extracted with ether (4×30 mL) The combined organic phases were dried with anhydrous magnesium sulfate concentrated in vacuo yielding brown solid The residue was purified by column chromatography (silica gel Fluka 60, chloroform)

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

Procedure: A suspension of p-iodochlorobenzene [formula (VII), 7.15 g, 30.0 mmol], propargyl alcohol (1.75 mL, 30 mmol), dichlorobis(triphenylphosphine)palladium (II) (0.21 g, 0.3 mmol), copper (I) iodide (29 mg, 0.15 mmol) and diethylamine (50 mL) was stirred under a N2 atmosphere at room temperature and dissolution occurred within 20 min. After 5 h, the diethylamine was removed, and the crude product was partitioned between water and ether. The ether phase was dried (brine), concentrated and flash chromatographed (4:1 petroleum ether: ethyl acetate) to provide 3-(4-chlorophenyl)-prop-2-yn-ol (compound of formula VIII, 4.09 g, 82%). This compound of formula (VIII) (3.47 g, 20.83 mmol) was suspended in dry ether (12 mL) and pyridine (0.42 mL) was added. The reaction mixture was cooled in an ice bath and a solution of phosphorus tribromide (1.0 mL, 10.42 mmol) in dry ether (6 mL) was added dropwise over a 15 min period. The reaction mixture was then stirred at room temperature for 2.5 h, cooled in an ice bath and crushed ice was added. The reaction mixture was added to water (200 mL) and extracted with ether (200 mL). The ether phase was washed with water, sat. aqueous NaHCO3 and brine. The extract was concentrated and flash chromatographed (9:1 petroleum ether:ethyl acetate) to provide the product as a white solid (3.38 g, 86%): mp 41°-43 ° C.; NMR (CDCl3): δ 7.37 (d, J=8.7 Hz, 2H, ArH), 7.27 (d, J=8.7 Hz, 2H, ArH), 4.16 (s, 2H, CH2). The reaction mixture was cooled in an ice bath cooled in an ice bath crushed ice was added extracted with ether (200 mL) The ether phase was washed with water, sat. aqueous NaHCO3 and brine The extract was concentrated flash chromatographed (9:1 petroleum ether:ethyl acetate)

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

Procedure: A suspension of p-iodochlorobenzene [formula (VII), 7.15 g, 30.0 mmol], propargyl alcohol (1.75 mL, 30 mmol), dichlorobis(triphenylphosphine)palladium (II) (0.21 g, 0.3 mmol), copper (I) iodide (29 mg, 0.15 mmol) and diethylamine (50 mL) was stirred under a N2 atmosphere at room temperature and dissolution occurred within 20 min. After 5 h, the diethylamine was removed, and the crude product was partitioned between water and ether. The ether phase was dried (brine), concentrated and flash chromatographed (4:1 petroleum ether: ethyl acetate) to provide 3-(4-chlorophenyl)-prop-2-yn-ol (compound of formula VIII, 4.09 g, 82%). This compound of formula (VIII) (3.47 g, 20.83 mmol) was suspended in dry ether (12 mL) and pyridine (0.42 mL) was added. The reaction mixture was cooled in an ice bath and a solution of phosphorus tribromide (1.0 mL, 10.42 mmol) in dry ether (6 mL) was added dropwise over a 15 min period. The reaction mixture was then stirred at room temperature for 2.5 h, cooled in an ice bath and crushed ice was added. The reaction mixture was added to water (200 mL) and extracted with ether (200 mL). The ether phase was washed with water, sat. aqueous NaHCO3 and brine. The extract was concentrated and flash chromatographed (9:1 petroleum ether:ethyl acetate) to provide the product as a white solid (3.38 g, 86%): mp 41°-43 ° C.; NMR (CDCl3): δ 7.37 (d, J=8.7 Hz, 2H, ArH), 7.27 (d, J=8.7 Hz, 2H, ArH), 4.16 (s, 2H, CH2). dissolution After 5 h the diethylamine was removed the crude product was partitioned between water and ether The ether phase was dried (brine) concentrated flash chromatographed (4:1 petroleum ether: ethyl acetate)