1,3-difluoro-2-iodo-5-propylbenzene

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:

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

Procedure: A mixture of 2 g of 1-propyl-3,5-difluoro-4-iodobenzene, 0.626 g of 2-methyl-3-butyn-2-ol, 0.164 g of tetrakis(triphenylphosphine)palladium(0), 10 ml of triethylamine and 0.054 g of copper(l) iodide was stirred at 90° for 2 hours. Then, the cooled reaction mixture was partitioned between water and ether, the ether phase was washed several times with water, dried over magnesium sulphate, filtered over Celite and evaporated on a rotary evaporator. The residue was then chromatographed on 75 g of silica gel (eluent: 10% ethyl acetate in hexane) and again evaporated. There were obtained 1.5 g of 4-(4-propyl-2,6-difluorophenyl)-2-methylbutyn-2-ol as a yellow liquid. Then, the cooled reaction mixture was partitioned between water and ether the ether phase was washed several times with water dried over magnesium sulphate filtered over Celite evaporated on a rotary evaporator The residue was then chromatographed on 75 g of silica gel (eluent: 10% ethyl acetate in hexane) again evaporated

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

Procedure: A mixture of 2 g of 1-propyl-3,5-difluoro-4-iodobenzene, 0.626 g of 2-methyl-3-butyn-2-ol, 0.164 g of tetrakis(triphenylphosphine)palladium(0), 10 ml of triethylamine and 0.054 g of copper(l) iodide was stirred at 90° for 2 hours. Then, the cooled reaction mixture was partitioned between water and ether, the ether phase was washed several times with water, dried over magnesium sulphate, filtered over Celite and evaporated on a rotary evaporator. The residue was then chromatographed on 75 g of silica gel (eluent: 10% ethyl acetate in hexane) and again evaporated. There were obtained 1.5 g of 4-(4-propyl-2,6-difluorophenyl)-2-methylbutyn-2-ol as a yellow liquid. Then, the cooled reaction mixture was partitioned between water and ether the ether phase was washed several times with water dried over magnesium sulphate filtered over Celite evaporated on a rotary evaporator The residue was then chromatographed on 75 g of silica gel (eluent: 10% ethyl acetate in hexane) again evaporated

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

Procedure: 22 ml of a 1.6N butyllithium solution in hexane were added dropwise during 30 min. to a solution of 5 g of 1-propyl-3,5-difluorobenzene in 50 ml of dry tetrahydrofuran at -70° C. and left to react at -70° C. for 1 hour. Then, a solution of 8.95 g of iodine in 20 ml of dry tetrahydrofuran was added dropwise at -60° within 10 minutes and the mixture was gradually warmed to room temperature within a further 30 minutes. The resulting yellow solution was then treated with 40 ml of a 10 percent aqueous sodium bicarbonate solution and extracted with ether. The ether solution was washed with saturated sodium chloride solution and several times with water, dried over magnesium sulphate, filtered and concentrated. Chromatography of the residue over 200 g of silica gel with hexane gave 1-propyl-3,5-difluoro-4-iodobenzene as a colourless liquid. left to react at -70° C. for 1 hour extracted with ether The ether solution was washed with saturated sodium chloride solution and several times with water dried over magnesium sulphate filtered concentrated

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

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

Procedure: 0.6 mol of lithium diisopropylamide is added at 0° C. to a mixture of 0.5 mol of 4'-propyl-2',6',3,5-tetrafluorobiphenyl (prepared from 4-propyl-2,6-difluoroiodobenzene and 3,5-difluorophenylboronic acid analogously to Example 23C). 0.5 mol of trimethyl borate and 500 ml of THF, and the mixture is stirred for two hours.

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

Procedure: 0.6 mol of lithium diisopropylamide is added at 0° C. to a mixture of 0.5 mol of 4'-propyl-2',6',3,5-tetrafluorobiphenyl (prepared from 4-propyl-2,6-difluoroiodobenzene and 3,5-difluorophenylboronic acid analogously to Example 23C). 0.5 mol of trimethyl borate and 500 ml of THF, and the mixture is stirred for two hours.

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 0.65 g of 1-propyl-3,5-difluoro-4-iodobenzene (prepared according to Example 1a), 0.56 g of trans-4-[trans-4-(3-butenyl)cyclohexyl]cyclohexylacetylene, 0.053 g of tetrakis(triphenylphosphine)palladium (0), 0.009 g of copper(I) iodide and 6 ml of triethylamine was heated to 90° C. for 17 hrs. The reaction mixture was cooled, partioned between water and ether, the organic phase was separated and the aqueous phase was extracted several times with ether. The combined organic phases were dried over magnesium sulphate, filtered and evaporated. chromatography of the residue on silica gel with hexane and two-fold crystallization, firstly from hexane and then from isopropanol, gave 640 mg of 1-{trans-4-[trans-4-(3-butenyl)cyclohexyl]cyclohexylethynyl}-2,6-difluoro-4-propylbenzene, m.p. (C/N) 48.5° C., cl.p. (N/I) 189.8° C. The reaction mixture was cooled the organic phase was separated the aqueous phase was extracted several times with ether The combined organic phases were dried over magnesium sulphate filtered evaporated chromatography of the residue on silica gel with hexane and two-fold crystallization

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

Procedure: A mixture of 2 g of 1-propyl-3,5-difluoro-4-iodobenzene, 0.626 g of 2-methyl-3-butyn-2-ol, 0.164 g of tetrakis(triphenylphosphine)palladium(0), 10 ml of triethylamine and 0.054 g of copper(l) iodide was stirred at 90° for 2 hours. Then, the cooled reaction mixture was partitioned between water and ether, the ether phase was washed several times with water, dried over magnesium sulphate, filtered over Celite and evaporated on a rotary evaporator. The residue was then chromatographed on 75 g of silica gel (eluent: 10% ethyl acetate in hexane) and again evaporated. There were obtained 1.5 g of 4-(4-propyl-2,6-difluorophenyl)-2-methylbutyn-2-ol as a yellow liquid. Then, the cooled reaction mixture was partitioned between water and ether the ether phase was washed several times with water dried over magnesium sulphate filtered over Celite evaporated on a rotary evaporator The residue was then chromatographed on 75 g of silica gel (eluent: 10% ethyl acetate in hexane) again evaporated