4-[2-(4-hydroxyphenyl)ethyl]phenol

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 4,4′-dihydroxystilbene (250 mg, 1.178 mmol) in MeOH (10 mL) and EtOAc (2 mL) containing 5% Pd—C (120 mg) was stirred under an atmosphere of hydrogen for 2 h. The catalyst was removed by filtration and the filtrate was concentrated. Chromatography purification of the crude product on silica gel (hexane-EtOAc 3:1, 2:1) provided 245 mg of 4-[4-Hydroxy-phenethyl]-phenol (97%) as a white solid. MS (ES) m/z: 213.05 (M−1). The catalyst was removed by filtration the filtrate was concentrated Chromatography purification of the crude product on silica gel (hexane-EtOAc 3:1, 2:1)

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

Procedure: A solution of 4,4′-dihydroxystilbene (250 mg, 1.178 mmol) in MeOH (10 mL) and EtOAc (2 mL) containing 5% Pd—C (120 mg) was stirred under an atmosphere of hydrogen for 2 h. The catalyst was removed by filtration and the filtrate was concentrated. Chromatography purification of the crude product on silica gel (hexane-EtOAc 3:1, 2:1) provided 245 mg of 4-[4-Hydroxy-phenethyl]-phenol (97%) as a white solid. MS (ES) m/z: 213.05 (M−1). The catalyst was removed by filtration the filtrate was concentrated Chromatography purification of the crude product on silica gel (hexane-EtOAc 3:1, 2:1)

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

Procedure: 4.53 g of magnesium shavings and a granule of iodine are treated with 150 ml of tetrahydrofuran while stirring and gassing with nitrogen. Subsequently, the mixture is treated dropwise within 20 minutes with a solution of 38.4 g of 1-bromo-4-chlorobenzene in 150 ml of tetrahydrofuran and boiled at reflux for 1.25 hours. Thereafter, the reaction mixture is cooled to 0° C. and treated dropwise at 0°-5° C. within 30 minutes with a solution of 35.7 g of 8-[2-(4-oxocyclohexyl)ethyl]-1,4-dioxaspiro[4,5]decane (prepared starting from 4,4'-(1,2-ethane-diyl)bisphenol in analogy to the synthesis of 8-(4-oxocyclohexyl)-1,4-dioxaspiro[4,5]decane described in EP-A-310,067) in 240 ml of tetrahydrofuran. The reaction mixture is stirred without cooling for a further 4 hours, then treated within 10 minutes with 240 ml of 10 percent ammonium chloride solution and extracted with diethyl ether. The ether phases are washed with water, dried over sodium sulphate, filtered and concentrated, there being obtained 1-(4-chlorophenyl)-4-[2-(1,4-dioxa-spiro[4,5]decyl)ethyl]cyclohexanol. at reflux for 1.25 hours prepared The reaction mixture is stirred without cooling for a further 4 hours extracted with diethyl ether The ether phases are washed with water dried over sodium sulphate filtered concentrated

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

Procedure: 4.53 g of magnesium shavings and a granule of iodine are treated with 150 ml of tetrahydrofuran while stirring and gassing with nitrogen. Subsequently, the mixture is treated dropwise within 20 minutes with a solution of 38.4 g of 1-bromo-4-chlorobenzene in 150 ml of tetrahydrofuran and boiled at reflux for 1.25 hours. Thereafter, the reaction mixture is cooled to 0° C. and treated dropwise at 0°-5° C. within 30 minutes with a solution of 35.7 g of 8-[2-(4-oxocyclohexyl)ethyl]-1,4-dioxaspiro[4,5]decane (prepared starting from 4,4'-(1,2-ethane-diyl)bisphenol in analogy to the synthesis of 8-(4-oxocyclohexyl)-1,4-dioxaspiro[4,5]decane described in EP-A-310,067) in 240 ml of tetrahydrofuran. The reaction mixture is stirred without cooling for a further 4 hours, then treated within 10 minutes with 240 ml of 10 percent ammonium chloride solution and extracted with diethyl ether. The ether phases are washed with water, dried over sodium sulphate, filtered and concentrated, there being obtained 1-(4-chlorophenyl)-4-[2-(1,4-dioxa-spiro[4,5]decyl)ethyl]cyclohexanol. at reflux for 1.25 hours prepared The reaction mixture is stirred without cooling for a further 4 hours extracted with diethyl ether The ether phases are washed with water dried over sodium 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: A solution of 4,4′-dihydroxystilbene (250 mg, 1.178 mmol) in MeOH (10 mL) and EtOAc (2 mL) containing 5% Pd-C (120 mg) was stirred under an atmosphere of hydrogen for 2 h. The catalyst was removed by filtration and the filtrate was concentrated. Chromatography purification of the crude product on silica gel (hexane-EtOAc 3:1, 2;1) provided 245 mg of 4-[4-Hydroxy-phenethyl]-phenol (97%) as a white solid. MS (ES) m/z: 213.05 (M−1). The catalyst was removed by filtration the filtrate was concentrated Chromatography purification of the crude product on silica gel (hexane-EtOAc 3:1, 2;1)

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

Procedure: The inherent viscosity of the polyesters determined at 30° C., in a solvent combination of 60 parts by weight phenol and 40 parts by weight sym-tetrachloroethane at a concentration of 0.5 g per dl., is at least about 0.5 and is preferably at least about 0.7. The selection of acid and diphenol components is made so that the polyester preferably has a glass transition temperature of at least 100° C., a viscosity at 320° C. determined in a capillary rheometer at a shear rate of 100 sec-1 of less than 105 poise and a melting point less than about 350° C. An especially preferred group of polyarylene esters comprises those polyesters obtained by condensation of a diphenol comprising at least 90 mol percent 1,2-bis(4-hydroxyphenyl)ethane and a dicarboxylic acid comprising at least 67 mol percent isophthalic acid. Of this preferred group, one of the more preferred combinations is obtained from 1,2-bis(4-hydroxyphenyl)ethane and isophthalic acid without additional components. The preferences are based on the availability and cost of the acid as well as on the desirable glass transition and melting points of the resulting polyesters. Since molding cycles are preferably rapid, it is desirable that a crystalline polyester crystallize in the short period during which the polymer is cooling in the mold. Thus a molding material for uses where high temperature dimensional stability is important, needs to have a rapid rate of crystallization. The glass transition temperature, the melting point and the rate of crystallization can be determined by means of differential scanning calorimetry as described in copending application Ser. No. 709,469, filed July 28, 1976, now U.S. Pat. No. 4,102,864, which methods are hereby incorporated by reference. at 320° C.

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

Procedure: A solution of 4,4′-dihydroxystilbene (250 mg, 1.178 mmol) in MeOH (10 mL) and EtOAc (2 mL) containing 5% Pd—C (120 mg) was stirred under an atmosphere of hydrogen for 2 h. The catalyst was removed by filtration and the filtrate was concentrated. Chromatography purification of the crude product on silica gel (hexane-EtOAc 3:1, 2:1) provided 245 mg of 4-[4-Hydroxy-phenethyl]-phenol (97%) as a white solid. MS (ES) m/z: 213.05 (M−1). The catalyst was removed by filtration the filtrate was concentrated Chromatography purification of the crude product on silica gel (hexane-EtOAc 3:1, 2:1)

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

Procedure: 4.53 g of magnesium shavings and a granule of iodine are treated with 150 ml of tetrahydrofuran while stirring and gassing with nitrogen. Subsequently, the mixture is treated dropwise within 20 minutes with a solution of 38.4 g of 1-bromo-4-chlorobenzene in 150 ml of tetrahydrofuran and boiled at reflux for 1.25 hours. Thereafter, the reaction mixture is cooled to 0° C. and treated dropwise at 0°-5° C. within 30 minutes with a solution of 35.7 g of 8-[2-(4-oxocyclohexyl)ethyl]-1,4-dioxaspiro[4,5]decane (prepared starting from 4,4'-(1,2-ethane-diyl)bisphenol in analogy to the synthesis of 8-(4-oxocyclohexyl)-1,4-dioxaspiro[4,5]decane described in EP-A-310,067) in 240 ml of tetrahydrofuran. The reaction mixture is stirred without cooling for a further 4 hours, then treated within 10 minutes with 240 ml of 10 percent ammonium chloride solution and extracted with diethyl ether. The ether phases are washed with water, dried over sodium sulphate, filtered and concentrated, there being obtained 1-(4-chlorophenyl)-4-[2-(1,4-dioxa-spiro[4,5]decyl)ethyl]cyclohexanol. at reflux for 1.25 hours prepared The reaction mixture is stirred without cooling for a further 4 hours extracted with diethyl ether The ether phases are washed with water dried over sodium sulphate filtered concentrated