1,5-diphenylpentan-3-ol

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 2-(bromoethyl)benzene (1.73 g; 9.33 mmol) in diethylether (10 mL) was added to a stirred slurry of magnesium turnings (250 mg; 10.18 mmol) in 5 mL of ether. The reaction was initiated with a heat gun, and after the addition was complete the mixture was heated on an oil bath for 30 min. 3-Phenyl-1-propanal (1.25 g; 9.33 mmol) was added in 10 mL of ether, and reflux was continued for 1 hr. The reaction was cooled and quenched with saturated ammonium chloride, extracted into 2× ethyl acetate, and the combined organic portions were dried and concentrated. Chromatographic purification on a silica gel column (10% ethyl acetate in hexane) delivered 1.42 g(63%) of the dipehnyl alcohol, 1H NMR (300 MHz, CDCl3): δ 1.84(m,4H); 2.61-2.76(m,4H); 3.65(m,1H); 7.19-7.29(m,10H). after the addition was heated on an oil bath for 30 min reflux The reaction was cooled quenched with saturated ammonium chloride extracted into 2× ethyl acetate the combined organic portions were dried concentrated Chromatographic purification on a silica gel column (10% ethyl acetate in hexane)

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

Procedure: Using the procedure of Example 51 but replacing 1,5-diphenyl-3-pentanol with the resultant compound of Example 4 gave, after silica gel chromatography using 10% ethyl acetate in hexane, 80 mg (49%) of the desired compound (Rf 0.42, 20% ethyl acetate in hexane). 1H NMR (CDCl3) δ3.44 (s, 3H), 4.18 (dd, J=10, 6 Hz, 2H), 4.22 (dd, J=15, 6 Hz, 2H), 4.33 (pentet, J=6 Hz, 1H), 4.85 (s, 2H), 6.9-7.0 (m, 6H), 7.25-7.35 (m, 4H). Mass spectrum (M +NH4)+ =306. gave

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

Procedure: Using the procedure of Example 51 but replacing 1,5-diphenyl-3-pentanol with the resultant compound of Example 15 gave, after silica gel chromatography using 15% ethyl acetate in hexane, 44 mg (31%) of the desired compound (Rf 0.27, 20% ethyl acetate in hexane). 1H NMR (CDCl3) δ3.21 (dd, J=15, 6 Hz, 2H), 3.26 (dd, J=15, 6 Hz, 2H), 3.40 (s, 3H), 3.91 (pentet, J=6 Hz, 1H), 4.68 (s, 2H), 7.15-7.35 (m, 10H). Mass spectrum (M +NH4)+ =338. gave

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

Procedure: A solution of 101 mg (0.42 mmol) of 1,5-diphenyl-3-pentanol, 0.18 ml (1.0 mmol) of ethyldiisopropylamine, and 0.063 ml (0.84 mmol) of chloromethyl methyl ether in 1 ml of dichloromethane was allowed to stand for 16 h. The resulting solution was taken up in ethyl acetate, washed sequentially with 10% aqueous citric acid, water, and saturated sodium bicarbonate, dried over Na2SO4, and concentrated in vacuo. Flash chromatography using 10% ethyl acetate in hexane gave 109 mg (92%) of the desired compound (Rf 0.51, 25% ethyl acetate in hexane) as an oil. 1H NMR (CDCl3) δ1.88 (m, 4H), 2.70 (m, 4H), 3.44 (s, 3H), 3.64 (pentet, J=6 Hz, 1H), 4.70 (s, 2H), 7.15-7.3 (m, 10H). Mass spectrum (M+NH4)+ =302. washed sequentially with 10% aqueous citric acid, water, and saturated sodium bicarbonate dried over Na2SO4 concentrated in vacuo

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

Procedure: A solution of 101 mg (0.42 mmol) of 1,5-diphenyl-3-pentanol, 0.18 ml (1.0 mmol) of ethyldiisopropylamine, and 0.063 ml (0.84 mmol) of chloromethyl methyl ether in 1 ml of dichloromethane was allowed to stand for 16 h. The resulting solution was taken up in ethyl acetate, washed sequentially with 10% aqueous citric acid, water, and saturated sodium bicarbonate, dried over Na2SO4, and concentrated in vacuo. Flash chromatography using 10% ethyl acetate in hexane gave 109 mg (92%) of the desired compound (Rf 0.51, 25% ethyl acetate in hexane) as an oil. 1H NMR (CDCl3) δ1.88 (m, 4H), 2.70 (m, 4H), 3.44 (s, 3H), 3.64 (pentet, J=6 Hz, 1H), 4.70 (s, 2H), 7.15-7.3 (m, 10H). Mass spectrum (M+NH4)+ =302. washed sequentially with 10% aqueous citric acid, water, and saturated sodium bicarbonate dried over Na2SO4 concentrated in vacuo

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

Procedure: A mixture of 1.00 g (4.27 mmol) of dibenzylidene acetone and 0.15 g of 10% palladium on carbon in 150 ml of methyl cellusolve was shaken under 4 atm. of hydrogen for 2 h. The solution was filtered and concentrated in vacuo. Flash chromatography using 10-20% ethyl acetate in hexane gave 0.60 g (59%) of 1,5-diphenyl-3-pentanone (Rf 0.43, 20% ethyl acetate in hexane) as a colorless oil and 0.29 g (28%) of 1,5-diphenyl-3-pentanol (Rf 0.36) as a white solid, m.p. 43°-45° C. 1,5-Diphenyl-3-pentanone: 1H NMR (CDCl3) δ2.71 (t, J=7 Hz, 4H), 2.89 (t, J=7 Hz, 4H), 7.1-7.3 (m, 10H). Mass spectrum (M+NH4)+ =256. The solution was filtered concentrated in vacuo

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

Procedure: A solution of 2-(bromoethyl)benzene (1.73 g; 9.33 mmol) in diethylether (10 mL) was added to a stirred slurry of magnesium turnings (250 mg; 10.18 mmol) in 5 mL of ether. The reaction was initiated with a heat gun, and after the addition was complete the mixture was heated on an oil bath for 30 minutes. 3-Phenyl-1-propanal (1.25 g; 9.33 mmol) was added in 10 mL of ether, and reflux was continued for 1 hour. The reaction was cooled and quenched with saturated ammonium chloride, extracted into 2x ethyl acetate, and the combined organic portions were dried and concentrated. Chromatographic purification on a silica gel column (10% ethyl acetate in hexane) delivered 1.42 g (63%) of the diphenyl alcohol, 1H NMR (300 MHz, CDCl3): δ 1.84 (m, 4H); 2.61-2.76 (m,4H); 3.65 (m, 1H); 7.19-7.29 (m, 10H). after the addition was heated on an oil bath for 30 minutes reflux The reaction was cooled quenched with saturated ammonium chloride extracted into 2x ethyl acetate the combined organic portions were dried concentrated Chromatographic purification on a silica gel column (10% ethyl acetate in hexane)

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

Procedure: A solution of 2-(bromoethyl)benzene (1.73 g; 9.33 mmol) in diethylether (10 mL) was added to a stirred slurry of magnesium turnings (250 mg; 10.18 mmol) in 5 mL of ether. The reaction was initiated with a heat gun, and after the addition was complete the mixture was heated on an oil bath for 30 minutes. 3-Phenyl-1-propanal (1.25 g; 9.33 mmol) was added in 10 mL of ether, and reflux was continued for 1 hour. The reaction was cooled and quenched with saturated ammonium chloride, extracted into 2× ethyl acetate, and the combined organic portions were dried and concentrated. Chromatographic purification on a silica gel column (10% ethyl acetate in hexane) delivered 1.42 g (63%) of the diphenyl alcohol, 1H NMR (300 MHz, CDCl3): δ1.84 (m, 4H); 2.61-2.76 (m,4H); 3.65 (m, 1H); 7.19-7.29 (m, 10H). after the addition was heated on an oil bath for 30 minutes reflux The reaction was cooled quenched with saturated ammonium chloride extracted into 2× ethyl acetate the combined organic portions were dried concentrated Chromatographic purification on a silica gel column (10% ethyl acetate in hexane)

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

Procedure: Using the procedure of Example 51 but replacing 1,5-diphenyl-3-pentanol with the resultant compound of Example 4 gave, after silica gel chromatography using 10% ethyl acetate in hexane, 80 mg (49%) of the desired compound (Rf 0.42, 20% ethyl acetate in hexane). 1H NMR (CDCl3) δ 3 44 (s, 3H), 4.18 (dd, J=10, 6 Hz, 2H), 4.22 (dd, J=15, 6 Hz, 2H), 4.33 (pentet, J=6 Hz, 1H), 4.85 (s, 2H), 6.9-7.0 (m, 6H), 7.25-7.35 (m, 4H). Mass spectrum (M+NH4)+ =306. gave

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

Procedure: Using the procedure of Example 51 but replacing 1,5-diphenyl-3-pentanol with the resultant compound of Example 4 gave, after silica gel chromatography using 10% ethyl acetate in hexane, 80 mg (49%) of the desired compound (Rf 0.42, 20% ethyl acetate in hexane). 1H NMR (CDCl3) δ 3 44 (s, 3H), 4.18 (dd, J=10, 6 Hz, 2H), 4.22 (dd, J=15, 6 Hz, 2H), 4.33 (pentet, J=6 Hz, 1H), 4.85 (s, 2H), 6.9-7.0 (m, 6H), 7.25-7.35 (m, 4H). Mass spectrum (M+NH4)+ =306. gave

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

Procedure: Using the procedure of Example 51 but 1,5-diphenyl-3-pentanol with the resultant compound of Example 15 gave, after silica gel chromatography using 15% ethyl acetate in hexane, 44 mg (31%) of the desired compound (Rf 0.27, 20% ethyl acetate in hexane). 1H NMR (CDCl3) δ 3.21 (dd, J=15, 6 Hz, 2H), 3.26 (dd, J=15, 6 Hz, 2H), 3.40 (s, 3H), 3.91 (pentet, J=6 Hz, 1H), 4.68 (s, 2H), 7.15-7.35 (m, 10H). Mass spectrum (M +NH4)+ =338. gave