4-chloro-1-phenylbutan-1-one

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:

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:

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

Procedure: A mixture of 4-chlorobutyrophenone (447 mg, 2.45 mmol), 4-benzamidopiperidine (500 mg, 2.45 mmol) and K2CO3 (338 mg, 2.45 mmol) was heated up in boiling water bath for 1 hour. The reaction mixture was portioned between water and CHCl3. The organic layer was separated and dried over Na2SO4. After filtration and removal of solvent, the residue was purified by chromatography (SiO2, MeOH:CHCl3, 5:95). Recrystallization from AcOEt/hexane gave a white powder (78 mg, 8.2%). mp 143-144° C.; 1H NMR (CD3OD, 400 MHz) δ1.65 (dq, J1=3.16 Hz, J2=11.9 Hz, 2H), 1.90-2.00 (m, 4H), 2.18 (t, J=11.9 Hz, 2H), 2.48 (m, 2H), 3.00-3.10 (m, 4H), 3.88 (m, 1H), 7.40-8.00 (m, 10H); Mass spectrum (M+1)+ at m/z 351. was heated up for 1 hour The organic layer was separated dried over Na2SO4 After filtration and removal of solvent the residue was purified by chromatography (SiO2, MeOH:CHCl3, 5:95) Recrystallization from AcOEt/hexane

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

Procedure: A mixture of 4-chloro-1-phenyl-1-butanone (7.35 g) and sodium tetrahydroborate (3.05 g) in tetrahydrofuran (40 ml) was stirred for 36 h. 2M Hydrochloric acid was added and the mixture was extracted three times with ethyl acetate. The combined organic extracts were dried (magnesium sulphate), evaporated and purified by chromatography on silica eluting with petrol-ether to give the sub-title compound as a colourless oil (6.60 g). the mixture was extracted three times with ethyl acetate The combined organic extracts were dried (magnesium sulphate) evaporated purified by chromatography on silica eluting with petrol-ether