4-phenylbutanethioamide

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

Procedure: To a solution of 2-bromo-1-(4-fluorophenyl)-2-(4-methylthiophenyl)ethanone (Example 1, step 3) (0.100 g, 0.295 mmol) in ethanol (3 mL) in a 10 mL round bottom flask was added 4-phenylthiobutyramide from step 1 (0.055 g, 0.310 mmol) and the mixture heated to reflux overnight. The reaction was cooled to room temperature, diluted with ethyl acetate (50 mL), washed with Na2CO3 (10% solution), brine, dried over Na2SO4, filtered and concentrated in vacuo. The crude thiazole was flash chromatographed (9:1, hexane:ethyl acetate) yielding 4-(4-fluorophenyl)-5-(4-methylthiophenyl)-2-(3-phenylpropyl)thiazole (0.118 g, 95%) as crystalline solid: mp 62°-63° C.; 1HNMR (CDCl3) 300 mHz 7.49 (d of d, J=5.52 and 8.85, 2H), 7.33-7.14 (m, 9H), 6.98 (t, J=8.85, 2H), 3.05 (t, J=7.74, 2 H), 2.82 (t, J=7.74 Hz, 2H), 2.49 (s, 3H), 2.18 (m, 2 H); MS (FAB) m/z 420 (MH+). the mixture heated to reflux overnight washed with Na2CO3 (10% solution), brine dried over Na2SO4 filtered concentrated in vacuo chromatographed (9:1, hexane:ethyl acetate)

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

Procedure: To a solution of 4-phenylbutyramide (0.373 g, 2.28 mmol) in toluene (15 mL) was added Lawesson's reagent (0.461 g, 1.14 mmol). The reaction was refluxed overnight, cooled to room temperature and concentrated yielding an orange oil. Flash chromatography of this oil (1:1 hexane:methylene chloride with 1% acetic acid) yielded 4-phenylthiobutyramide (0.184 g) as a white solid: 1HNMR (DMSO d6 ) 400 mHz 9.33 (s, 1 H), 9.13 (s, 1 H), 7.29-7.23 (m, 2 H), 7.20-7.15 (m, 3 H), 2.56 (t, J=7.58 Hz, 2 H), 2.50-2.42 (m, 2 H), 2.00-1.85 (m, 2 H). The reaction was refluxed overnight concentrated yielding an orange oil