1,1,1-trifluoro-4-phenylbut-3-yn-2-one

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

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

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

Procedure: Phenylacetylene (10.8 mL, 0.098 mole) was added into a 3-Neck round bottom flask under an atmosphere of Nitrogen. THF (100 mL) was added and the reaction was stirred and cooled to 0° C. 2.5 M n-butyllithium in hexane (36 mL, 0.089 mole) was added via syringe at 0° C. over 30 min. The reaction was stirred at 0° C. for 30 minutes. Ethyl trifluoroacetate (5.31 mL, 0.045 mole) was added via syringe at −60 to −50° C. over 10 minutes. The reaction was stirred at −70° C. for 1 h. Ammonium chloride 28% w/w in water (60 mL) was added and the mixture was extracted with Ether (2×50 mL). The organic phase was dried over magnesium sulfate, filtered and concentrated in vacuo, and then allowed to stand under high vacuum for 2 h to afford an orange oil. The oil was chromatographed on silica gel with 2:1 hexanes, methylene chloride to afford the title compound as a yellow oil; 1H NMR (CDCl3, 400 MHz) δ 7.44-7.48 (tt, 2H), 7.55-7.60 (tt, 1H), 7.67-7.70 (m, 2H); 19F NMR (CDCl3, 400 MHz) δ 77.54 (s). The reaction was stirred at 0° C. for 30 minutes The reaction was stirred at −70° C. for 1 h the mixture was extracted with Ether (2×50 mL) The organic phase was dried over magnesium sulfate filtered concentrated in vacuo to afford an orange oil The oil was chromatographed on silica gel with 2:1 hexanes, methylene chloride

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

Procedure: Into a 1-Neck round-bottom flask was added 1,1,1-trifluoro-4-phenyl-but-3-yn-2-one (2.0 g, 0.01 mole), methanol (5 mL) and m-chloroaniline (0.961 mL, 0.0091 mol). The reaction was stirred. TLC (SiO2, hexanes/methylene chloride 1:1) indicated near reaction completion after 1 h. After 1.5 h the product was concentrated in vacuo to afford an orange oil, which was placed on high vacuum overnight, affording a yellow gum. The crude product was chromatographed on Silica gel with hexanes, Methylene Chloride 2:1, and place on high vacuum for 2 h to afford the title compound as a yellow gum; 1H NMR (CDCl3, 400 MHz) δ 5.74 (s, 1H), 6.67-6.69 (m, 1H), 6.85 (nm, 1H), 7.08-7.10 (m, 1H), 7.31-7.39 (m, 4H), 7.43-7.47 (tt, 1H), 12.39 (bs, 1H) After 1.5 h the product was concentrated in vacuo to afford an orange oil, which was placed on high vacuum overnight affording a yellow gum The crude product was chromatographed on Silica gel with hexanes, Methylene Chloride 2:1, and place on high vacuum for 2 h

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

Procedure: Phenylacetylene (10.8 mL, 0.098 mole) was added into a 3-Neck round bottom flask under an atmosphere of Nitrogen. THF (100 mL) was added and the reaction was stirred and cooled to 0° C. 2.5 M n-butyllithium in hexane (36 mL, 0.089 mole) was added via syringe at 0° C. over 30 min. The reaction was stirred at 0° C. for 30 minutes. Ethyl trifluoroacetate (5.31 mL, 0.045 mole) was added via syringe at −60 to −50° C. over 10 minutes. The reaction was stirred at −70° C. for 1 h. Ammonium chloride 28% w/w in water (60 mL) was added and the mixture was extracted with Ether (2×50 mL). The organic phase was dried over magnesium sulfate, filtered and concentrated in vacuo, and then allowed to stand under high vacuum for 2 h to afford an orange oil. The oil was chromatographed on silica gel with 2:1 hexanes, methylene chloride to afford the title compound as a yellow oil; 1H NMR (CDCl3, 400 MHz) δ 7.44-7.48 (tt, 2 H), 7.55-7.60 (tt, 1 H), 7.67-7.70 (m, 2 H); 19F NMR (CDCl3, 400 MHz) δ 77.54 (s). The reaction was stirred at 0° C. for 30 minutes The reaction was stirred at −70° C. for 1 h the mixture was extracted with Ether (2×50 mL) The organic phase was dried over magnesium sulfate filtered concentrated in vacuo to afford an orange oil The oil was chromatographed on silica gel with 2:1 hexanes, methylene chloride

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

Procedure: Into a 1-Neck round-bottom flask was added 1,1,1-trifluoro-4-phenyl-but-3-yn-2-one (2.0 g, 0.01 mole), methanol (5 mL) and m-chloroaniline (0.961 mL, 0.0091 mol). The reaction was stirred. TLC (SiO2, hexanes/methylene chloride 1:1) indicated near reaction completion after 1 h. After 1.5 h the product was concentrated in vacuo to afford an orange oil, which was placed on high vacuum overnight, affording a yellow gum. The crude product was chromatographed on Silica gel with hexanes, Methylene Chloride 2:1, and place on high vacuum for 2 h to afford the title compound as a yellow gum; 1H NMR (CDCl3, 400 MHz) δ 5.74 (s, 1 H), 6.67-6.69 (m, 1 H), 6.85 (m, 1 H), 7.08-7.10 (m, 1 H), 7.31-7.39 (m, 4 H), 7.43-7.47 (ft, 1 H), 12.39 (bs, 1 H). After 1.5 h the product was concentrated in vacuo to afford an orange oil, which was placed on high vacuum overnight affording a yellow gum The crude product was chromatographed on Silica gel with hexanes, Methylene Chloride 2:1, and place on high vacuum for 2 h

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

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

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

Procedure: Phenylacetylene (10.8 mL, 0.098 mole) was added into a 3-Neck round bottom flask under an atmosphere of Nitrogen. THF (100 mL) was added and the reaction was stirred and cooled to 0° C. 2.5 M n-butyllithium in hexane (36 mL, 0.089 mole) was added via syringe at 0° C. over 30 min. The reaction was stirred at 0° C. for 30 minutes. Ethyl trifluoroacetate (5.31 mL, 0.045 mole) was added via syringe at −60 to −50° C. over 10 minutes. The reaction was stirred at −70° C. for 1 h. Ammonium chloride 28% w/w in water (60 mL) was added and the mixture was extracted with Ether (2×50 mL). The organic phase was dried over magnesium sulfate, filtered and concentrated in vacuo, and then allowed to stand under high vacuum for 2 h to afford an orange oil. The oil was chromatographed on silica gel with 2:1 hexanes, methylene chloride to afford the title compound as a yellow oil; 1H NMR (CDCl3, 400 MHz) δ 7.44-7.48 (tt, 2H), 7.55-7.60 (tt, 1H), 7.67-7.70 (m, 2H); 19F NMR (CDCl3, 400 MHz) δ 77.54 (s). The reaction was stirred at 0° C. for 30 minutes The reaction was stirred at −70° C. for 1 h the mixture was extracted with Ether (2×50 mL) The organic phase was dried over magnesium sulfate filtered concentrated in vacuo to afford an orange oil The oil was chromatographed on silica gel with 2:1 hexanes, methylene chloride

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

Procedure: Phenylacetylene (10.8 mL, 0.098 mole) was added into a 3-Neck round bottom flask under an atmosphere of Nitrogen. THF (100 mL) was added and the reaction was stirred and cooled to 0° C. 2.5 M n-butyllithium in hexane (36 mL, 0.089 mole) was added via syringe at 0° C. over 30 min. The reaction was stirred at 0° C. for 30 minutes. Ethyl trifluoroacetate (5.31 mL, 0.045 mole) was added via syringe at −60 to −50° C. over 10 minutes. The reaction was stirred at −70° C. for 1 h. Ammonium chloride 28% w/w in water (60 mL) was added and the mixture was extracted with Ether (2×50 mL). The organic phase was dried over magnesium sulfate, filtered and concentrated in vacuo, and then allowed to stand under high vacuum for 2 h to afford an orange oil. The oil was chromatographed on silica gel with 2:1 hexanes, methylene chloride to afford the title compound as a yellow oil; 1H NMR (CDCl3, 400 MHz) δ 7.44-7.48 (tt, 2H), 7.55-7.60 (tt, 1H), 7.67-7.70 (m, 2H); 19F NMR (CDCl3, 400 MHz) δ 77.54 (s). The reaction was stirred at 0° C. for 30 minutes The reaction was stirred at −70° C. for 1 h the mixture was extracted with Ether (2×50 mL) The organic phase was dried over magnesium sulfate filtered concentrated in vacuo to afford an orange oil The oil was chromatographed on silica gel with 2:1 hexanes, methylene chloride

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

Procedure: Into a 1-Neck round-bottom flask was added 1,1,1-trifluoro-4-phenyl-but-3-yn-2-one (2.0 g, 0.01 mole), methanol (5 mL) and m-chloroaniline (0.961 mL, 0.0091 mol). The reaction was stirred. TLC (SiO2, hexanes/methylene chloride 1:1) indicated near reaction completion after 1 h. After 1.5 h the product was concentrated in vacuo to afford an orange oil, which was placed on high vacuum overnight, affording a yellow gum. The crude product was chromatographed on Silica gel with hexanes, Methylene Chloride 2:1, and place on high vacuum for 2 h to afford the title compound as a yellow gum; 1H NMR (CDCl3, 400 MHz) δ 5.74 (s, 1H), 6.67-6.69 (m, 1H), 6.85 (m, 1H), 7.08-7.10 (m, 1H), 7.31-7.39 (m, 4H), 7.43-7.47 (tt, 1H), 12.39 (bs, 1H) After 1.5 h the product was concentrated in vacuo to afford an orange oil, which was placed on high vacuum overnight affording a yellow gum The crude product was chromatographed on Silica gel with hexanes, Methylene Chloride 2:1, and place on high vacuum for 2 h

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

Procedure: Into a 1-Neck round-bottom flask was added 1,1,1-trifluoro-4-phenyl-but-3-yn-2-one (2.0 g, 0.01 mole), methanol (5 mL) and m-chloroaniline (0.961 mL, 0.0091 mol). The reaction was stirred. TLC (SiO2, hexanes/methylene chloride 1:1) indicated near reaction completion after 1 h. After 1.5 h the product was concentrated in vacuo to afford an orange oil, which was placed on high vacuum overnight, affording a yellow gum. The crude product was chromatographed on Silica gel with hexanes, Methylene Chloride 2:1, and place on high vacuum for 2 h to afford the title compound as a yellow gum; 1H NMR (CDCl3, 400 MHz) δ 5.74 (s, 1H), 6.67-6.69 (m, 1H), 6.85 (m, 1H), 7.08-7.10 (m, 1H), 7.31-7.39 (m, 4H), 7.43-7.47 (tt, 1H), 12.39 (bs, 1H) After 1.5 h the product was concentrated in vacuo to afford an orange oil, which was placed on high vacuum overnight affording a yellow gum The crude product was chromatographed on Silica gel with hexanes, Methylene Chloride 2:1, and place on high vacuum for 2 h