2-(2-amino-5-chlorophenyl)-4-cyclopropyl-1,1,1-trifluorobut-3-yn-2-ol

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: To a stirred ice-cooled solution of 290 mg of 6-amino-3-chloro-α-cyclopropylethynyl-α-(trifluoromethyl)benzyl alcohol (Example 14, Part A) in 15 mL of dry ether was added 0.100 mL of dry pyridine and 228 mg of α-bromoisobutyryl chloride. After 30 min, the reaction mixture was diluted with ether, washed with water and aqueous sodium bicarbonate, dried and evaporated. The residue was dissolved in 15 mL of dry DMF, 268 mg of lithium iodide and 978 mg of cesium carbonate was added, and the resulting heterogeneous mixture was stirred at room temperature overnight. The reaction mixture was then poured onto water and etracted twice with ether. The combined extracts were washed with water and brine, dried and evaporated. Since TLC. showed the reaction had only gone halfway to completion, the crude product was redissloved in 15 mL of DMF and subjected to the same reaction conditions as above for another 24 h. After the same work-up, the crude product was purified by column chromatography over silica gel (elution with 5-15% ethyl acetate in hexanes) and then recrystallized from ethyl acetate/hexanes to give 45 mg of the title compound as colorless crystals: mp 167°; Anal. Calcd. for C18H17NO2F3Cl: C, 58.15; H, 4.62; N, 3.78. Found: C, 58.11; H, 4.59; N, 3.70. washed with water and aqueous sodium bicarbonate dried evaporated The residue was dissolved in 15 mL of dry DMF 268 mg of lithium iodide and 978 mg of cesium carbonate was added The reaction mixture was then poured onto water The combined extracts were washed with water and brine dried evaporated subjected to the same reaction conditions as above for another 24 h After the same work-up, the crude product was purified by column chromatography over silica gel (elution with 5-15% ethyl acetate in hexanes) recrystallized from ethyl acetate/hexanes

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

Procedure: A solution of 2-(2-amino-5-chlorophenyl)-4-cyclopropyl-1,1,1-trifluoro-3-butyn-2-ol (15.00 g, 0.0518 mol) and 41.98 g (0.259 mol) of 1,1'-carbonyldiimidazole in 250 mL of dry THF was stirred under argon at 55° C. for 24 hours. The solvent was removed on a rotary evaporator and the residue was partitioned between 500 mL of ethyl acetate and 400 mL of water. The layers were separated and the aqueous phase was extracted once more with ethyl acetate. The combined ethyl acetate extracts were washed with 2×200 mL of 2% aqueous HCl, saturated aqueous NaHCO3, and brine. Drying over MgSO4, filtration, and removal of the solvent in vacuo provided 16.42 g of the title compound as a solid. Recrystallization from ethyl acetatehexane afforded 12.97 g of analytically pure (±) 6-chloro-4-cyclopropylethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1-benzoxazin-2-one as a white crystals. mp: 178°-180° C. 1H-NMR (CDCl3): 0.85 (m, 2H), 0.94 (m, 2H), 1.40 (m, 1H), 6.81 (d, J=8.5 Hz, 1H), 7.37 (dd, J=2.5, 8.5 Hz, 1H), 7.49 (d, J=2.5 Hz, 1H), 8.87 (br s, 1H). The solvent was removed on a rotary evaporator the residue was partitioned between 500 mL of ethyl acetate and 400 mL of water The layers were separated the aqueous phase was extracted once more with ethyl acetate The combined ethyl acetate extracts were washed with 2×200 mL of 2% aqueous HCl, saturated aqueous NaHCO3, and brine Drying over MgSO4, filtration, and removal of the solvent in vacuo

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

Procedure: To a stirred ice-cooled solution of 290 mg of 6-amino-3-chloro-α-cyclopropylethynyl-α-(trifluoromethyl)benzyl alcohol (Example 14, Part A) in 15 mL of dry ether was added 0.100 mL of dry pyridine and 228 mg of α-bromoisobutyryl chloride. After 30 min, the reaction mixture was diluted with ether, washed with water and aqueous sodium bicarbonate, dried and evaporated. The residue was dissolved in 15 mL of dry DMF, 268 mg of lithium iodide and 978 mg of cesium carbonate was added, and the resulting heterogeneous mixture was stirred at room temperature overnight. The reaction mixture was then poured onto water and etracted twice with ether. The combined extracts were washed with water and brine, dried and evaporated. Since TLC. showed the reaction had only gone halfway to completion, the crude product was redissloved in 15 mL of DMF and subjected to the same reaction conditions as above for another 24 h. After the same work-up, the crude product was purified by column chromatography over silica gel (elution with 5-15% ethyl acetate in hexanes) and then recrystallized from ethyl acetate/hexanes to give 45 mg of the title compound as colorless crystals: mp 167°; Anal. Calcd. for C18H17NO2F3Cl: C, 58.15; H, 4.62; N, 3.78. Found: C, 58.11; H, 4.59; N, 3.70. washed with water and aqueous sodium bicarbonate dried evaporated The residue was dissolved in 15 mL of dry DMF 268 mg of lithium iodide and 978 mg of cesium carbonate was added The reaction mixture was then poured onto water The combined extracts were washed with water and brine dried evaporated subjected to the same reaction conditions as above for another 24 h After the same work-up, the crude product was purified by column chromatography over silica gel (elution with 5-15% ethyl acetate in hexanes) recrystallized from ethyl acetate/hexanes

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

Procedure: To a stirred ice-cooled solution of 290 mg of 6-amino-3-chloro-α-cyclopropylethynyl-α-(trifluoromethyl)benzyl alcohol (Example 14, Part A) in 15 mL of dry ether was added 0.100 mL of dry pyridine and 228 mg of α-bromoisobutyryl chloride. After 30 min, the reaction mixture was diluted with ether, washed with water and aqueous sodium bicarbonate, dried and evaporated. The residue was dissolved in 15 mL of dry DMF, 268 mg of lithium iodide and 978 mg of cesium carbonate was added, and the resulting heterogeneous mixture was stirred at room temperature overnight. The reaction mixture was then poured onto water and etracted twice with ether. The combined extracts were washed with water and brine, dried and evaporated. Since TLC. showed the reaction had only gone halfway to completion, the crude product was redissloved in 15 mL of DMF and subjected to the same reaction conditions as above for another 24 h. After the same work-up, the crude product was purified by column chromatography over silica gel (elution with 5-15% ethyl acetate in hexanes) and then recrystallized from ethyl acetate/hexanes to give 45 mg of the title compound as colorless crystals: mp 167°; Anal. Calcd. for C18H17NO2F3Cl: C, 58.15; H, 4.62; N, 3.78. Found: C, 58.11; H, 4.59; N, 3.70. washed with water and aqueous sodium bicarbonate dried evaporated The residue was dissolved in 15 mL of dry DMF 268 mg of lithium iodide and 978 mg of cesium carbonate was added The reaction mixture was then poured onto water The combined extracts were washed with water and brine dried evaporated subjected to the same reaction conditions as above for another 24 h After the same work-up, the crude product was purified by column chromatography over silica gel (elution with 5-15% ethyl acetate in hexanes) recrystallized from ethyl acetate/hexanes

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-(2-amino-5-chlorophenyl)-4-cyclopropyl-1,1,1-trifluoro-3-butyn-2-ol (15.00 g, 0.0518 mol) and 41.98 g (0.259 mol) of 1,1'-carbonyldiimidazole in 250 mL of dry THF was stirred under argon at 55° C. for 24 hours. The solvent was removed on a rotary evaporator and the residue was partitioned between 500 mL of ethyl acetate and 400 mL of water. The layers were separated and the aqueous phase was extracted once more with ethyl acetate. The combined ethyl acetate extracts were washed with 2×200 mL of 2% aqueous HCl, saturated aqueous NaHCO3, and brine. Drying over MgSO4, filtration, and removal of the solvent in vacuo provided 16.42 g of the title compound as a solid. Recrystallization from ethyl acetate-hexane afforded 12.97 g of analytically pure (±) 6-chloro-4-cyclopropylethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1-benzoxazin-2-one as a white crystals. mp: 178°-180° C. 1H-NMR (CDCl3): 0.85 (m, 2H), 0.94 (m, 2H), 1.40 (m, 1H), 6.81 (d, J=8.5 Hz, 1H), 7.37 (dd, J=2.5, 8.5 Hz, 1H), 7.49 (d, J=2.5 Hz, 1H), 8.87 (br s, 1H). The solvent was removed on a rotary evaporator the residue was partitioned between 500 mL of ethyl acetate and 400 mL of water The layers were separated the aqueous phase was extracted once more with ethyl acetate The combined ethyl acetate extracts were washed with 2×200 mL of 2% aqueous HCl, saturated aqueous NaHCO3, and brine Drying over MgSO4, filtration, and removal of the solvent in vacuo

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

Procedure: To a stirred ice-cooled solution of 290 mg of 6-amino-3-chloro-α-cyclopropylethynyl-α-(trifluoromethyl)benzyl alcohol (Example 14, Part A) in 15 mL of dry ether was added 0.100 mL of dry pyridine and 228 mg of α-bromoisobutyryl chloride. After 30 min, the reaction mixture was diluted with ether, washed with water and aqueous sodium bicarbonate, dried and evaporated. The residue was dissolved in 15 mL of dry DMF, 268 mg of lithium iodide and 978 mg of cesium carbonate was added, and the resulting heterogeneous mixture was stirred at room temperature overnight. The reaction mixture was then poured onto water and etracted twice with ether. The combined extracts were washed with water and brine, dried and evaporated. Since TLC showed the reaction had only gone halfway to completion, the crude product was redissloved in 15 mL of DMF and subjected to the same reaction conditions as above for another 24 h. After the same work-up, the crude product was purified by column chromatography over silica gel (elution with 5-15% ethyl acetate in hexanes) and then recrystallized from ethyl acetate/hexanes to give 45 mg of the title compound as colorless crystals: mp 167°; Anal. Calcd. for C18H17NO2F3Cl: C, 58.15; H, 4.62; N, 3.78. Found: C, 58.11; H, 4.59; N, 3.70. washed with water and aqueous sodium bicarbonate dried evaporated The residue was dissolved in 15 mL of dry DMF 268 mg of lithium iodide and 978 mg of cesium carbonate was added The reaction mixture was then poured onto water The combined extracts were washed with water and brine dried evaporated subjected to the same reaction conditions as above for another 24 h After the same work-up, the crude product was purified by column chromatography over silica gel (elution with 5-15% ethyl acetate in hexanes) recrystallized from ethyl acetate/hexanes

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

Procedure: To a stirred ice-cooled solution of 290 mg of 6-amino-3-chloro-α-cyclopropylethynyl-α-(trifluoromethyl)benzyl alcohol (Example 14, Part A) in 15 mL of dry ether was added 0.100 mL of dry pyridine and 228 mg of α-bromoisobutyryl chloride. After 30 min, the reaction mixture was diluted with ether, washed with water and aqueous sodium bicarbonate, dried and evaporated. The residue was dissolved in 15 mL of dry DMF, 268 mg of lithium iodide and 978 mg of cesium carbonate was added, and the resulting heterogeneous mixture was stirred at room temperature overnight. The reaction mixture was then poured onto water and etracted twice with ether. The combined extracts were washed with water and brine, dried and evaporated. Since TLC showed the reaction had only gone halfway to completion, the crude product was redissloved in 15 mL of DMF and subjected to the same reaction conditions as above for another 24 h. After the same work-up, the crude product was purified by column chromatography over silica gel (elution with 5-15% ethyl acetate in hexanes) and then recrystallized from ethyl acetate/hexanes to give 45 mg of the title compound as colorless crystals: mp 167°; Anal. Calcd. for C18H17NO2F3Cl: C, 58.15; H, 4.62; N, 3.78. Found: C, 58.11; H, 4.59; N, 3.70. washed with water and aqueous sodium bicarbonate dried evaporated The residue was dissolved in 15 mL of dry DMF 268 mg of lithium iodide and 978 mg of cesium carbonate was added The reaction mixture was then poured onto water The combined extracts were washed with water and brine dried evaporated subjected to the same reaction conditions as above for another 24 h After the same work-up, the crude product was purified by column chromatography over silica gel (elution with 5-15% ethyl acetate in hexanes) recrystallized from ethyl acetate/hexanes

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

Procedure: A solution of 2-(2-amino-5-chlorophenyl)-4-cyclopropyl-1,1,1-trifluoro-3-butyn-2-ol (15.00 g, 0.0518 mol) and 41.98 g (0.259 mol) of 1,1'-carbonyldiimidazole in 250 mL of dry THF was stirred under argon at 55° C. for 24 hours. The solvent was removed on a rotary evaporator and the residue was partitioned between 500 mL of ethyl acetate and 400 mL of water. The layers were separated and the aqueous phase was extracted once more with ethyl acetate. The combined ethyl acetate extracts were washed with 2×200 mL of 2% aqueous HCl, saturated aqueous NaHCO3, and brine. Drying over MgSO4, filtration, and removal of the solvent in vacuo provided 16.42 g of the title compound as a solid. Recrystallization from ethyl acetatehexane afforded 12.97 g of analytically pure (+) 6-chloro-4-cyclopropylethynyl-4-trifluoromethyl-1,4-dihydro-2H -3,1-benzoxazin-2-one as a white crystals. mp: 178°-180° C. 1H-NMR (CDCl3): 0.85 (m, 2H), 0.94 (m, 2H), 1.40 (m, 1H), 6.81 (d, J=8.5 Hz, 1H), 7.37 (dd, J=2.5, 8.5 Hz, 1H), 7.49 (d, J=2.5 Hz, 1H), 8.87 (br s, 1H). The solvent was removed on a rotary evaporator the residue was partitioned between 500 mL of ethyl acetate and 400 mL of water The layers were separated the aqueous phase was extracted once more with ethyl acetate The combined ethyl acetate extracts were washed with 2×200 mL of 2% aqueous HCl, saturated aqueous NaHCO3, and brine Drying over MgSO4, filtration, and removal of the solvent in vacuo

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

Procedure: A solution of 2-(2-amino-5-chlorophenyl)-4-cyclopropyl-1,1,1-trifluoro-3-butyn-2-ol (15.00 g, 0.0518 mol) and 41.98 g (0.259 mol) of 1,1'-carbonyldiimidazole in 250 mL of dry THF was stirred under argon at 55° C. for 24 hours. The solvent was removed on a rotary evaporator and the residue was partitioned between 500 mL of ethyl acetate and 400 mL of water. The layers were separated and the aqueous phase was extracted once more with ethyl acetate. The combined ethyl acetate extracts were washed with 2×200 mL of 2% aqueous HCl, saturated aqueous NaHCO3, and brine. Drying over MgSO4, filtration, and removal of the solvent in vacuo provided 16.42 g of the title compound as a solid. Recrystallization from ethyl acetate-hexane afforded 12.97 g of analytically pure (±)6-chloro-4-cyclo-propylethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1-benzoxazin-2-one as a white crystals. mp: 178°-180° C. 1H-NMR (CDCl3): 0.85 (m, 2H), 0.94 (m, 2H), 1.40 (m, 1H), 6.81 (d, J=8.5 Hz, 1H), 7.37 (dd, J=2.5, 8.5 Hz, 1H), 7.49 (d, J=2.5 Hz, 1H), 8.87 (br s, 1H). The solvent was removed on a rotary evaporator the residue was partitioned between 500 mL of ethyl acetate and 400 mL of water The layers were separated the aqueous phase was extracted once more with ethyl acetate The combined ethyl acetate extracts were washed with 2×200 mL of 2% aqueous HCl, saturated aqueous NaHCO3, and brine Drying over MgSO4, filtration, and removal of the solvent in vacuo