N,N-diethyl-3-fluorobenzamide

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

Conditions: temp:80.01; pressure:0.00; stir:

Conditions: temp:60.01; pressure:0.00; stir:

Conditions: temp:50.01; pressure:0.00; stir:

Conditions: temp:50.01; pressure:0.00; stir:

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

Procedure: A mixture of N,N-diethyl-3-fluorobenzamide (4.69 g, 24 mmol) (cf Mills, et al., "Directed Ortho Metalation of N,N-Diethylbenzamides. Silicon Protection of Ortho Sites and the o-Methyl Group," J. of Organic Chemistry 54: 4372-4385, 1989), Lawesson's reagent (6.47 g, 16 mmol) and xylenes (150 mL) was refluxed overnight, then was concentrated and kugelrohr distilled (105-110° C. at 0.25 torr) to yield 4.8 g N,N-diethyl-3-(fluoro)thiobenzamide as a yellow oil, a 95% yield. was concentrated kugelrohr distilled (105-110° C. at 0.25 torr)

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1.3M s-BuLi in cyclohexane (7.7 mL, 0.01 mol) was added dropwise to THF (30 mL) and TMEDA (1.28 g, 0.011 mol) cooled to -78° C. under nitrogen with stirring. To this mixture was added 0.0097 mol of N,N-diethyl-3-fluorobenzamide (prepared from 3-fluorobenzoic acid and diethylamine according to the procedures of the examples of b and f) dissolved in a minimum amount of THF dropwise. The mixture was stirred for 10 min and injected with t-butyldimethylsilylchloride (3.01 g, 0.02 mol). The reaction mixture was stirred and warmed to RT overnight. 25% citric acid (15 mL) was added and the mixture was extracted three times with ether. The ether extracts were combined and washed twice with water, dried (MgSO4), concentrated, and purified by RC eluting with 7:15 ethyl acetate/hexanes. The title compound was recovered as a tan solid in 81% yield. m.p. 50-51° C. The mixture was stirred for 10 min The reaction mixture was stirred warmed to RT overnight the mixture was extracted three times with ether washed twice with water dried (MgSO4) concentrated purified by RC eluting with 7:15 ethyl acetate/hexanes The title compound was recovered as a tan solid in 81% yield

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

Procedure: A mixture of N,N-diethyl-3-fluorobenzamide (4.69 g, 24 mmol) (cf Mills, et al., "Directed Ortho Metalation of N,N-Diethylbenzamides. Silicon Protection of Ortho Sites and the o-Methyl Group," J. of Organic Chemistry 54: 4372-4385, 1989), Lawesson's reagent (6.47 g, 16 mmol) and xylenes (150 mL) was refluxed overnight, then was concentrated and kugelrohr distilled (105°-110° C. at 0.25 torr) to yield 4.8 g N,N-diethyl-3-(fluoro)thiobenzamide as a yellow oil, a 95% yield. was concentrated kugelrohr distilled (105°-110° C. at 0.25 torr)

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1.3M s-BuLi in cyclohexane (7.7 mL, 0.01 mol) was added dropwise to THF (30 mL) and TMEDA (1.28 g, 0.011 mol) cooled to -78° C. under nitrogen with stirring. To this mixture was added 0.0097 mol of N,N-diethyl-3-fluorobenzamide (prepared from 3-fluorobenzoic acid and diethylamine according to the procedures of the examples of b and f) dissolved in a minimum amount of THF dropwise. The mixture was stirred for 10 min and injected with t-butyldimethylsilylchloride (3.01 g, 0.02 mol). The reaction mixture was stirred and warmed to RT overnight. 25% citric acid (15 mL) was added and the mixture was extracted three times with ether. The ether extracts were combined and washed twice with water, dried (MgSO4), concentrated, and purified by RC eluting with 7:15 ethyl acetate/hexanes. The title compound was recovered as a tan solid in 81% yield. m.p. 50°-51° C. The mixture was stirred for 10 min The reaction mixture was stirred warmed to RT overnight the mixture was extracted three times with ether washed twice with water dried (MgSO4) concentrated purified by RC eluting with 7:15 ethyl acetate/hexanes The title compound was recovered as a tan solid in 81% yield

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

Procedure: A mixture of N,N-diethyl-3-fluorobenzamide (4.69 g, 24 mmol) (cf Mills, et al., "Directed Ortho Metalation of N,N-Diethylbenzamides. Silicon Protection of Ortho Sites and the o-Methyl Group," J. of Organic Chemistry 54: 4372-4385, 1989), Lawesson's reagent (6.47 g, 16 mmol) and xylenes (150 mL) was refluxed overnight, then was concentrated and kugelrohr distilled (105-110° C. at 0.25 torr) to yield 4.8 g N,N-diethyl-3-(fluoro)thiobenzamide as a yellow oil, a 95% yield. was concentrated kugelrohr distilled (105-110° C. at 0.25 torr)

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1.3M s-BuLi in cyclohexane (7.7 mL, 0.01 mol) was added dropwise to THF (30 mL) and TMEDA (1.28 g, 0.011 mol) cooled to -78° C. under nitrogen with stirring. To this mixture was added 0.0097 mol of N,N-diethyl-3-fluorobenzamide (prepared from 3-fluorobenzoic acid and diethylamine according to the procedures of the examples of b and f) dissolved in a minimum amount of THF dropwise. The mixture was stirred for 10 min and injected with t-butyldimethylsilylchloride (3.01 g, 0.02 mol). The reaction mixture was stirred and warmed to RT overnight. 25% citric acid (15 mL) was added and the mixture was extracted three times with ether. The ether extracts were combined and washed twice with water, dried (MgSO4), concentrated, and purified by RC eluting with 7:15 ethyl acetate/hexanes. The title compound was recovered as a tan solid in 81% yield. m.p. 50-51° C. The mixture was stirred for 10 min The reaction mixture was stirred warmed to RT overnight the mixture was extracted three times with ether washed twice with water dried (MgSO4) concentrated purified by RC eluting with 7:15 ethyl acetate/hexanes The title compound was recovered as a tan solid in 81% yield

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

Procedure: A mixture of N,N-diethyl-3-fluorobenzamide (4.69 g, 24 mmol) (of Mills, et al., "Directed Ortho Metalation of N,N-Diethylbenzamides. Silicon Protection of Ortho Sites and the o-Methyl Group," J. of Organic Chemistry 54: 4372-4385, 1989), Lawesson's reagent (6.47 g, 16 mmol) and xylenes (150 mL) was refluxed overnight, then was concentrated and kugelrohr distilled (105°-110° C. at 0.25 torr) to yield 4.8 g N,N-diethyl-3-(fluoro)thiobenzamide as a yellow oil, a 95% yield. was concentrated kugelrohr distilled (105°-110° C. at 0.25 torr)