3-methyl-3-phenylbutan-2-one

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To 2.1 g (10.1 mmol) of N-Methoxy-N-methyl-2-phenyl-isobutyramide in 80 ml of dry tetrahydrofuran at ambient temperature was added 6.7 ml (20.2 mmol) of 3M methymagnesium bromide in heptane, and the solution was warmed to 60° C. After 6 hours, the mixture was allowed to cool to ambient temperature and was quenched with 1M HCl. The resulting mixture was partitioned between water and ether, and the phases were separated. The ether phase was washed once each with 1M HCl and brine, dried over Na2SO4, filtered, and concentrated in vacuo to an oil. The oil was chromatographed to give the title compound as a clear oil: 1H NMR CDCl3 δ (ppm): 1.49 (s, 6H), 1.93 (s, 3H), 7.24-7.34 (m, 5H). to cool to ambient temperature was quenched with 1M HCl The resulting mixture was partitioned between water and ether the phases were separated The ether phase was washed once each with 1M HCl and brine dried over Na2SO4 filtered concentrated in vacuo to an oil The oil was chromatographed

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To 2.1 g (10.1 mmol) of N-Methoxy-N-methyl-2-phenyl-isobutyramide in 80 ml of dry tetrahydrofuran at ambient temperature was added 6.7 ml (20.2 mmol) of 3M methymagnesium bromide in heptane, and the solution was warmed to 60° C. After 6 hours, the mixture was allowed to cool to ambient temperature and was quenched with 1M HCl. The resulting mixture was partitioned between water and ether, and the phases were separated. The ether phase was washed once each with 1M HCl and brine, dried over Na2SO4, filtered, and concentrated in vacuo to an oil. The oil was chromatographed to give the title compound as a clear oil: 1H NMR CDCl3 δ (ppm): 1.49 (s, 6H), 1.93 (s, 3H), 7.24-7.34 (m, 5H). to cool to ambient temperature was quenched with 1M HCl The resulting mixture was partitioned between water and ether the phases were separated The ether phase was washed once each with 1M HCl and brine dried over Na2SO4 filtered concentrated in vacuo to an oil The oil was chromatographed

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To 2.1 g (10.1 mmol) of N-Methoxy-N-methyl-2-phenyl-isobutyramide in 80 ml of dry tetrahydrofuran at ambient temperature was added 6.7 ml (20.2 mmol) of 3M methymagnesium bromide in heptane, and the solution was warmed to 60° C. After 6 hours, the mixture was allowed to cool to ambient temperature and was quenched with 1M HCl. The resulting mixture was partitioned between water and ether, and the phases were separated. The ether phase was washed once each with 1M HCl and brine, dried over Na2SO4, filtered, and concentrated in vacuo to an oil. The oil was chromatographed to give the title compound as a clear oil: 1H NMR CDCl3 δ (ppm): 1.49 (s, 6H), 1.93 (s, 3H), 7.24-7.34 (m, 5H). to cool to ambient temperature was quenched with 1M HCl The resulting mixture was partitioned between water and ether the phases were separated The ether phase was washed once each with 1M HCl and brine dried over Na2SO4 filtered concentrated in vacuo to an oil The oil was chromatographed

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

Procedure: To a solution of N-methoxy-N-methyl-2-phenyl-isobutyramide (example 207E) (16 g, 77.2 mmoles) in THF (300 mL) cooled at −50° C. is added dropwise a 1.6M solution of MeLi in Et2O (80 mL, 131.2 mmoles). The reaction mixture is allowed to reach 0° C. and 1N HCl (130 mL, 130 mmoles) is added. The aqueous phase is extracted with Et2O. The organic phase is washed with brine, dried over MgSO4, filtered and the solvent is removed under reduced pressure to give 3-methyl-3-phenyl-butan-2-one. to reach 0° C. The aqueous phase is extracted with Et2O The organic phase is washed with brine dried over MgSO4 filtered the solvent is removed under reduced pressure

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

Procedure: To a solution of 3-methyl-3-phenyl-butan-2-one (example 207D) (8.7 g, 53.6 mmoles) in ACN (150 mL) is added hydroxy(tosyloxy)iodobenzene (22.1 g, 56.3 mmoles). The reaction mixture is heated at reflux for 5 hours. Solvent and volatiles are removed under reduced pressure. The residue is purified by silica gel chromatography eluting with (heptane:AcOEt) (90:1) to give toluene-4-sulfonic acid 3-methyl-2-oxo-3-phenyl-butyl ester. The reaction mixture is heated at reflux for 5 hours Solvent and volatiles are removed under reduced pressure The residue is purified by silica gel chromatography eluting with (heptane:AcOEt) (90:1)

Conditions: temp:40.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 8.8 g. of 50% NaH oil dispersion in 150 ml. of dry benzene was treated at 25° C. with 13.6 g. of ethylformate in 20 ml. of dry benzene under N2. Over a period of a half hour, 14.9 g. of 3-methyl-3-phenyl-2-butanone in 80 ml. of dry benzene was added at 0° C. After stirring at 40° C. for 4 hours, the mixture was diluted with 250 ml. of ether, treated with ice and acidified with hydrochloric acid. The acidic solution ws extracted with ether and the ether extract was washed with brine, sodiuim bicarbonate solution, washed again with brine and dried. The solvent was evaporated and the residue was distilled under reduced pressure to afford 14.8 g. of the title product as an oil, B. P. 83°-84°/0.2 mm., λmaxfilm 3.5 (broad) 5.75, 5.90, 6.12, 6.30, 6.70, 6.80, 6.95, 7.31, 7.94, 8.18, 9,38, 12,60, 13.05 and 14.28 μ. A mixture of 8.8 g Over a period of a half hour the mixture was diluted with 250 ml The acidic solution ws extracted with ether the ether extract was washed with brine, sodiuim bicarbonate solution washed again with brine dried The solvent was evaporated the residue was distilled under reduced pressure to afford 14.8 g

Conditions: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Into a 250 ml round bottomed flask equipped with magnetic stirring and a reflux condenser was placed 15 g (98 mmol) of POCl3, 30 g (145 mmol) of PCl5, and 19.9 g (123 mmol) of α,α-dimethylbenzyl methyl ketone. The reaction was heated in an oil bath to an external temperature of 110° C. Gas evolution ceased after one hour. The reaction was cooled and carefully poured onto ice and aqueous ammonium hydroxide. Extractive workup with diethyl ether gave a mixture of 1-(α,α-dimethylbenzyl)-1-chloroethylene and 1-(α,α-dimethylbenzyl)-1,1-dichloroethane. Vacuum distillation gave purified 1-(α,α-dimethylbenzyl)-1-chloroethylene bp (23 torr) 110-120° C. Into a 250 ml round bottomed flask equipped a reflux condenser was placed The reaction was cooled Vacuum distillation gave purified 1-(α,α-dimethylbenzyl)-1-chloroethylene bp (23 torr) 110-120° C.