methyl 2-[2-(bromomethyl)phenyl]-2-oxoacetate

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 5.34 g (30 millimoles) of methyl 2-methylphenylglyoxylate and 5.34 g (30 millimoles) of N-bromosuccinimide in 1,000 ml of tetrachloromethane are exposed to a 300 W mercury vapor lamp for one hour. Thereafter, the organic phase is washed once with water and three times with sodium bicarbonate solution, dried over sodium sulfate/sodium carbonate and evaporated down, and the crude product is then chromatographed over silica gel using 1:9 methyl tert-butyl ether/n-hexane. 3.8 g (49%) of the abovementioned compound are obtained as a yellow oil. Thereafter, the organic phase is washed once with water and three times with sodium bicarbonate solution dried over sodium sulfate/sodium carbonate evaporated down the crude product is then chromatographed over silica gel using 1:9 methyl tert-butyl ether/n-hexane

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 5.34 g (30 millimoles) of methyl 2-methylphenyl-glyoxylate and 5.34 g (30 millimoles) of N-bromosuccinimide in 1000 l of tetrachloromethane are exposed to a 300 W Hg vapor lamp for one hour. The organic phase is then washed once with water and three times with sodium bicarbonate solution and is dried over sodium sulfate/sodium carbonate. After the solution has been evaporated down, the crude product is chromatographed over silica gel using 1:9 methyl tert-butyl ether/n-hexane. 3.8 g (49%) of the abovementioned compound are obtained as a yellow oil. The organic phase is then washed once with water and three times with sodium bicarbonate solution is dried over sodium sulfate/sodium carbonate After the solution has been evaporated down the crude product is chromatographed over silica gel using 1:9 methyl tert-butyl ether/n-hexane

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 5.34 g (30 millimoles) of methyl 2-methylphenylglyoxylate and 5.34 g (30 millimoles) of N-bromosuccinimide in 1,000 ml of tetrachloromethane are exposed to a 300 W Hg vapor lamp for one hour. Thereafter, the organic phase is washed once with water and three times with sodium bicarbonate solution and dried over sodium sulfate/sodium carbonate. It is evaporated down and the crude product is then chromatographed over silica gel using 9:1 methyl tert-butyl ether/n-hexane. 3.8 g (49%) of the abovementioned compound is obtained as a yellow oil. Thereafter, the organic phase is washed once with water and three times with sodium bicarbonate solution dried over sodium sulfate/sodium carbonate It is evaporated down the crude product is then chromatographed over silica gel using 9:1 methyl tert-butyl ether/n-hexane

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 5.34 g (30 millimoles) of methyl 2-methylphenylglyoxylate and 5.34 g (30 millimoles) of N-bromosuccinimide in 1,000 ml of tetrachloromethane are exposed to a 300 W mercury vapor lamp for one hour. Thereafter, the organic phase is washed once with water and three times with sodium bicarbonate solution, dried over sodium sulfate/sodium carbonate and evaporated down, and the crude product is then chromatographed over silica gel using 1:9 methyl tert-butyl ether/n-hexane. 3.8 g (49%) of the abovementioned compound are obtained as a yellow oil. Thereafter, the organic phase is washed once with water and three times with sodium bicarbonate solution dried over sodium sulfate/sodium carbonate evaporated down the crude product is then chromatographed over silica gel using 1:9 methyl tert-butyl ether/n-hexane

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 5.34 g (30 millimoles) of methyl 2-methylphenylglyoxylate and 5.34 g (30 millimoles) of N-bromosuccinimide in 1,000 ml of tetrachloromethane are exposed to a 300 W mercury vapor lamp for one hour. Thereafter, the organic phase is washed once with water and three times with sodium bicarbonate solution, dried over sodium sulfate/sodium carbonate and evaporated down, and the crude product is then chromatographed over silica gel using 1:9 methyl tert-butyl ether/n-hexane. 3.8 g (49%) of the abovementioned compound are obtained as a yellow oil. Thereafter, the organic phase is washed once with water and three times with sodium bicarbonate solution dried over sodium sulfate/sodium carbonate evaporated down the crude product is then chromatographed over silica gel using 1:9 methyl tert-butyl ether/n-hexane

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 5.34 g (30 millimoles) of methyl 2-methylphenylglyoxylate and 5.34 g (30 millimoles) of N-bromosuccinimide in 1000 l of tetrachloromethane are exposed to a 300 W Hg vapor lamp for one hour. The organic phase is then washed once with water and three times with sodium bicarbonate solution and is dried over sodium sulfate/sodium carbonate. After the solution has been evaporated down, the crude product is chromatographed over silica gel using 1:9 methyl tert-butyl ether/n-hexane. 3.8 g (49%) of the abovementioned compound are obtained as a yellow oil. The organic phase is then washed once with water and three times with sodium bicarbonate solution is dried over sodium sulfate/sodium carbonate After the solution has been evaporated down the crude product is chromatographed over silica gel using 1:9 methyl tert-butyl ether/n-hexane

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 5.34 g (30 millimoles) of methyl 2-methylphenylglyoxylate and 5.34 g (30 millimoles) of N-bromosuccinimide in 1000 l of tetrachloromethane are exposed to a 300 W Hg vapor lamp for one hour. The organic phase is then washed once with water and three times with sodium bicarbonate solution and is dried over sodium sulfate/sodium carbonate. After the solution has been evaporated down, the crude product is chromatographed over silica gel using 1:9 methyl tert-butyl ether/n-hexane. 3.8 g (49%) of the abovementioned compound are obtained as a yellow oil. The organic phase is then washed once with water and three times with sodium bicarbonate solution is dried over sodium sulfate/sodium carbonate After the solution has been evaporated down the crude product is chromatographed over silica gel using 1:9 methyl tert-butyl ether/n-hexane

反応条件: temp:23.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 10.4 g (56 millimoles) of potassium transcinnamate and 12.0 g (47 millimoles) of methyl orthobromomethylphenylglyoxalate are dissolved in 250 ml of N-methylpyrrolidone, a pinch of potassium iodide is added and the mixture is stirred for 15 hours at room temperature (23° C.). Thereafter, the mixture is poured onto 500 ml of ice water and extracted with 3×200 ml of methyl tert-butyl ether and the organic phase is washed with water, dried over sodium sulfate and evaporated down in a rotary evaporator. The yield of ketoester is 15.0 g (99%). Thin layer chromatographic analysis shows that it is virtually pure. extracted with 3×200 ml of methyl tert-butyl ether the organic phase is washed with water dried over sodium sulfate evaporated down in a rotary evaporator

反応条件: temp:23.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 10.4 g (56 millimoles) of potassium transcinnamate and 12.0 g (47 millimoles) of methyl orthobromomethylphenylglyoxalate are dissolved in 250 ml of N-methylpyrrolidone, a pinch of potassium iodide is added and the mixture is stirred for 15 hours at room temperature (23° C.). Thereafter, the mixture is poured onto 500 ml of ice water and extracted with 3×200 ml of methyl tert-butyl ether and the organic phase is washed with water, dried over sodium sulfate and evaporated down in a rotary evaporator. The yield of ketoester is 15.0 g (99%). Thin layer chromatographic analysis shows that it is virtually pure. extracted with 3×200 ml of methyl tert-butyl ether the organic phase is washed with water dried over sodium sulfate evaporated down in a rotary evaporator

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 5.34 g (30 millimoles) of methyl 2-methylphenylglyoxylate and 5.34 g (30 millimoles) of N-bromosuccinimide in 1000 l of tetrachloromethane are exposed to a 300 W Hg vapor lamp for one hour. The organic phase is then washed once with water and three times with sodium bicarbonate solution and is dried over sodium sulfate/sodium carbonate. After the solution has been evaporated down, the crude product is chromatographed over silica gel using 1:9 methyl tert-butyl ether/n-hexane. 3.8 g (49%) of the abovementioned compound are obtained as a yellow oil. The organic phase is then washed once with water and three times with sodium bicarbonate solution is dried over sodium sulfate/sodium carbonate After the solution has been evaporated down the crude product is chromatographed over silica gel using 1:9 methyl tert-butyl ether/n-hexane