2,6-Dimethyl-4-bromobenzaldehyde

反応条件: temp:0.00; pressure:0.00; stir:

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: 4-Bromo-2,6-di methylbenzyl alcohol, from 4-bromo-2,6-dimethylbenzaldehyde (Hjed, H. et al. Acta Chem. Scand. 1965, 19:2166); 95% yield, mp 1 17-119° C. 95% yield, mp 1 17-119° C.

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

実験手順: 4-Bromo-2,6-di methylbenzyl alcohol, from 4-bromo-2,6-dimethylbenzaldehyde (Hjed, H. et al. Acta Chem. Scand. 1965, 19:2166); 95% yield, mp 1 17-119° C. 95% yield, mp 1 17-119° C.

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: 4-Bromo-2,6-dimethylbenzyl alcohol, from 4-bromo-2,6-dimethylbenzaldehyde (Hjed, H. et al. Acta Chem. Scand. 1965, 19:2166); 95% yield, mp 117-119° C.

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

実験手順: 4Bromo-2,6-dimethylbenzyl alcohol, from 4-bromo-2,6-dimethylbenzaldehyde (Hjed, H. et al. Acta Chem. Scand. 1965, 19:2166); 95% yield, mp 117-119° C.

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

実験手順: 4-Bromo-2,6-dimethylbenzyl alcohol, from 4-bromo-2,6-dimethylbenzaldehyde (Hjed, H. et al. Acta Chem. Scand. 1965, 19:2166); 95% yield, mp 117-119° C.

反応条件: temp:140.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of 4-bromo-2,6-dimethylbenzaldehyde (2.51 g, 12 mmol), 4-methyl-benzenesulfonic acid (0.20 g, 1.2 mmol), and propane-1,3-diol (1.2 mL, 16 mmol) in toluene (200 mL) was heated under nitrogen at 140° C. for 16 h, using a Dean-Stark trap to remove water. The reaction solution was then cooled to 25° C., diluted with EtOAc (200 mL), and sequentially washed with saturated aqueous sodium bicarbonate solution (100 mL) and brine (100 mL). The organic layer was separated, dried over MgSO4, filtered, and concentrated in vacuo to provide a yellow-brown oil. Hexane (200 mL) was added to the oil, and the resulting mixture was stirred vigorously for 10 min, resulting in the precipitation of a solid. This solid was collected by vacuum filtration, washed with hexanes (100 mL), and dried in vacuo to provide 2-(4-bromo-2,6-dimethylphenyl)-1,3-dioxane as a tan solid. to remove water The reaction solution was then cooled to 25° C. diluted with EtOAc (200 mL) sequentially washed with saturated aqueous sodium bicarbonate solution (100 mL) and brine (100 mL) The organic layer was separated dried over MgSO4 filtered concentrated in vacuo to provide a yellow-brown oil resulting in the precipitation of a solid This solid was collected by vacuum filtration washed with hexanes (100 mL) dried in vacuo

反応条件: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: DIBAL-H (1.0M in hexanes; 22.0 mL, 22.0 mmol) was added to a solution of 4-bromo-2,6-dimethylbenzonitrile (3.87 g, 18 mmol) in CH2Cl2 (50 mL) at 0° C., and the resulting mixture stirred at 25° C. for 3 h. Saturated aqueous sodium potassium tartrate solution (75 mL) was then slowly added, and the resulting mixture was stirred vigorously for 30 min. The organic layer was separated, and the aqueous layer was extracted with CH2Cl2). The combined organic extracts were dried over MgSO4, filtered, and concentrated in vacuo. Chromatographic purification of the residue (silica gel, 0-20% EtOAc/hexanes) furnished 4-bromo-2,6-dimethylbenzaldehyde as a light brown solid. the resulting mixture was stirred vigorously for 30 min The organic layer was separated the aqueous layer was extracted with CH2Cl2) The combined organic extracts were dried over MgSO4 filtered concentrated in vacuo Chromatographic purification of the residue (silica gel, 0-20% EtOAc/hexanes)

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

実験手順: 4-Bromo-2,6-di methylbenzyl alcohol, from 4-bromo-2,6-dimethylbenzaldehyde (Hjed, H. et al. Acta Chem. Scand. 1965, 19:2166); 95% yield, mp 1 17-119° C. 95% yield, mp 1 17-119° C.