反应详情

温度

-10 °C

To a solution of 7.01 ml Red-Al 13.5 M (24.54 mmol) in toluene was added at 0° C. a solution of 3.0 ml 1-methylpiperazine (26.89 mmol) in 16 ml toluene over 30 min. The resulting solution was then added dropwise over 40 min to 1.1 g of 2-chloro-4-cyclopropyl-benzoic acid methyl ester (5.2 mmol) in 32 ml toluene between −5° C. and 0° C. After stirring for 30 min at this temperature, the reaction mixture was cooled to −10° C. and treated dropwise with 30 ml water. The mixture was then filtered, diluted with ethylacetate, washed with 1N—HCl, brine, dried over magnesium sulfate, filtered again and concentrated in vacuo, leading to 0.98 g of 2-chloro-4-cyclopropyl-benzaldehyde as a brown oil (100%). MS (+cEI): 180.1 (M).

1. filtrationThe mixture was then filtered
2. additiondiluted with ethylacetate
3. washwashed with 1N—HCl, brine
4. dry with materialdried over magnesium sulfate
5. filtrationfiltered again
6. concentrationconcentrated in vacuo