Water → 2-Methyl-2-phenylpropanal

To a solution of oxalylchloride (4.1 ml) in dichloromethane (100 ml) was added dropwise a solution of dimethylsufoxide (7.14 g) in dichloromethane (10 ml) at -60° C., and the mixture was stirred for 10 minutes. To the resultant mixture was added a solution of 2-methyl-2-phenylpropanol (6.16 g) in dichloromethane (15 ml) at the same temperature. After stirring for one hour, to the mixture was added triethylamine (20.7 g). The mixture was further stirred for 30 minutes and allowed to room temperature. After adding water, the mixture was extracted with dichloromethane. The extract was washed with a saturated aqueous solution of sodium chloride, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The resultant residue was subjected to silica gel (40 g) column chromatography and elution with 2% ethyl acetate hexane solution gave 4.93 g of 2-methyl-2-phenylpropanal.

1. stirringAfter stirring for one hour, to the mixture
2. stirringThe mixture was further stirred for 30 minutes
3. customallowed to room temperature
4. extractionthe mixture was extracted with dichloromethane
5. washThe extract was washed with a saturated aqueous solution of sodium chloride
6. dry with materialdried over anhydrous magnesium sulfate
7. concentrationconcentrated under reduced pressure
8. washThe resultant residue was subjected to silica gel (40 g) column chromatography and elution with 2% ethyl acetate hexane solution

ORDレコード

ord-5d6c495eb6e5443890604fe49e7c2e0d

出典データセット

uspto-grants-1991_01

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US04987132