反应详情

Methyl (S)-(+)-3-(t-butyldimethylsilyloxy)-2-methylpropionate (10.0 g; 43.1 mmol) was dissolved in anhydrous dichloromethane (100 ml), and a hexane solution (100 ml) of 1M diisobutylaluminum hydride was dropwise added thereto at a temperature below 0° C. in an argon stream. After stirring for 30 minutes, water (20 ml) was added thereto, and the resultant mixture was stirred for 1 hour, followed by separation of the organic layer. The aqueous layer was extracted with dichloromethane, and the extracts were combined together with the organic layer. The solvent was distilled under reduced pressure to give (R)-(+)-3-(t-butyldimethylsilyloxy)-2-methyl-1-propanol (7.9 g; yield, 90%) as a colorless oil. A portion of the oil was distilled to give a purified product (bath temperature: 112° C./17 mmHg).

1. customat a temperature below 0° C.
2. customfollowed by separation of the organic layer
3. extractionThe aqueous layer was extracted with dichloromethane
4. distillationThe solvent was distilled under reduced pressure