反应详情

A mixture of 3 g of cis-4-hydroxy-cyclohexanecarboxylic acid ethyl ester, 3 g of imidazole, 33 g of tert-butyldimethylsilyl-chloride, and 6 mL of DMF was stirred under inert atmosphere overnight. The mixture was diluted with 250 mL of water and extracted into 3×50 mL portions of ether. The combined ether extracts were washed with 2×50 mL of water, dried over magnesium sulfate and concentrated under reduced pressure. Drying under vacuum overnight gave 4.5 g of product as a colorless oil: 1H NMR (400 MHz, CDCl3) 4.1 (dd, 2H), 3.58 (m, cis isomer, 0.85H), 2.2 (m, 1H), 1.95 (m, 4H), 1.6 (m, 1H), 1.5 (m, 1H), 1.22 (m, 6H), 0.9 (s, 9H), 0.04 (s, 6H).

1. extractionextracted into 3×50 mL portions of ether
2. washThe combined ether extracts were washed with 2×50 mL of water
3. dry with materialdried over magnesium sulfate
4. concentrationconcentrated under reduced pressure
5. customDrying under vacuum overnight