反应详情

3-Cyanomethylindene (3.84 g, 0.025 mol), prepared as described in example 14, was dissolved in a mixture of hexane and THF and stirred under nitrogen at -78°. Dissobutylaluminum hydride (DIBAL) (19.2 ml of a 1.5M solution in toluene; 0.029 mmol) was added and the mixture stirred at ambient temperature 2.5 hours. Saturated sodium chloride solution (220 ml) was added and the mixture stirred another 20 minutes. 5% H2SO4 (90 ml) was added and the solution immediately extracted with ether. The ether layer was dried over sodium sulfate, filtered, and evaporated to dryness in vacuo. The residue was chromatographed on a silica gel column eluted with 8% Et2O in hexane. The product fraction was evaporated to dryness to provide 2-(1H-indene-1-yl)acetaldehyde.

1. addition0.029 mmol) was added
2. stirringthe mixture stirred at ambient temperature 2.5 hours
3. stirringthe mixture stirred another 20 minutes
4. extractionthe solution immediately extracted with ether
5. dry with materialThe ether layer was dried over sodium sulfate
6. filtrationfiltered
7. customevaporated to dryness in vacuo
8. customThe residue was chromatographed on a silica gel column
9. washeluted with 8% Et2O in hexane
10. customThe product fraction was evaporated to dryness