Ethyl (3,3,5,5-tetramethylcyclohexylidene)acetate → HCID 22630144, compound

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Reaction Steps

To a stirred solution of LiAlH4 (1.7 g, 45 mmol) in dry ether (60 ml) a solution of acetate 2 (3.2 g, 15 mmol) in ether (20 ml) was added dropwise while cooling with ice water. Stirring was continued for 1 h and the residual LiAlH4 was destroyed with water. The aqueous layer was separated and twice extracted with ether (30 ml). The combined extracts were washed with brine (50 ml) and dried over MgSO4. After concentration in vacuo an oily residue was purified by Kugelrohr short path distillation (150-170° C., 11 mm Hg) to give 3 (2.3 g, 89%) as an oil. 1H NMR (CDCl3, TMS): 0.92 (6H, s, 3,5-CH3); 1.10 (1H, br s, OH); 1.28 (2H, s, 4-CH2); 1.87 and 1.94 (total 4H, both s, 2,6-CH2); 4.16 (2H, d, 7 Hz, CH2O) and 5.50 ppm (1H, t, 7 Hz, ═C—H).

Provenance & Evidence