1-Chlorooctane → HCID 11830718, compound

Participants

Reaction Conditions

Reaction Steps

The following experimental procedure is representative of the reactions set forth below in Table III. The organocalcium reagent (2.66 mmol) was prepared from 1-chlorooctane (395 mg, 2.66 mmol) and highly reactive calcium (3.10 mmol) as described above. An organocalcium cuprate reagent was prepared by adding lithium 2-thienylcyanocuprate (Aldrich Chemical Co., Milwaukee, Wis., 0.25M in THF, 14 mL, 3.50 mmol) to the calcium reagent via a syringe at -50° C. The reaction mixture was gradually warmed to -35° C. over a 30 minute period. The reaction mixture was cooled to -50° C. and 2-cyclohexen-1-one (210 mg, 2.18 mmol) was added via a disposable syringe. The resulting mixture was gradually warmed to room temperature. Saturated aqueous NH4Cl solution (20 mL) was added at room temperature. The reaction mixture was then filtered through a small pad of Celite™ filter agent and was washed with Et2O (50 mL). The aqueous layer was extracted with Et2O (2×30 mL). The combined organic phases were washed with H2O (3×15 mL) and dried over anhydrous MgSO4. Removal of solvent and flash-column chromatography on silica gel (70 g, 230-400 mesh, eluted sequentially with 50:1 hexanes/EtOAc and 10:1 hexanes/EtOAc) gave 3-octylcyclohexanone (401 mg, 87% yield): IR (neat) 2954, 2925, 2854, 1714, 1458, 1225 cm-1 ; 1H NMR (200 MHz, CDCl3) δ 1.10-2.50 (m, 23 H), 0.88 t, J=6.4 Hz, 3 H); 13C NMR (50 MHz, CDCl3) δ 212.0, 48.2, 41.5, 39.1, 36.6, 31.8, 31.3, 29.7, 29.5, 29.2, 26.6, 25.3, 22.6, 14.1.

Provenance & Evidence