1-Bromopropane → Propyl cyclohexanecarboxylate

Participants

Reaction Conditions

Reaction Steps

To cyclohexanecarboxylic acid sodium salt (5.0 g, 33.3 mmol) in THF (80 mL) tetrabutylammonium bromide (1.074 g, 3.33 mmol) and 1-bromopropane (4.545 g, 49.95 mmol) in THF (120 mL) were added. The mixture was stirred 72 h at 50° C., cooled to room temperature and filtered. The precipitate was washed with THF. The filtrate was concentrated and the residue diluted with TBME. The solution was washed with water and the aqueous phases were re-extracted with TBME. The organic phases were combined, dried over sodium sulfate and evaporated to afford 4.2 g (74%) cyclohexanecarboxylic acid n-propyl ester as a liquid, GC purity 99% (area). 1H-NMR (CDCl3, 400 MHz): ppm 0.94 (t, 3H), 1.15-1.36 (m, 3H), 1.38-1.50 (m, 2H), 1.55-1.81 (m, 5H), 1.85-1.92 (m, 2H), 2.23-2.32 (m, 1H), 4.02 (q, 2H).

Provenance & Evidence