Tributylamine → 1-(2-Ethylbutyl)cyclohexanecarbonyl chloride

Participants

Reaction Conditions

Reaction Steps

A mixture of 6.0 kg (28.3 mol) 1-(2-ethyl-butyl)-cyclohexanecarboxylic acid and 20.6 mL tributylamine (0.085 mmol) in 10 L heptane was warmed to 50° C. 2.5 L (34.5 mol) of thionyl chloride was added during 40 minutes at a temperature of 40-50° C. (reaction is endothermic, vigorous gas evolution) and the reaction mixture was kept at 53-55° C. An IPC-control after 60 minutes indicated complete conversion (0.04% 1-(2-ethyl-butyl)-cyclohexanecarboxylic acid and no 1-(2-ethyl-butyl)-cyclohexanecarboxylic acid anhydride). After removing volatile components under reduced pressure (70° C. bath, 13-8 mbar) 6.86 kg of the residue was obtained (assay 92.5% 1-(2-ethyl-butyl)-cyclohexanecarbonyl chloride, yield 97.2%)

Provenance & Evidence