3-Chlorobenzoic Acid → 3-Chlorobenzoyl 1-methyl-1-propyl carbonate

Participants

Reaction Steps

To a well-stirred reaction vessel equipped with a thermometer and a pH electrode were added 39 g of water and 0.20 g of Arquad CB50 at 5° C. After the addition of 0.05 mole of 3-chlorobenzoic acid the pH was adjusted to 6 using a 10 wt % aqueous NaOH solution. Then, 0.05 mole of sec-butyl chloroformate was dosed within 5 min at 5° C. During this time and a post-reaction time of 165 min at 5° C. the pH was kept at a value between 6 and 9. The reaction mixture was allowed to separate, giving 12.5 g of 3-chlorobenzoyl 1-methyl-1-propyl carbonate having a content of 98% in a yield of 95%.

Provenance & Evidence