Table 3.

Condensation of carboxylic acids with different alcohols in the presence of the TPPO/(COCl)₂/Et₃N system.

^aReactions were carried out with RCOOH (5 mmol, 1 equiv), R₁OH (6.5 mmol, 1.3 equiv), TPPO (5 mmol, 1 equiv), (COCl)₂ (6.5 mmol, 1.3 equiv) and Et₃N (5 mmol, 1 equiv) in CH₃CN (5 mL) at room temperature for 1 h.

^bIsolated yield.