Abstract
An efficient and convenient method for the esterification of phenols from p-nitrobenzoic acid using phosphonitrilic chloride (PNT) and N-methyl morpholine (NMM) was developed. PNT was been efficiently used for the activation of p-nitrobenzoic acid. Various p-nitrobenzoates of phenols were obtained with excellent yields. The phenol with electron withdrawing nitro group was found to afford higher yield of the product than that of electron donating groups.
