Effect of Solvent and Ultrasound on Esterification of Phenols.

Abstract

Esterification Esterification O 0315Effect of Solvent and Ultrasound on Esterification of Phenols. -The esterification of phenols (I) with acid chlorides (II) in the absence of any base or catalyst under the influence of ultrasound is studied. Best results are achieved in CH 2 Cl 2 as solvent.-(RAMA, K.; PASHA*, M. A.; Indian J.

Zinc dust: An extremely active and reusable catalyst in acylation of phenols, thiophenol, amines and alcohols in a solvent-free system

“…Earlier report from our laboratory described a convenient esterification by acid chlorides; as the reactions took a long time to go to completion, the reactions were studied under sonication to get the esters in high yield [36,37]. In continuation of work on the development of simple methods for the synthesis of useful products, we are reporting a novel method of acylation of phenol and alcohol with acid chloride using catalytic amount of zinc dust under solvent-free condition at 25 °C (Figure 1).…”

An efficient sonochemical oxidation of benzyl alcohols into benzaldehydes by FeCl3/HNO3 in acetone

“…A few important reports include, the synthesis of d-chloroesters [4], reduction of nitroarenes to anilines, [5] reduction of nitroarenes to azoarenes, [6] regioselective synthesis of b-iodoethers from olefin-I 2 -alcohol, [7] esterification of phenols [8] and very recently the synthesis of amidoalkyl-2-naphthols [9].…”

Ultrasound assisted synthesis of δ-chloroesters from tetrahydrofuran and acyl chlorides in the presence of catalytic zinc dust

“…In continuation of our work on the use of inexpensive, readily available metals and metal salts for organic functional group transformations [11][12][13][14][15][16][17][18][19][20][21], we expected that acid chlorides may be converted to 1,2-diketones by zinc metal in aprotic solvents. A set of four solvents-hexane, toluene, benzene and THF were selected to study the reaction of acyl halides with zinc dust under sonic conditions.…”