| 摘要 |
1505429 Esters and lactones by esterification SUMITOMO CHEMICAL CO Ltd 5 July 1976 [27 Sept 1975 13 Jan 1976] 27823/76 Heading C2C Carboxylic esters or lactones are made by reacting a carboxylic acid with an alcohol, or a hydroxy acid in the presence of a 1-substituted- 2-halopyridinium salt or a 1-substituted-2- haloquinolinium salt and a hydrogen halide acceptor optionally in the presence of an anhydrous organic solvent. |
