| 摘要 |
1,139,634. Glycol monoesters. BADISCHE ANILIN- & SODA-FABRIK A.G. 27 May, 1966 [29 May, 1965; 23 Oct., 1965], No. 23886/66. Heading C2C. Carboxylic acid monoesters of aliphatic, cycloaliphatic or arylaliphatic vicinal diols are obtained by reacting a carboxylic acid with an epoxide derived from an aliphatic, cycloaliphatic or arylaliphatic olefine at elevated temperature in the presence of a thioether or a sulphoxide. Suitable carboxylic acids are aliphatio mono- or poly-carboxylic acids, cycloaliphatic, araliphatic and aromatic mono- or poly-carboxylio acids. Suitable epoxides are aliphatic, cycloaliphatic and araliphatic epoxides. Specified thioethers and sulphoxides are those of the formulµ R-S-R<SP>1</SP> and R-SO-R<SP>1</SP> wherein R and R<SP>1</SP> represent organic radicals and they may together form a ring. The thioethers may be formed in situ from H 2 S, mercaptans or thiophenols and alkylene oxide reactant. The sulphoxides may also be formed in situ from thioethers and oxidizing agents. Examples are given for the production of glycol monoacetate, glycol monoacrylate, glycol monobenzoate, bis- (hydroxyethyl)-terephthalate and the monoglycol ester of terephthalic acid. |
