| 摘要 |
1529415 Ortho-Alkylation of phenols GENERAL ELECTRIC CO 31 March 1977 [13 April 1976] 13723/77 Heading C2C A process for the selective ortho-alkylation of a phenolic compound of formula wherein each R is H, C 1-12 alkyl, C 6-12 aryl or C 7-12 alkaryl comprises reacting said phenolic compound with an alkanol, e.g. CH 3 OH of up to 12 carbon atoms at a temperature of at least 185‹ C. in the presence of Cu, Zn, Al mixed oxide catalyst. The examples describe the preparation of o-cresol and 2,6-xylenol. |
