申请人:Bayer Aktiengesellschaft
公开号:US04304940A1
公开(公告)日:1981-12-08
In the preparation of a 1-alkyl- and 2-aryl-thio-methylphenol of the formula ##STR1## in which R.sup.1 is, or the radicals R.sup.1 are, in the 3-, 5- and/or 6-positions relative to the hydroxyl group and each independently is a hydrogen or halogen atom, or an alkyl, cycloalkyl, aryl, aralkyl or alkoxy group, n is 1, 2, or 3, and R.sup.2 is an optionally substituted alkyl group having 1 to 12 carbon atoms, an optionally substituted cycloalkyl group having 3 to 6 carbon atoms, an optionally substituted phenyl radical or an optionally substituted aralkyl radical, by reacting a phenol of the formula ##STR2## with formaldehyde or an formaldehyde producing compound and with a mercaptan or a thiophenol of the formula R.sup.2 --S--H. the improvement which comprises effecting the reaction at a temperature of about 90.degree. to 220.degree. C. in the presence of at least one compound of lithium, magnesium, calcium, strontium, barium, zinc, cadmium, lead, manganese, cobalt, nickel, cooper, iron, chromium and aluminum as a catalyst. The products are obtained in high yield and selectivity.
在制备式为##STR1##的1-烷基-和2-芳基-硫甲基酚中,其中R1是3-、5-和/或6-位与羟基基团相对的基团R1,每个基团独立地是氢或卤素原子,或烷基、环烷基、芳基、芳基烷基或烷氧基,n为1、2或3,R2为1至12个碳原子的可选取代烷基、3至6个碳原子的可选取代环烷基、可选取代苯基或可选取代芳基烷基的巯基或硫代苯酚,通过将式为##STR2##的酚与甲醛或甲醛产生化合物以及巯基或硫代苯酚R2-S-H反应,改进在于在至少一种锂、镁、钙、锶、钡、锌、镉、铅、锰、钴、镍、铜、铁、铬和铝化合物的存在下,作为催化剂,于温度约90℃至220℃下进行反应。产物得率和选择性高。