申请人:Ciba-Geigy Corporation
公开号:US05206414A1
公开(公告)日:1993-04-27
A process for the preparation of compounds of the general formula ##STR1## where R.sub.1 and R.sub.2 are identical or different and are hydrogen, C.sub.1 -C.sub.18 alkyl, phenyl, C.sub.1 -C.sub.4 alkyl-substituted phenyl, C.sub.7 -C.sub.9 phenylalkyl, C.sub.5 -C.sub.12 cycloalkyl or C.sub.1 -C.sub.4 alkyl-substituted C.sub.5 -C.sub.12 cycloalkyl, R.sub.3 is hydrogen or methyl, m is 0, 1, 2 or 3, and n is a number from 1 to 4 or 6, and A is as defined in the description, by reacting a compound of the formula II ##STR2## where m, R.sub.1 and R.sub.2 are as defined above, with a compound of the formula III ##STR3## where A and n are as defined in the description, which comprises carrying out the reaction in the presence of a catalyst which contains, as active material, an alkali metal compound of the formula IV M.sub.m An (IV) in which M is Li, Na, K, Rb or Cs, m is the valency of An, and An is a fluoride, hydroxide, phosphate, formate, acetate or --OR.sub.5 radical, and R.sub.5 is alkyl having 1 to 4 carbon atoms or phenyl, and, as support, an alkaline material which, measured in 10% strength by weight aqueous suspension, has a pH>10, selected from one or more groups of substances from the series comprising the alkaline earth metal oxides, hydroxides, aluminates or silicates.
一种制备通式为##STR1##的化合物的方法,其中R.sub.1和R.sub.2相同或不同,分别为氢、C.sub.1-C.sub.18烷基、苯基、C.sub.1-C.sub.4烷基取代的苯基、C.sub.7-C.sub.9苯基烷基、C.sub.5-C.sub.12环烷基或C.sub.1-C.sub.4烷基取代的C.sub.5-C.sub.12环烷基,R.sub.3为氢或甲基,m为0、1、2或3,n为1至4或6之间的数字,A如描述中所定义,通过将式II的化合物##STR2##其中m、R.sub.1和R.sub.2如上定义,与式III的化合物##STR3##其中A和n如描述中所定义,反应,在催化剂的存在下进行反应,所述催化剂包含作为活性物质的公式IV M.sub.m An(IV)的碱金属化合物,在该公式中,M为Li、Na、K、Rb或Cs,m为An的价,An为氟化物、氢氧化物、磷酸盐、甲酸盐、乙酸盐或--OR.sub.5基团,R.sub.5为具有1至4个碳原子的烷基或苯基,并作为载体,一种碱性物质,其在10%重量水悬浮液中测得的pH>10,从包括碱土金属氧化物、氢氧化物、铝酸盐或硅酸盐的一系列物质的一个或多个组中选择。