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    • 1. 发明授权
    • Process for the preparation of hydroxyphenylpropionic acid esters
    • 羟基苯丙酸酯的制备方法
    • US5206414A
    • 1993-04-27
    • US876813
    • 1992-04-29
    • Samuel EvansPaul DubsMilos RusekZdenek MazourArpad Major
    • Samuel EvansPaul DubsMilos RusekZdenek MazourArpad Major
    • C07C67/03C07C67/347C07C69/732
    • C07C67/03C07C67/347
    • 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, andn is a number from 1 to 4 or 6, andA 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 IVM.sub.m An (IV)in whichM is Li, Na, K, Rb or Cs,m is the valency of An, andAn is a fluoride, hydroxide, phosphate, formate, acetate or --OR.sub.5 radical, andR.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.
    • 制备通式为(I)的化合物的方法,其中R 1和R 2相同或不同,为氢,C 1 -C 18烷基,苯基,C 1 -C 4烷基取代的苯基,C 7 -C 9苯基烷基,C 5 -C 12环烷基或 C 1 -C 4烷基取代的C 5 -C 12环烷基,R 3是氢或甲基,m是0,1,2或3,n是1至4或6的数,A如说明书中所定义,通过化合物 式(II)其中m,R 1和R 2如上定义,与式IIIA(H)n,(III)的化合物反应,其中A和n如说明书中所定义,其包含 在含有M为Li,Na,K,Rb或Cs的式IV MmAn(IV)的碱金属化合物作为活性物质的催化剂存在下进行反应,m为An的化合价, 并且An是氟化物,氢氧化物,磷酸盐,甲酸盐,乙酸盐或-OR 5基团,R 5是具有1至4个碳原子的烷基或苯基,作为载体,碱性物质以10% 重量百分比的含水悬浮液,pH> 10,选自一组或多组来自包含碱土金属氧化物,氢氧化物,铝酸盐或硅酸盐的系列的物质。