申请人:Sumitomo Chemical Company, Limited
公开号:US05144071A1
公开(公告)日:1992-09-01
Alkenecarboxylic esters of the formula I ##STR1## where R.sup.1 is alkyl of 1 to 6 carbon atoms, R.sub.2 is hydrogen or alkyl or 1 to 4 carbon atoms, the substituents being identical or different, and n is 1, 2 or 3 are prepared by reacting lactones of the formula II ##STR2## where R.sup.2 has the same meanings as in the formula I, R.sub.3 is hydrogen or methyl and m is 0, 1 or 2, with the proviso that n and m differ by 1 when R.sub.3 is hydrogen and by 2 when R.sub.3 is methyl, with alkanols having 1 to 6 carbon atoms at from 50.degree. to 450.degree. C. in the presence of zeolites and/or phosphates as catalysts.
式I的烯丙酸酯 ##STR1##其中R.sup.1是1至6个碳原子的烷基,R.sub.2是氢或1至4个碳原子的烷基,取代基相同或不同,n为1、2或3,通过在存在沸石和/或磷酸盐催化剂的情况下,将式II的内酯与1至6个碳原子的脂肪醇反应,其中 ##STR2## R.sup.2在式I中具有相同的含义,R.sub.3是氢或甲基,m为0、1或2,但当R.sub.3为氢时,n和m相差1,当R.sub.3为甲基时,n和m相差2。