申请人:John Wyeth & Brother Limited
公开号:US04463177A1
公开(公告)日:1984-07-31
m-Hydroxyphenyl substituted compounds of formula ##STR1## where R is an organic radical and R.sup.1 is hydroen or an organic radical are prepared by dehydrohalogenating a compound of formula ##STR2## (where X is chlorine or bromine, and R and R.sup.1 have the above meanings). Preferred novel starting materials of formula (II) are of the formula ##STR3## (where R.sup.1 and X are as above, n is 2,3 or 4, R.sup.2 is hydrogen or lower alkyl and R.sup.3 is hydrogen, lower alkyl, lower alkenyl, lower alkynyl, cycloalkyl(lower)alkyl or aryl(lower)alkyl).
公式为##STR1##其中R为有机基团,R.sup.1为氢或有机基团的m-羟基苯基取代化合物可以通过脱卤化式##STR2##(其中X为氯或溴,R和R.sup.1具有上述含义)制备。公式(II)的首选新型起始材料为##STR3##(其中R.sup.1和X如上所述,n为2、3或4,R.sup.2为氢或低碳基,R.sup.3为氢、低碳基、低烯基、低炔基、环烷基(低)烷基或芳基(低)烷基)。