Aromatic esters and thioesters of the formula ##STR1## are useful in human and veterinary medicine and in cosmetic formulations. In the formula, X represents oxygen or sulfur, r' and 4" represent hydrogen, lower alkyl, monohydroxyalkyl, polyhydroxyalkyl, aryl or benzyl optionally substituted, the residue of an amino acid or aminated sugar, or taken together form a heterocycle, R.sub.2 represents .alpha., .alpha.'- dissubstituted alkyl having 4-12 carbon atoms or mono- or polycyclic cycloalkyl having 5-12 carbon atoms whose carbon linking carbon is trisubstituted and R.sub.3 and R.sub.4 represent hydrogen or lower alkyl.
芳香酯和巯酯的
化学式为##STR1##,在人类和兽医学以及化妆品配方中具有用途。在该
化学式中,X代表氧或
硫,r'和r"代表氢、低碳烷基、单羟基烷基、多羟基烷基、芳基或苄基(可选择性取代)、
氨基酸残基或
氨基糖残基,或者一起形成一个杂环,R.sub.2代表具有4-12个碳原子的α,α'-二取代烷基或具有5-12个碳原子的单环或多环环烷基,其碳键合碳是三取代的,R.sub.3和R.sub.4代表氢或低碳烷基。