Methods and intermediates for introducing the two blocking side chains, 2-hydroxy- 3-isopropyl or tert.- butylaminopropyl, into aromatic nuclei containing a phenolic hydroxyl group by condensing a 5-halomethyl-3-isopropyl or 3-tert. -butyl-2-oxazolidinone with an aromatic compound containing a phenolic hydroxy group in the presence of an acid binding agent at 80-150°C then subsequently splitting the oxazolidinone ring using an alkali metal hydroxide or lower alkoxide at a temperature in the range of 100-150°C in an organic solvent
将 2-羟基-3-异丙基或 3-叔丁基
氨基丙基这两条阻断侧链引入含有
酚羟基的芳香族核的方法和中间体,方法是在酸结合剂存在下,于 80-150°C 将 5-甲基-3-异丙基或 3-叔丁基-
2-噁唑烷酮与含有
酚羟基的芳香族化合物缩合,然后在 100-150°C 的温度范围内,在有机溶剂中使用碱
金属氢氧化物或低级烷氧化物拆分
噁唑烷酮环