申请人:Bayer Aktiengesellschaft
公开号:US05302742A1
公开(公告)日:1994-04-12
N-acylated p-amino-phenols can be prepared by catalytical hydrogenation of the underlying aromatic nitro compounds in a reaction medium of aqueous sulfuric acid in the sense of a Bamberger type reaction at elevated temperature, optionally in the presence of a water-miscible organic solvent, and subsequent reaction of this reaction mixture with an acid chloride, optionally in the presence of an acid binder and optionally in the presence of a diluent.
N-酰化的对氨基酚可以通过在高温下在含水硫酸反应介质中进行Bamberger型反应的芳香族硝基化合物的催化氢化制备,可选地在水溶性有机溶剂的存在下,并随后将该反应混合物与酸氯化物反应,可选地在酸性粘合剂和稀释剂的存在下。