申请人:BASF Aktiengesellschaft
公开号:US04187227A1
公开(公告)日:1980-02-05
2,4-Dioxo-oxazolidines are manufactured by reacting aromatic amines with .alpha.-hydroxycarboxylic acid of the formula ##STR1## where R.sup.1 and R.sup.2 have the above meanings, Hal is halogen, preferably chlorine, and R.sup.4 is alkyl of 1 to 4 carbon atoms in the presence of a base, preferably at 20-120.degree. C.
2,4-二氧代噁唑烷是通过在碱的存在下,将芳香胺与式为##STR1##的α-羟基羧酸反应制得,其中R.sup.1和R.sup.2具有上述含义,Hal是卤素,优选氯,而R.sup.4是1到4个碳原子的烷基,反应温度为20-120℃。