申请人:Ciba-Geigy Corporation
公开号:US04159387A1
公开(公告)日:1979-06-26
There are described new squaric acid esters, particularly mono-ortho esters, di-ortho esters, ortho ester anhydrides and ortho ester halides of squaric acid; a new process for producing these squaric acid esters; and a process for converting the squaric acid esters into squaric acid. It is possible by the new process to produce, with the use of readily obtainable starting products, the new squaric acid esters according to the invention in an economical manner and with good to very good yields; and the squaric acid esters can be converted under mild reaction conditions into squaric acid.
描述了新的方酸酯,特别是单邻酯、双邻酯、邻酯酸酐和邻酯卤化物的方酸酯;一种生产这些方酸酯的新方法;以及一种将方酸酯转化为方酸的方法。通过这种新方法,可以利用易获得的起始物质经济地生产本发明中的新方酸酯,并获得良好到非常好的产率;并且在温和的反应条件下,方酸酯可以转化为方酸。