PROCESS FOR PRODUCING 3,4-DIHYDROXY-3-CYCLOBUTENE-1,2-DIONE
申请人:Kyowa Yuka Co., Ltd.
公开号:EP1010684A1
公开(公告)日:2000-06-21
The present invention provides a method for manufacturing 3,4-dihydroxy-3-cyclobutene-1,2-dione represented by the following general formula (III) (usual name: "squaric acid") through the following reaction processes 1 ∼ 4, using a vinyl ether represented by the following general formula (V) and a halogenoacetyl halide represented by the following general formula (VI) as starting materials.
[wherein, R1 represents an alkyl group; and R2, R3, R4, and X are the same or different and each represents halogen]
本发明提供了一种以下述通式(V)代表的乙烯基醚和下述通式(VI)代表的卤代乙酰卤为起始原料,通过下述反应过程1∼4制造下述通式(III)代表的3,4-二羟基-3-环丁烯-1,2-二酮(通常名称:"方酸")的方法。
[其中,R1 代表烷基;R2、R3、R4 和 X 相同或不同,且各自代表卤素。]
Method for manufacturing 3-alkoxy-2-halogenocyclobutanone derivatives
申请人:Kyowa Yuka Co., Ltd.
公开号:EP1676827A2
公开(公告)日:2006-07-05
The present invention provides a method for manufacturing 3-alkoxy-2-halogenocyclobutanone derivatives represented by the following general formula (IV) through the following reaction, using a vinyl ether represented by the following general formula (V) and a halogenoacetyl halide represented by the following general formula (VI) as starting materials,
wherein R1 represents an alkyl group and R2, R3, and R4 are the same or different and each represents a halogen atom.
Process for producing 3,4-dihydroxy-3-cyclobutene-1,2-dione
申请人:Kyowa Yuka Co., Ltd.
公开号:US06331653B1
公开(公告)日:2001-12-18
The present invention provides a method for manufacturing 3,4-dihydroxy-3-cyclobutene-1,2-dione represented by the following general formula (III) (usual name: “squaric acid”) through the following reaction processes 1˜4, using a vinyl ether represented by the following general formula (V) and a halogenoacetyl halide represented by the following general formula (VI) as starting materials.
[wherein, R1 represents an alkyl group; and R2, R3, R4, and X are the same or different and each represents halogen]