申请人:MITSUBISHI GAS CHEMICAL COMPANY, INC.
公开号:EP1710239A1
公开(公告)日:2006-10-11
The invention provides a process for producing a chroman compound represented by formula (1) (wherein each of substituents R1 to R6 and X represents a hydrogen atom, a halogen atom, a hydroxyl group, a methoxy group, an ethoxy group, a carboxyl group, a C1 to C12 alkyl group which may have a substituent, a C6 to C12 aryl group which may have a substituent, a C7 to C12 aralkyl group which may have a substituent, or an ester residue; R1 to R4 may be linked to one another; and at least one of the substituents X and R6 is an ester residue), characterized in that the process includes allowing a phenol, an olefin, and a formaldehyde to react in the absence of catalyst and in the presence of water in an amount by mole 1 to 10 times that of the phenol.
According to the present invention, a high-purity chroman compound can be produced in the absence of catalyst and under mild conditions. In addition, the invention provides an industrial means for producing the compound, without using a large amount of an acid or a base serving as a reaction promoter or a catalyst, which would otherwise cause side reactions, apparatus corrosion, etc.
[F1]
本发明提供了一种生产由式(1)代表的色烷化合物的工艺(其中取代基R1至R6和X各自代表氢原子、卤素原子、羟基、甲氧基、乙氧基、羧基、可能具有取代基的C1至C12烷基、可能具有取代基的C6至C12芳基、可能具有取代基的C7至C12芳烷基或酯残基;R1至R4可彼此相连;取代基X和R6中至少有一个是酯残基),其特征在于,该工艺包括在无催化剂和水存在的情况下,使苯酚、烯烃和甲醛发生反应,反应物的摩尔量为苯酚的1至10倍。
根据本发明,可以在无催化剂和温和的条件下生产出高纯度的铬化合物。此外,本发明还提供了一种生产该化合物的工业方法,无需使用大量作为反应促进剂或催化剂的酸或碱,否则会引起副反应、设备腐蚀等。
[F1]