申请人:Asahi Glass Co., Ltd.
公开号:EP2055692A1
公开(公告)日:2009-05-06
The present invention relates to a process for producing a 2-fluoro-6-halophenol as an intermediate; a process for producing a 2-alkoxy-3-fluorophenol and further a 1,2-dialkoxy-3-fluorobenzene from the 2-fluoro-6-halophenol; a second process for producing a 1,2-dialkoxy-3-fluorobenzene from the 2-fluoro-6-halophenol; and a 2-alkoxy-3-fluorophenol. The 2-fluoro-6-halophenol can be obtained using a 2-fluorophenol as a starting material and through a sulfonation reaction, a halogenation reaction, and a deprotection reaction. The 2-fluoro-6-halophenol is alkyl-etherified, and subsequently the halogen atom is converted into a hydroxyl group to obtain the 2-alkoxy-3-fluorophenol, which is further alkyl-etherified to thereby obtain the 1,2-dialkoxy-3-fluorobenzene. Alternatively, a 1,2-dialkoxy-3-fluorobenzene is also obtained by converting the halogen atom of the 2-fluoro-6-halophenol into a hydroxyl group to thereby form 3-fluorocatechol and subsequently alkyl-etherifying two hydroxyl groups thereof. The processes of the invention realize low production costs and high process yields, and thus are suitable for industrial production of a 1,2-dialkoxy-3-fluorobenzene.
本发明涉及一种以 2-氟-6-卤苯酚为中间体的生产工艺;一种以 2-氟-6-卤苯酚为中间体生产 2-烷氧基-3-氟苯酚并进一步生产 1,2-二烷氧基-3-氟苯的工艺;一种以 2-氟-6-卤苯酚为中间体生产 1,2-二烷氧基-3-氟苯的第二种工艺;以及一种 2-烷氧基-3-氟苯酚。以 2-氟苯酚为起始原料,通过磺化反应、卤化反应和脱保护反应,可以得到 2-氟-6-卤苯酚。将 2-氟-6-卤苯酚进行烷基醚化,然后将卤原子转化为羟基,得到 2-烷氧基-3-氟苯酚,再对其进行烷基醚化,从而得到 1,2-二烷氧基-3-氟苯。或者,也可以通过将 2-氟-6-卤苯酚的卤原子转化为羟基,从而形成 3-氟邻苯二酚,然后将其中的两个羟基烷基醚化,得到 1,2-二烷氧基-3-氟苯。本发明的工艺实现了低生产成本和高工艺收率,因此适用于 1,2-二烷氧基-3-氟苯的工业生产。