申请人:Qiu Mingjian
公开号:US20090227817A1
公开(公告)日:2009-09-10
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.
本发明涉及一种生产2-氟-6-卤苯酚作为中间体的过程;一种从2-氟-6-卤苯酚生产2-烷氧基-3-氟苯酚,进而从中生产1,2-二烷氧基-3-氟苯的过程;一种从2-氟-6-卤苯酚生产1,2-二烷氧基-3-氟苯的第二过程;以及2-烷氧基-3-氟苯酚。可以使用2-氟苯酚作为起始原料,通过磺化反应、卤代反应和去保护反应获得2-氟-6-卤苯酚。将2-氟-6-卤苯酚烷基醚化,随后将卤原子转化为羟基以获得2-烷氧基-3-氟苯酚,进一步烷基醚化以获得1,2-二烷氧基-3-氟苯。另外,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,随后烷基醚化两个羟基,也可以获得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产率,因此适用于工业生产1,2-二烷氧基-3-氟苯。