申请人:Yanagihara Kazufumi
公开号:US20110124884A1
公开(公告)日:2011-05-26
To provide a novel process for producing a 2-aryl-3-hydroxy-4-substituted carbonyl thiophene compound or an intermediate thereof useful as an intermediate for production of medicines and agricultural chemicals.
A 2-aryl acetate compound represented by the formula (1):
wherein R
1
is an aryl group or the like, R
4
is a C
1-3
alkyl group or the like, and X is a leaving group, is reacted with a thioacetic acid compound to form a thioacetyl compound (3), the thioacetyl compound (3) is reacted with a vinyl ketone compound to form a γ-ketosulfide compound (5), which is cyclized under basic conditions to form a dihydrothiophene compound (6), and the dihydrothiophene compound (6) is oxidized by using an oxidizing agent to produce a 2-aryl-3-hydroxy-4-substituted carbonyl thiophene compound (7).
提供一种新型方法,用于生产用作药物和农药中间体的2-芳基-3-羟基-4-取代羰基噻吩化合物或其中间体。将式(1)代表的2-芳基乙酸酯化合物:其中R1是芳基或类似物,R4是C1-3烷基或类似物,X是离去基团,与硫代乙酸化合物反应形成硫代乙酰化合物(3),硫代乙酰化合物(3)与乙烯基酮化合物反应形成γ-酮磺醚化合物(5),在碱性条件下环化形成二氢噻吩化合物(6),使用氧化剂氧化二氢噻吩化合物(6)以产生2-芳基-3-羟基-4-取代羰基噻吩化合物(7)。