申请人:NIPPON PETROCHEMICALS COMPANY, LIMITED
公开号:EP0129956A1
公开(公告)日:1985-01-02
A process for converting an aromatic compound to prepare an iodoarene, Ar-1, and an aryl compound in which an unsaturated compound is bonded directly to an aryl group, Ar, which process comprises reacting a diaryliodonium salt represented by general formula (I)
wherein Ar is an aryl group which may be substituted and two Ar's are identical and X⊖ is a counter ion inert to the reaction with the unsaturated compound in a solvent in the presence of a transition metal catalyst and a base or a reducing metal, said reaction being carried out at a temperature not higher than 80°C and/or by using at least one of the base, the reducing metal and the unsaturated compound in an amount not more than 1.5 times the stoichiometric amount, then separating the iodoarene Ar-I thus formed from the reaction mixture, subsequently coupling said iodoarene thus separated with an aromatic compound, ArH. in an oxidizing atmosphere in the presence of X⊖'[ or an anion ion-exchangeable with X0, if needed ion-exchanging the anion with X⊖, to form the diaryl iodonium salt of the above general formula (I), and recycling said diaryl iodonium salt thus formed in said reaction.
一种将芳香族化合物转化以制备碘代芳烃 Ar-1 和芳基化合物的工艺,其中不饱和化合物 直接与芳基 Ar 键合,该工艺包括使通式(I)代表的二芳基碘鎓盐反应
其中 Ar 是可被取代的芳基,且两个 Ar 相同,X⊖ 是与不饱和化合物在溶剂中在过渡金属催化剂和碱或还原金属存在下反应的惰性反离子,所述反应在不高于 80°C 的温度下和/或通过使用碱、还原金属和不饱和化合物中的至少一种,其用量不超过 1.5倍,然后从反应混合物中分离出由此形成的碘芳烃Ar-I,随后在氧化气氛中,在X⊖'[或可与X0离子交换的阴离子(如需要可与X⊖离子交换)的存在下,将由此分离出的所述碘芳烃与芳香族化合物ArH.偶联,形成上述通式(I)的二芳基碘鎓盐,并回收在所述反应中由此形成的所述二芳基碘鎓盐。