Regiospecific synthesis of aromatic compounds via organometallic intetmediates. Part 6. 1,3,5-perfluoroalkylether benzenes
作者:Christ Tamborski、Loomis S. Chen
DOI:10.1016/0022-1139(95)03307-0
日期:1995.12
1,3,5-Tribromobenzene can undergo a mono lithium-halogen exchange reaction to yield 3,5-Br2C6H3Li which can subsequently react with a perfluoroalkylether ester, RfORfC(O)OC2H5, yielding the aryl ketone 3,5-Br2C6H3C(O)RfORf. A classical SF4/HF reaction of this ketone yields the perfluoroalkylether benzene, 3,5-Br2C6H3CF2RfORf. This process can be repeated stepwise until all bromines are substituted
1,3,5-三溴苯可以进行单锂-卤素交换反应,生成3,5-Br 2 C 6 H 3 Li,随后可以与全氟烷基醚酯R f OR f C(O)OC 2 H 5反应,得到芳基酮3,5-Br 2 C 6 H 3 C(O)R f OR f。该酮的经典SF 4 / HF反应生成全氟烷基醚苯,3,5-Br 2 C 6 H 3 CF 2 R f OR f。可以逐步重复该过程,直到所有溴被取代,得到最终产物1,3,5-C 6 H 3(CF 2 R f OR f)3。R f OR f被选择为C 3 F 7 O [CF(CF 3)CF 2 O] 2 CF(CF 3)。可以选择其他全氟烷基和全氟烷基醚酯或其他亲电子试剂以与各种有机锂中间体反应。