Fluoro-olefins. Part VIII. Preparation and some reactions of perfluoro-2,3-dimethylbut-2-ene and of some tristrifluoromethyl ethylenes
作者:Henry H. Evans、Roy Fields、Robert N. Haszeldine、Michael Illingworth
DOI:10.1039/p19730000649
日期:——
single-stage preparation of perfluoro-2,3-dimethylbut-2-ene involves the high-temperature reaction of trifluoroiodomethane with perfluorobut-2-yne. Hexafluoro-2-iodo-3-trifluoromethylbut-2-ene, formed at lower temperature from the butyne and trifluoroiodomethane, gives perfluoro-2-methylbut-2-ene by reaction with fluoride ion, and 2H-perfluoro-3-methylbut-2-ene by reduction with zinc and hydrochloric
全氟-2,3-二甲基丁-2-烯的单步制备涉及三氟碘甲烷与全氟丁-2-炔的高温反应。由丁炔和三氟碘甲烷在较低温度下形成的六氟-2-碘-3-碘-3-三氟甲基丁-2-烯通过与氟离子和2 H-全氟-3-甲基丁-反应生成全氟-2-甲基丁-2-烯。用锌和盐酸还原2-烯。从纯电子方面的考虑,这些烯烃与亲核试剂的高反应性明显降低了,显然是由于位阻。除了全氟-2-甲基丁-2-烯,烯烃仅在碱的存在下与甲醇反应。碘代烯烃在高温下与铜-青铜反应,生成配制成全氟-2,3,4,5-四甲基六-2-,4-二烯的偶联产物。