Reactions of polyfluoroaromatic compounds with electrophilic agents. Part 20. Nitrofluorination of pentafluorophenoxydifluoromethane and decafluorodiphenyl ether
作者:A.A. Shtark、V.D. Shteingarts
DOI:10.1016/s0022-1139(00)82797-9
日期:1992.7
3-nitrocyclohexa-1,4-dienes. The formation of the diene with a CFOR fragment, arising from nitronium cation addition to the para position, has been shown to be reversible in the case of R=CHF2, unlike that from reaction at the ortho position which afforded the diene containing a CF2 ring fragment.
当在无水HF中用HNO 3进行硝基氟化时,五氟酚醚C 6 F 5 OR(R = CHF 2,C 6 F 5)将硝基阳离子加至相对于取代基的对位和邻位,或最终形成相应的3 -硝基环己-1,4-二烯。已证明在R = CHF 2的情况下,由硝基阳离子加成对位而形成的带有CFOR片段的二烯是可逆的,这与邻位反应可得到含的二烯不同。 CF 2 环片段。