作者:W. Dmowski、H. Voellnagel-Neugebauer
DOI:10.1016/s0022-1139(00)82614-7
日期:1981.9
Direct chlorination of 2-(2H-hexafluoropropyl)-tetra- hydrofuran 1 gave high yield of 2-(2-chlorohexafluoropropyl)- pentachloro-2,5-dihydrofuran 2. Bromination of 1 gave very complex mixture of products, from which three compounds, viz. 2-bromo-5-(2H-hexafluoropropyl)-furan 3, 3-bromo-5-(2H-hexafluoropropyl)-furan 4, and 2,4-dibromo-5-(2H-hexafluoropropyl)furan 5 were isolated. Exchange fluorination
2-(2H-六氟丙基)-四氢呋喃1的直接氯化反应产生高产率的2-(2-氯六氟丙基)-五氯-2,5-二氢呋喃2溴化反应得到非常复杂的产物混合物,其中三种化合物,即 分离出2-溴-5-(2H-六氟丙基)-呋喃3、3-溴-5-(2H-六氟丙基)-呋喃4和2,4-二溴-5-(2H-六氟丙基)呋喃5。用干燥的KF在240-300°下交换2的氟化作用,导致氟逐步取代氯,得到氯-氟-2-(2-氯六氟丙基)-二氢呋喃7,8,9和10的混合物,以及少量2-(2-氯六氟丙基)-3,4,5-三氯呋喃6。