while equal amounts of both diastereoisomers were formed in the case of (E)-1-phenyl-1-propene and acenaphthylene. In the phenyl-substituted benzocyclene series the stereochemistry of fluoro-alkoxylation was found to be dependent on ring size and on the structure of the alcohol. The resulting vicinal fluoroalkoxy adducts were transformed by heating in aqueous HBr to 2-fluoro-1-phenylbenzocyclenes. Correlation
在各种醇存在下,苯基取代的烯烃与 SelectfluorTM
氟化试剂 F-
TEDA-
BF4 的反应导致形成具有 Markovnikov 类型区域选择性的邻位氟烷氧基加合物。发现
氟甲氧基加成反应的立体
化学在 (Z)-茋、
茚和二苯并
丁二烯酮的情况下略占优势,而在 (E)-1-苯基的情况下形成等量的两种非对映异构体-
1-丙烯和
苊。在苯基取代的苯并环烯系列中,发现氟烷氧基化的立体
化学取决于环的大小和醇的结构。所得的邻位氟烷氧基加合物通过在 HBr
水溶液中加热转化为 2-
氟-1-苯基苯并环烯。