Kationische umlagerung von norbornadiendimeren in den kaefigkohlenwasserstoff heptacyclo (9,3,01,11, 02,6, 03,10, 04,8, 07,14, 09,13) tetradecan.

Norbornadiene as a Universal Substrate for Organic and Petrochemical Synthesis

“…It is interesting, that the character of cycloaddition can be changed completely through adding an equimolar quantity of BF 3 •OEt 2 : in CH 2 Cl 2 , the only product is [4π+4π]-isomer 11 (Binor-S). When twocomponent systems like Fe(acac) 3 -AlEt 3 are used, a mixture of dimers 1, 3, 7 è 9 is usually formed [12]. The content of isomers depends on the solvent type and how the catalyst was synthesized [13][14].…”