A New Rotane Family: Synthesis, Structure, Conformation, and Dynamics of [3.4]-, [4.4]-, [5.4]-, and [6.4]Rotane<sup>1</sup>
作者:Lutz Fitjer、Christoph Steeneck、Said Gaini-Rahimi、Ulrike Schröder、Karl Justus、Peter Puder、Martin Dittmer、Carla Hassler、Jörg Weiser、Mathias Noltemeyer、Markus Teichert
DOI:10.1021/ja973118x
日期:1998.1.1
The synthesis, structure, conformation, and dynamics of a new rotane family consisting of four-membered rings are described. All syntheses are based on bicyclobutylidene (9): [2+1] cycloaddition of cyclobutylidene yields [3.4]rotane (5) (9−5), [2+2] cycloaddition of trimethyleneketene followed by spiroalkylation of the resulting trispiroketone 10 yields [4.4]rotane (6) (9−10−13−14−6), homologization
描述了由四元环组成的新 rotane 家族的合成、结构、构象和动力学。所有合成均基于双环丁叉 (9):环丁叉的 [2+1] 环加成生成 [3.4] 轮烷 (5) (9-5),三亚甲基乙烯酮的 [2+2] 环加成,然后将所得三螺酮 10 进行螺烷基化,生成 [3.4] 4.4]rotane (6) (9-10-13-14-6), 10 通过 β-羟基硒化物的同源化可以得到四螺环酮 11 和五螺环酮 12 (10-15-11-16-12), 并进一步详细说明向环丙基卡宾-环丁烯重排产生 [5.4] 轮烷 (7) 和 [6.4] 轮烷 (8) [11(12)-18(24)-19(25)-20(26)-21(27)-22( 28)-23(29)-7(8)]。6, 7, 的结构 和 8 是通过高精度低温 X 射线分析和力场计算确定的,使用搜索程序 HUNTER 与 MM3(92) 相关联。观察到以下特征:从