and d,l-diastereomers in six steps from trishomobarrelene 1 via the amine 5, the N,N-bis(trishomobarrelenyl)sulfamide 6 and the 1,2-(trishomobarrelenyl)diazene 7 in 16 % overall yield. Crystals of meso-4 were grown from a pentane solution of the mixture and subjected to an X-ray structure analysis. The (+)- and the (-)-enantiomer were isolated by HPLC on a chiral-phase column. They exhibited significantly
1,1-Bi(endo,exo,syn-pentacyclo[3.3.3.02,4.06,8.09,11]undecyl)[1,1-bi(trishomobarrelenyl)] (4) 已制备为其 1:1 的混合物六步中的内消旋和 d,l-非对映异构体从三苯
异戊二烯 1 到胺 5、N,N-双(三苯
异戊二烯基)磺酰胺 6 和 1,2-(三苯
异戊二烯基)
二氮烯 7,总产率为 16%。meso-4 的晶体从混合物的
戊烷溶液中生长出来并进行 X 射线结构分析。(+)-和(-)-对映异构体通过HPLC在手性相柱上分离。它们表现出显着增强的摩尔旋光度,这与它们骨架中存在三个螺旋排列的 1,2-二环丙基
乙烷单元一致。(+)-对映体的绝对构型基于两种对映体的DFT计算的旋光度被指定为全-(S)。