Gram‐Scale Synthesis of the 1,1,
<i>n</i>
,
<i>n</i>
‐Tetramethyl[
<i>n</i>
](2,11)teropyrenophanes
作者:Kiran Sagar Unikela、Parisa Ghods Ghasemabadi、Václav Houska、Louise N. Dawe、Yuming Zhao、Graham J. Bodwell
DOI:10.1002/chem.202003828
日期:2021.1.4
A gram‐scale synthesis of a series of 1,1,n,n‐tetramethyl[n](2,11)teropyrenophanes (n=7–9) has been accomplished as well as the first synthesis of the next higher homologue 1,1,10,10‐tetramethyl[10](2,11)teropyrenophane. The scale‐up of the original small‐scale synthesis required the development of several heavily modified synthetic methods, including a chlorination/Friedel–Crafts alkylation protocol
一系列1,1,n,n-四甲基[ n ](2,11)萜品庚烯(n =7–9)以及下一个更高的同系物1,1,10,10-四甲基[10](2,11)邻苯二甲醛的首次合成已经完成。原始小规模合成的放大规模要求开发几种经过重大改进的合成方法,包括氯化/弗里德尔-克来福特烷基化方案和碘化/ Wurtz偶联方案,它们分别在25-30 g和30-60上进行g鳞片。在合成途径结束时,为关键的萜烯形成环脱氢反应开发了两套独立的条件,一种用于两个不太紧张的同类物的酸促进方法,另一个用于两个紧张的同系物的无酸方法。