Regioselective synthesis of di-aromatic ring-fused 2,8-dioxa/dithia bicyclo[3,3,1]nonane derivatives via recyclable polymeric Brønsted acid-catalyzed one-pot tandem formation of multiple chemical C–C/C–O and C–C/C–S bonds
作者:Ali Rahmatpour、Seyed Mehrzad Sajjadinezhad、Ahmad Mirkani、Behrouz Notash
DOI:10.1016/j.tet.2021.132341
日期:2021.8
diverse symmetrical substituted di-aromatic-fused 2,8-dioxa/dithiabicyclo[3,3,1]nonane derivatives containing methylene-bridged bicyclic framework via reusable cross-linked polystyrene-supported p-toluenesulfonic acid-catalyzed tandem reactions of substituted phenols/selected thiophenol with 1,1,3,3-tetramethoxypropane under neat conditions has been reported in which four new chemical bonds (two C–C/two C–O)-(two
一种环境友好且直接的合成方法,用于通过可重复使用的交联组装含有亚甲基桥联双环骨架的新型不同对称取代二芳族稠合 2,8-二氧杂环己烷/二硫杂双环 [3,3,1]壬烷衍生物聚苯乙烯支撑的p-甲苯磺酸催化取代苯酚/选定的苯硫酚与 1,1,3,3-四甲氧基丙烷在纯净条件下的串联反应,其中四个新的化学键(两个 C-C/两个 C-O)-(两个 C –C/两个 C–S)、两个新的六元循环和两个新的立体三元碳中心在一次操作中构建。还证明了该方法的综合效用。此外, 本协议可以成功地扩展到选定的萘酚和二羟基萘作为酚类的烯醇伙伴, 效率很高。所开发的转化效率高、使用商业上可获得的原料、优异的区域选择性、操作简单、克级合成和良好的官能团兼容性。此外,在无溶剂条件下,