Intramolecular monomer-on-monomer (MoM) Mitsunobu cyclization for the synthesis of benzofused thiadiazepine-dioxides
作者:Pradip K. Maity、Quirin M. Kainz、Saqib Faisal、Alan Rolfe、Thiwanka. B. Samarakoon、Fatima Z. Basha、Oliver Reiser、Paul R. Hanson
DOI:10.1039/c1cc14807a
日期:——
The utilization of a monomer-on-monomer (MoM) intramolecular Mitsunobu cyclization reaction employing norbornenyl-tagged (Nb-tagged) reagents is reported for the synthesis of benzofused thiadiazepine-dioxides. Facile purification was achieved viaring-opening metathesis (ROM) polymerization initiated by one of three metathesis catalyst methods: (i) free metathesis catalyst, (ii) surface-initiated catalyst-armed silica, or (iii) surface-initiated catalyst-armed Co/C magnetic nanoparticles.
本研究采用降冰片烯标记(Nb-tagged)试剂,利用单体对单体(MoM)分子内 Mitsunobu 环化反应合成苯并二氮杂卓-二氧杂环。通过以下三种元合成催化剂方法中的一种:(i) 游离元合成催化剂;(ii) 表面引发的催化剂铠装二氧化硅;或 (iii) 表面引发的催化剂铠装 Co/C 磁性纳米粒子,实现了viaring-opening元合成(ROM)聚合反应的简便纯化。