Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Synthetic Methodology, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands.
Department of Chemistry, Life Sciences and Environmental Sustainability (SCVSA), University of Parma, Parco Area delle Scienze 17A, 43124 Parma, Italy.
Org Lett. 2021 Mar 19;23(6):2042-2047. doi: 10.1021/acs.orglett.1c00178. Epub 2021 Mar 2.
Katritzky salts have emerged as effective alkyl radical sources upon metal- or photocatalysis. These are typically prepared from the corresponding triarylpyrylium ions, in turn an important class of photocatalysts for small molecules synthesis and photopolymerization. Here, a flow method for the rapid synthesis of both pyrylium and Katrizky salts in a telescoped fashion is reported. Moreover, several pyrylium salts were tested in the photoinduced RAFT polymerization of vinyl ethers under flow and batch conditions.
Katritzky 盐在金属或光催化作用下已成为有效的烷基自由基源。这些盐通常是由相应的三芳基吡喃鎓离子制备的，而三芳基吡喃鎓离子又是小分子合成和光聚合的一类重要光催化剂。在此，报道了一种快速合成吡喃鎓盐和 Katritzky 盐的连续流方法。此外，还在连续流和分批条件下测试了几种吡喃鎓盐在乙烯基醚的光引发 RAFT 聚合中的应用。
