Synthesis of diversely functionalized quinoline-2-carboxylates is illustrated through electrochemical cross-dehydrogenative coupling between N-aryl glycinates and methylenecyclopropanes. An extensive range of distinct functionalities is well-compatible under these transition-metal- and oxidant-free mild electrochemical conditions, contributing to a broad substrate scope and practical applicability
Ethyl cellulose derived porous iron@N-doped carbon material for N–H carbene insertion reaction
作者:Yamei Lin、Fei Wang、Guo-Ping Lu、Xing Zhang
DOI:10.1016/j.tet.2021.132432
日期:2021.10
and carbon source respectively, has been disclosed for the synthesis of Fe/N-codoped carbon materials. This material exhibits excellent catalytic efficiency towards N–H carbeneinsertion reaction for the synthesis of unnatural amino acid derivatives. Fe/FeOx nanoparticles tranfer electrons to N-doped carbon owing to the Mott-Schottky Effect, which is beneficial to the formation of iron carbene intermediate
已经公开了一种新开发的、简便且可持续的策略,其中锌盐、三聚氰胺和乙基纤维素分别用作成孔剂、氮和碳源,用于合成 Fe/N 共掺杂碳材料。该材料对用于合成非天然氨基酸衍生物的 N-H 卡宾插入反应表现出优异的催化效率。Fe/FeO x纳米颗粒由于莫特-肖特基效应将电子转移到 N 掺杂的碳上,这有利于铁卡宾中间体的形成。N 掺杂可以提供更多的路易斯碱位,从而促进质子转移过程。Fe/FeO x纳米粒子涂有石墨碳,从而避免了这种材料中铁位的损失和失活。因此,这种材料可以重复使用至少四次,而不会显着降低活性。
Metal‐Free Electrochemical [3+2] Cycloaddition between <i>α</i>‐Amino Carbonyls and Tosylmethyl Isocyanide <i>en route</i> to Substituted Imidazoles
作者:Samrat Mallick、Mrinmay Baidya、Suman De Sarkar
DOI:10.1002/adsc.202301071
日期:2024.1.30
essential requirement of transition metal catalysts and chemical oxidants. A wide variety of different functionalities are well tolerated under this reaction condition, contributing to the substrate scope and applicability. Several control experiments and cyclic voltammetry studies suggest an electro-oxidation triggered successive C−C and C−Nbondformations followed by rapid aromatization for constructing