Using Methanol as a Formaldehyde Surrogate for Sustainable Synthesis of
<scp>
<i>N</i>
‐Heterocycles
</scp>
via
<scp>Manganese‐Catalyzed</scp>
Dehydrogenative Cyclization
作者:Zhihui Shao、Shanshan Yuan、Yibiao Li、Qiang Liu
DOI:10.1002/cjoc.202100886
日期:2022.5.15
The development of an efficient and sustainable synthetic route for formaldehyde production from renewable feedstock, especially in combination with a subsequent transformation to straightforwardly construct valuable chemicals, is highly desirable. Herein, we report a novel manganese-catalyzed dehydrogenativecyclization of methanol as a formaldehyde surrogate with a variety of dinucleophiles for facile
Construction of pyrrole- and indole-fused CF3-piperazine derivatives
作者:Yu-Ting Tian、Yu-Wei Zong、Jing Nie、Fa-Guang Zhang、Jun-An Ma
DOI:10.1016/j.jfluchem.2019.109361
日期:2019.10
yields with excellent chemoselectivities via a Pictet-Spenglerreaction under mild and operationally simple conditions. The synthetic utility of this protocol was further extended by the facile preparation of indole-fused CF3-1,4-diazocane and enantioenriched CF3-piperazines via a vinylogous Pictet-Spenglerreaction and an asymmetricPictet-Spenglerreaction, respectively.
Despite significant advances made on the synthesis of indole derivatives through photochemical strategies during the past several years, the requirement of equivalent amounts of oxidants, bases or other additional additives has limited their practical applications in the synthesis of natural products and pharmaceuticals as environment-friendly processes. Herein, we report LED visible-light-induced
尽管在过去几年中通过光化学策略合成吲哚衍生物取得了重大进展,但对等量氧化剂、碱或其他添加剂的要求限制了它们在天然产物和药物合成中作为环保工艺的实际应用. 在此,我们报告了 LED 可见光诱导的氧化还原中性脱磺基 C(sp 2 )-H 官能化,在没有任何额外添加剂的情况下,在温和条件下通过 γ-碎裂合成具有广泛范围的N取代吲哚。在氘标记实验、动力学分析、Hammett绘图分析和DFT计算的基础上,研究了反应机理范式。
HENDI, S. B.;BASANAGOUDAR, L. D., INDIAN J. CHEM., 1981, 20, N 4, 285-287