An InCl3 catalyzed facile one-pot synthesis of novel dispiro[cyclopent-3′-ene]bisoxindoles
摘要:
An InCl3 catalyzed efficient synthesis of novel dispiro[cyclopent-3'-ene]bisoxindoles is accomplished via a one-pot reductive cyclization of isatylidene malononitriles using the Hantzsch ester. (C) 2008 Elsevier Ltd. All rights reserved.
Engaging thieno[2,3‐b]indole‐2,3‐dione for the efficient synthesis of spiro[indoline‐3,4′‐thiopyrano[2,3‐b]indole] by reaction with
<i>N</i>
‐substituted isatilidenes
作者:Noble V. Thomas、Vidya Sathi、Ani Deepthi、Sruthi Leena、Sidharth Chopra
DOI:10.1002/jhet.4147
日期:2021.1
A simple and efficient method, proceeding through a new mechanistic pathway, for the synthesis of spiro[indoline‐3,4‐thiopyrano[2.3‐b]indole derivatives have been developed by exploiting the reaction of thieno[2,3‐b]indole‐2,3‐dione with N‐substituted isatilidenes. The compounds synthesized have been screened for antibacterial activity. The generality of the reaction and mechanistic rationale are presented
The iron-catalyzed cross-dehydrogenative coupling (CDC) of C(sp3)–H/C(sp3)–H bonds to afford olefins by 4H elimination is described. This method employs air (molecular oxygen) as an ideal oxidant, and is performed under mild, ligand-free and base-free conditions. H2O is the only byproduct. Good tolerance of functional groups and high yields have also been achieved. Preliminary mechanistic investigations
A green and highly efficient iron‐catalyzed one‐pot oxidation/Knoevenagel tandem reaction for the synthesis of α, β‐unsaturated nitriles from secondary alcohols and malononitrile has been achieved. The reaction performed under mild conditions with air as an oxidant, and provided the corresponding oxidation/Knoevenagel prudocts in good to excellent yields within short times avoiding the use of noble
Stereoselective construction of Bi-spirooxindole frameworks via a Michael addition/cyclization and an unexpected redox/oxidative coupling/cyclization
作者:Xiao-Qian Zhu、Jia-Shou Wu、Jian-Wu Xie
DOI:10.1016/j.tet.2016.11.001
日期:2016.12
fulfilled by using 3-hydroxyoxindole derivatives as the hydrogen source and the oxidative coupling happened by using simple and green molecular oxygen as the oxidant. The plausible mechanisms for the unexpected redox/oxidative coupling/cyclization were also given.