Synthesis of 6-bromo-2-arylindoles using 2-iodobenzoic acid as precursor
摘要:
The synthesis of 6-bromo-2-arylindoles starting from readily available 2-iodobenzoic acid is presented. Regioselective bromination of the latter was followed by Curtius rearrangement and trapping of the isocyanate with benzyl alcohol led to the benzyl carbamate of 2-iodo-5-bromoaniline. Chemoselective Sonogashira coupling of this compound with arylacetylenes followed by TBAF induced 5-endo-dig cyclization gave the desired bromo indoles. The method allows selective introduction of a bromine atom at the indole C-6 position. (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis of 6-bromo-2-arylindoles using 2-iodobenzoic acid as precursor
作者:Ismael Valois-Escamilla、Alejandro Alvarez-Hernandez、Luis Felipe Rangel-Ramos、Oscar Rodolfo Suárez-Castillo、Francisco Ayala-Mata、Gerardo Zepeda-Vallejo
DOI:10.1016/j.tetlet.2011.05.040
日期:2011.7
The synthesis of 6-bromo-2-arylindoles starting from readily available 2-iodobenzoic acid is presented. Regioselective bromination of the latter was followed by Curtius rearrangement and trapping of the isocyanate with benzyl alcohol led to the benzyl carbamate of 2-iodo-5-bromoaniline. Chemoselective Sonogashira coupling of this compound with arylacetylenes followed by TBAF induced 5-endo-dig cyclization gave the desired bromo indoles. The method allows selective introduction of a bromine atom at the indole C-6 position. (C) 2011 Elsevier Ltd. All rights reserved.
Structure Guided Design, Synthesis, and Biological Evaluation of Oxetane-Containing Indole Analogues
作者:Wen Ren、Rebecca Vairin、Jacob D. Ward、Ricardo Francis、Jenny VanNatta、Ruoli Bai、Pouguiniseli E. Tankoano、Yuling Deng、Ernest Hamel、Mary Lynn Trawick、Kevin G. Pinney
DOI:10.1016/j.bmc.2023.117400
日期:2023.9
mechanism of action as both an antiproliferative agent and a tumor-selective vascular disrupting agent. Replacement of the bridging ketone moiety in OXi8006 with an oxetane functional group has expanded structure activity relationship (SAR) knowledge and provided insights regarding oxetane incorporation within this class of molecules. A new synthetic method using an oxetane-containing tertiary alcohol subjected