A Procedure for Transforming Indoles into Indolequinones
摘要:
A procedure that converts a series of structurally diverse, readily available indole derivatives to their corresponding indolequinones is described. The three-step route commences with an iridium catalyzed C-H borylation to give a 7-borylindole that upon oxidationhydrolysis affords the 7-hydroxyindole. Subsequent oxidation provides the indolequinone.
A highly selective Ir-catalyzed borylation of 2-substituted indoles: a new access to 2,7- and 2,4,7-substituted indoles
作者:Wei Fun Lo、Hanns Martin Kaiser、Anke Spannenberg、Matthias Beller、Man Kin Tse
DOI:10.1016/j.tetlet.2006.11.083
日期:2007.1
The selective CH-functionalization of 2-substituted indoles is presented. Using bis(pinacolato)diboron (2) in the presence of iridium complexes, a novel catalytic mono-borylation is observed preferentially at the 7-position of the indole. This allows for an efficient synthesis of various 2,7-di- and 2,4,7-trisubstituted indoles, which are otherwise difficult to access. The scope and limitation of the method is demonstrated. (c) 2006 Elsevier Ltd. All rights reserved.
A Procedure for Transforming Indoles into Indolequinones
作者:Andrew S. Eastabrook、Christy Wang、Emma K. Davison、Jonathan Sperry
DOI:10.1021/jo502509s
日期:2015.1.16
A procedure that converts a series of structurally diverse, readily available indole derivatives to their corresponding indolequinones is described. The three-step route commences with an iridium catalyzed C-H borylation to give a 7-borylindole that upon oxidationhydrolysis affords the 7-hydroxyindole. Subsequent oxidation provides the indolequinone.
Ir-Catalyzed Functionalization of 2-Substituted Indoles at the 7-Position: Nitrogen-Directed Aromatic Borylation
作者:Sulagna Paul、Ghayoor A. Chotana、Daniel Holmes、Rebecca C. Reichle、Robert E. Maleczka,、Milton R. Smith
DOI:10.1021/ja0631652
日期:2006.12.1
Ir-catalyzed borylation of 2-substituted indoles selectively yields 7-borylated products in good yields. N-Protection, required for previous functionalizations of 2-substituted indoles, is unnecessary.
2-取代吲哚的 Ir 催化硼酸化选择性地以良好的产率产生 7-硼酸化产物。2-取代吲哚的先前功能化所需的N-保护是不必要的。