Synthesis 2022; 54(05): 1347-1352
DOI: 10.1055/a-1668-9910
paper

Synthesis of Bis(indolyl)methanes through an Alkylation Reaction of Indoles with Sodium Alkoxides

Xue Chen
,
Yunkui Liu
,
Hongwei Jin
,
Bingwei Zhou
We thank the National Natural Science Foundation of China (Nos. 22001231 and 21772176) and the Natural Science Foundation of Zhejiang­ Province (Nos. LQ20B020012 and LY20B020013) for financial support.


Abstract

We describe an alkylation reaction of indoles with sodium alkoxides for the synthesis of bis(indolyl)methanes. 1-Tetralone proved to be an efficient hydrogen acceptor, thus avoiding the use of precious transition metals such as Ru and Ir. This reaction features transition-metal-free conditions, uses readily available starting materials, and can be conducted on a gram scale.

Supporting Information



Publication History

Received: 14 September 2021

Accepted after revision: 14 October 2021

Accepted Manuscript online:
14 October 2021

Article published online:
18 November 2021

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