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Synthesis 2018; 50(05): 1007-1014
DOI: 10.1055/s-0036-1591879
DOI: 10.1055/s-0036-1591879
feature
Unsaturated Aryl and Heteroaryl N1-Tetrazoles from 1-Allyl-1H-tetrazole
Further Information
Publication History
Received: 30 October 2017
Accepted after revision: 01 December 2017
Publication Date:
11 January 2018 (online)
Abstract
Unsaturated aryl- and heteroaryl N1-substituted tetrazoles have been exceedingly difficult to access but are nonetheless highly attractive for the preparation of novel multifunctional spin crossover materials. The development of a Heck cross-coupling protocol, featuring good substrate tolerance for aromatic and heteroaromatic substrates overcoming this synthetic challenge is presented. The combination of aqueous THF, triethylamine, and PdCl2/P(o-tolyl)3 gave fast reaction rates and good yields. Competition experiments with styrene evidenced a slight preference for reaction with 1-allyl-1H-tetrazole.
Key words
heterocycles - N1-substituted tetrazoles - Heck reaction - cross-coupling - C–C bond formation - aqueous conditions - spin crossoverSupporting Information
- Supporting information for this article is available online at https:<//doi.org/10.1055/s-0036-1591879.
- Supporting Information
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