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. 2020 Feb 18;25(4):905. doi: 10.3390/molecules25040905

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Scheme 3 — Na(2-EH) activated borylation of furan and thiophene derivatives using dmpe₂FeCl₂ 1. ^a Yields determined by ¹H-NMR spectroscopy of the crude reaction mixtures using 1,3,5-trimethoxybenzene as an internal standard. Product ratios were determined by ¹H-NMR spectroscopy of the crude reaction mixtures. ^b Values represent the ratio of 2-boryl:3-boryl:bis-boryl products.