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. 2021 Mar 10;14(8):1781–1804. doi: 10.1002/cssc.202100159

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© 2021 The Authors. ChemSusChem published by Wiley-VCH GmbH

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Scheme 4 — Regioselective carboxylation of heteroaromatics: (a) Carboxylation of pyrrole by pyrrole‐2‐carboxylate decarboxylase from Bacillus megaterium (P2CDC_Bm). ^[44] (b) Carboxylation of indole by indole‐3‐carboxylate‐decarboxylase from Arthrobacter nicotianae (I3CDC_At). ^[46] (c) Carboxylation of furoic acid to yield 2,5‐furandicarboxylic acid (FDCA) catalyzed by reversible prFMN‐dependent decarboxylase HmfF ^[42] (d) (de)carboxylation of benzo‐fused O‐, N‐, and S‐containing heteroaromatic carboxylic acids catalyzed by evolved AnFdc variants (I327S or I327N). ^[43] AnFdc=Aspergillus niger ferulic acid decarboxylase.