Exploiting Nitroreductases for the Tailored Photoenzymatic Synthesis of Structurally Diverse Heterocyclic Compounds

Author:

Prats Luján Alejandro1,Faizan Bhat Mohammad1,Acosta Marko Edgar Eduardo1,Fodran Peter1ORCID,Poelarends Gerrit J.1ORCID

Affiliation:

1. Department of Chemical and Pharmaceutical Biology Groningen Research Institute of Pharmacy University of Groningen Antonius Deusinglaan 1 9713 AV Groningen The Netherlands

Abstract

AbstractN‐heterocyclic compounds have a broad range of applications and their selective synthesis is very appealing for the pharmaceutical and agrochemical industries. Herein we report the usage of the flavin‐dependent nitroreductase BaNTR1 for the photoenzymatic synthesis of various anthranils and quinolines from retro‐synthetically designed o‐nitrophenyl‐substituted carbonyl substrates, achieving high conversions (up to >99 %) and good product yields (up to 96 %). Whereas the effective production of anthranils required the inclusion of H2O2 in the reaction mixtures to accumulate the needed hydroxylamine intermediates, the formation of quinolines required the use of anaerobic or reducing conditions to efficiently generate the essential amine intermediates. Critical to our success was the high chemoselectivity of BaNTR1, performing selective reduction of the nitro group without reduction of the carbonyl moiety or the activated carbon‐carbon double bond. The results highlight the usefulness of an innocuous chlorophyll‐ and nitroreductase‐based photoenzymatic system for the tailored synthesis of diverse N‐heterocycles from simple nitro compounds.

Publisher

Wiley

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