Synthesis 2020; 52(21): 3111-3128
DOI: 10.1055/s-0040-1707225
short review
© Georg Thieme Verlag Stuttgart · New York

Visible-Light-Mediated Photoredox Reactions in the Total Synthesis of Natural Products

Jeferson B. Mateus-Ruiz
,
Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, Coyoacán, CP 04510, Ciudad de México, México   Email: acordero@unam.mx
› Author Affiliations
Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México (DGAPA-UNAM) for project number IN205318. Consejo Nacional de Ciencia y Tecnología (CONACYT) for project number A1-S-7825 and for a postdoctoral fellowship for J.B.M.-R.
Further Information

Publication History

Received: 06 June 2020

Accepted after revision: 30 June 2020

Publication Date:
18 August 2020 (online)


Abstract

In the last two decades, the field of photoredox catalysis (PRC) has grown impressively with reports of new synthetic methodologies and more efficient versions of known free-radical reactions. The impressive success of visible-light-mediated photoredox catalysis is, in great part, due to its low environmental impact, mild reaction conditions, clean reactions, and inexpensive methodologies. These features have allowed photoredox catalysis to emerge as a powerful tool in the synthesis of natural products; much excellent work was reported between 2011 and 2015. Since 2016, a number of more efficient and impressive total syntheses of natural products featuring photoredox catalysis have been reported. In this review, we summarize the recent synthetic applications of photoredox catalysis in the total synthesis of natural products between 2016 and 2020.

1 Introduction

2 Intermolecular Additions from Functionalized Substrates

2.1 Intermolecular Additions from Alkyl Halides

2.2 Intermolecular Additions from Alcohols and Carboxylic Acids

3 Cyclizations from Functionalized Substrates

3.1 Cyclizations of Carbon-Centered Radicals

3.2 Cyclizations of Nitrogen-Centered Radicals

4 Intramolecular Cyclization from Non-functionalized N–H Bonds

4.1 Type I Radical Cascade

4.2 Type II Radical Cascade

4.3 Type III Radical Cascade

5 Functionalization of Imines and Enamines

6 Cycloadditions

7 Miscellaneous

7.1 Dehalogenation and Reductive Decarboxylation

7.2 Thiyl Radical Promoted Cascade

8 Conclusions and Perspectives