Synthesis
DOI: 10.1055/a-2557-7569
review

Applying the Principles of Green Chemistry to Cyclopropanation

Patrícia I. C. Godinho
a   LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
,
b   Department of Organic and Inorganic Chemistry, University of Oviedo, and Instituto Universitario de Química Organometálica Enrique Moles, C/ Julián Clavería 8, 33006, Oviedo, Spain
,
a   LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
› Author Affiliations
This work has received financial support from the University of Aveiro, Fundação para a Ciência e a Tecnologia (FCT/MEC, UIDB/50006/2020), Gobierno del Principado de Asturias (SEK-25-GRU-GIC-24-054), Ministerio de Asuntos Económicos y Transformación Digital, Gobierno de España (MINECO, PID2022-137893OB-I00) and Ministerio de Ciencia e Innovación/Agencia Estatal de Investigación/European Regional Development Fund (MCIU/AEI/FEDER, UE, RTI2018-099756-B-I00). P.I.C.G. also thanks FCT for her Ph.D. grant (2022.11294.BD).


Abstract

The cyclopropane motif is widely found in many natural products and drug candidates with relevant biological activities. Moreover, due to their strained ring, cyclopropanes possess higher reactivity compared to other alkanes, giving access to a wide range of transformations. Therefore, the preparation of cyclopropanes has attracted much attention over the past decades. However, increased awareness of the environmental impact of industry and laboratories has sparked the interest in the synthesis of cyclopropanes using the principles of green chemistry. The aim of this review is to give an overview of the cyclopropanation strategies that take into consideration the principles of green chemistry. The calculation of the E-factor of a selection of the presented examples provides further insights into the importance of evaluating a chemical process through to the isolated pure product.

1 Introduction

2 Alternative Reaction Media for Cyclopropanation Reactions

2.1 Water

2.2 Ionic Liquids

2.3 Solvent-Free Cyclopropanations

3 Alternative Energy Input Cyclopropanation Reactions

3.1 Electrochemistry

3.2 Mechanochemistry

3.3 Microwave Irradiation

3.4 Ultrasound Irradiation

4 Alternative Experimental Conditions for Cyclopropanation Reactions

4.1 Biocatalysis

4.2 Photocatalysis

5 E-Factor Calculations

6 Conclusion



Publication History

Received: 08 January 2025

Accepted after revision: 13 March 2025

Accepted Manuscript online:
13 March 2025

Article published online:
08 April 2025

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