Synthesis 2016; 48(03): 329-339
DOI: 10.1055/s-0035-1560536
short review
© Georg Thieme Verlag Stuttgart · New York

Peroxide: A Novel Methylating Reagent

Qiang Dai
School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. of China
,
Yan Jiang
School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. of China
,
Jin-Tao Yu
School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. of China
,
Jiang Cheng*
School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. of China
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Publikationsverlauf

Received: 13. August 2015

Accepted after revision: 13. Oktober 2015

Publikationsdatum:
13. November 2015 (online)


Abstract

Methylation is an important transformation in organic chemistry. Methods for methylation in industry and academia still frequently employ hazardous and toxic reagents, such as diazomethane, dimethyl carbonate, methyl iodide, and dimethyl sulfate. From the point of view of sustainable and environmentally friendly chemistry, much effort has been devoted to the discovery and development of alternative methylating reagents. A particularly attractive new methyl source that is attracting attention is derived from the cleavage of peroxides. This short review summarizes recent important developments using peroxides as versatile methylating reagents, including direct methylation and sequential methylation together with other functionalization processes. The corresponding reaction mechanisms are also discussed.

1 Introduction

2 Direct Methylation

2.1 Methylation of C–H Bonds

2.2 Methylation of N–H Bonds

2.3 Methylation of O–H Bonds

3 Methylation together with Other Functionalizations

3.1 Oxidation and Methylation

3.2 Decarboxylative Methylation

3.3 Methylation and Cyclization

4 Conclusions and Perspectives