Synthesis 2017; 49(15): 3377-3393
DOI: 10.1055/s-0036-1590818
short review
© Georg Thieme Verlag Stuttgart · New York

Recent Developments of Manganese Complexes for Catalytic Hydrogenation and Dehydrogenation Reactions

Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia-741246, West Bengal, India   eMail: bm@iiserkol.ac.in
,
Milan K. Barman
Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia-741246, West Bengal, India   eMail: bm@iiserkol.ac.in
› Institutsangaben
The author thanks IISER Kolkata (Start-up grant) and DST SERB (ECR/2016/001654) for financial support. M.K.B. thanks SERB for an NPDF fellowship.
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Publikationsverlauf

Received: 30. April 2017

Accepted after revision: 06. Juni 2017

Publikationsdatum:
13. Juli 2017 (online)


Dedicated to Professor Dr. Herbert Mayr on the occasion­ of his 70th birthday

Abstract

Being the third most abundant transition metal in the Earth’s crust (after iron and titanium) and less toxic, reactions catalyzed by manganese are becoming very important. A large number of manganese complexes have been synthesized using bidentate and tridentate ligands. Such manganese complexes display excellent catalytic activities for various important organic transformations, such as hydrogenation, dehydrogenation, dehydrogenative coupling, transfer hydrogenation reactions, etc. In this short review, recent developments of such manganese-catalyzed reactions are presented.

1 Introduction

2 Well-Defined Manganese-Complex-Catalyzed Hydrogenation Reactions

2.1 Hydrogenation of Nitriles

2.2 Hydrogenation of Aldehydes and Ketones

2.3 Hydrogenation of Esters

2.4 Hydrogenation of Amides

2.5 Hydrogenation of Carbon Dioxide

3 Manganese-Catalyzed Dehydrogenation Reactions

3.1 Selective Dehydrogenation of Methanol

3.2 Dehydrogenative N-Formylation of Amines by Methanol

3.3 Dehydrogenative Coupling Reactions of Alcohols

3.4 Imine Synthesis via Dehydrogenative Coupling of Alcohols and Amines

3.5 Synthesis of N-Heterocycles via Dehydrogenative Coupling

4 Manganese-Catalyzed Dehydrogenation–Hydrogenation Cascades

4.1 N-Alkylation of Amines with Primary Alcohols

4.2 α-Alkylation of Ketones with Primary Alcohols

4.3 Transfer Hydrogenation of Ketones

5 Conclusion