Synlett 2023; 34(15): 1739-1746
DOI: 10.1055/a-2065-4110
synpacts

Development of Silicon Nanowire Array–Metal Hybrid Catalysts for Batch and Flow Organic Reactions

Heeyoel Baek
,
Yoichi M. A. Yamada
We gratefully acknowledge financial support from AMED (grant no. 19ak0101115h), Japan Society for the Promotion of Science (JSPS; Grant-in-Aid for Scientific Research (B) 21H01979; The Grant-in-Aid for Transformative Research Areas (A) JP21A204, Digitalization-driven Transformative Organic Synthesis (Digi-TOS)), JST ACT-C (#JPMJCR12ZC), Fugaku Trust for Medical Research, and RIKEN.


Abstract

The development of highly efficient and reusable supported metal catalysts is important for academic and industrial synthetic organic chemistry; however, their widespread application remains a challenge because supported Pd, Rh, and Pt catalysts are expensive. To overcome these problems, we have developed novel, highly stable, reusable, and selective heterogeneous catalysts consisting of silicon nanowire arrays (SiNAs) and metal nanoparticle composites. Metal nanoparticles on SiNA have been applied as heterogeneous catalysts in the Mizoroki–Heck reaction, C–H arylation, hydrosilylation, hydrogenation, reductive alkylation of amines, and hydrogenative decarboxylation of fatty acids. The catalysts used in this study showed high catalytic activity in batch and microflow conditions. Their structural investigation using X-ray Photoelectron Spectroscopy (XPS) suggests that strong metallic bonding (alloy/agglomeration) between the metal and silicon (metal silicide bond formation) is key to the high catalyst stability.

1 Introduction

2 Development of Silicon Nanowire Array (SiNA) Hybrid Catalysts and Silicon Nanostructure (SiNS) Hybrid Catalysts

3 Application of SiNA-Pd to Organic Synthesis

4 SINA-Supported Mono- and Bimetallic Nanoparticles for Hydrogenation Reactions

5 Application of SiNA-Pd to Microflow Reductive Alkylation Reactions

6 Application of SiNA-Rh to Hydrogenative Decarboxylation Reactions using Microwave Irradiation

7 Conclusions



Publication History

Received: 07 March 2023

Accepted after revision: 29 March 2023

Accepted Manuscript online:
29 March 2023

Article published online:
26 April 2023

© 2023. Thieme. All rights reserved

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany