論文

査読有り
2020年5月

Accumulation of Active Species in Silica Mesopore: Effect of the Pore Size and Free Base Additives on Pd-catalyzed Allylation using Allylic Alcohol

CHEMCATCHEM
  • Ken Motokura
  • ,
  • Sae Kawashima
  • ,
  • Masayuki Nambo
  • ,
  • Yuichi Manaka
  • ,
  • Wang-Jae Chun

12
10
開始ページ
2783
終了ページ
2791
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1002/cctc.202000266
出版者・発行元
WILEY-V C H VERLAG GMBH

A mesoporous silica-supported Pd complex was prepared using various types of porous silica supports (pore size: 16-31 angstrom). The effects of the pore size and base additive properties on the catalytic allylation were investigated. The activity of the Pd-catalyzed allylation of nucleophiles with specific base additives, such as 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), is strongly affected by the mesopore size. The best allylation performance is obtained with a pore size of 23 angstrom. On the other hand, bases with smaller/larger molecular size and/or high nucleophilicity, such as K2CO3 and 1,4-diazabicyclo[2.2.2]octane (DABCO), do not seem to show clear pore effect on the catalysis. The performance of the catalytic allylation significantly decreases by using such bases. Kinetic, spectroscopic, and control experiments reveal that the effective accumulation of Pd species and DBU in mesopores with appropriate pore sizes enhances their frequency factors.


リンク情報
DOI
https://doi.org/10.1002/cctc.202000266
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000522777700001&DestApp=WOS_CPL
ID情報
  • DOI : 10.1002/cctc.202000266
  • ISSN : 1867-3880
  • eISSN : 1867-3899
  • Web of Science ID : WOS:000522777700001

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