Advanced sol–gel process for efficient heterogeneous ring-closing metathesis

The results indicate that the nature of the precursor affects pore size and catalyst activity

Shiran Aharon; Dan Meyerstein; Eyal Tzur; Dror Shamir; Yael Albo; Ariela Burg

2021

Scholarcy highlights

  • Olefin metathesis, a powerful synthetic method with numerous practical applications, can be improved by developing heterogeneous catalysts that can be recycled
  • Sol–gel matrices containing types 1 and 2 ruthenium-based catalysts were made according to the procedure described in our recent ­studies and in the Supporting Information Sect. 1.1
  • The catalyst may be smaller than the pore radii of the sol–gel matrix, which would cause them to leak from the matrix during the washing of the latter before the activity test, thereby resulting in low conversion rates
  • Far fewer studies have been done in heterogeneous systems, especially in the simple ones that enable easy separation of the catalyst and the by-products of ruthenium from the reaction products
  • The goal of this study was to develop a simple heterogeneous catalytic process for the entrapment of ruthenium-based catalysts that would be characterized by high efficiency and low catalyst leakage from the matrix
  • This study focused on finding the optimal conditions in a standard laboratory setting for the entrapment of catalysts in sol–gel matrices without covalent binding, thereby relying only on the physical properties of the catalyst and the matrix
  • The results we obtained in this study led to the following conclusions:

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