Mechanochemical Immobilisation of Metathesis Catalysts in a Metal-Organic Framework

A simple, one‐step mechanochemical procedure for immobilisation of homogeneous metathesis catalysts in metal–organic frameworks was developed. Grinding MIL‐101‐NH2(Al) with a Hoveyda–Grubbs second‐generation catalyst resulted in a heterogeneous catalyst that is active for metathesis and one of the most stable immobilised metathesis catalysts. During the mechanochemical immobilisation the MIL‐101‐NH2(Al) structure was partially converted to MIL‐53‐NH2(Al). The Hoveyda–Grubbs catalyst entrapped in MIL‐101‐NH2(Al) is responsible for the observed catalytic activity. The developed synthetic procedure was also successful for the immobilisation of a Zhan catalyst. It's a kind of MAGIC: A facile mechanochemical method to immobilise homogeneous metathesis catalysts in a metal–organic framework (MOF), for example, to give a metathesis‐active Grubbs immobilised catalyst (MAGIC), was developed. During immobilisation, MOF MIL‐101‐NH2(Al) is partially converted to MIL‐53‐NH2(Al), and catalyst entrapped in the former is responsible for the observed catalytic activity (see figure).