The Role of L‐Ligands in Silica‐Supported Ti Oxo/Imido Heterometathesis Catalysts

• DOI: 10.1002/aoc.7746
• Publication Date: 2024-09-27T06:18:28Z
• Authors: Nikolai S. Bushkov; Andrey V. Rumyantsev; Andrey V. Pichugov; Anton A. Zhizhin; Dmitry Yu. Aleshin; Evgenii I. Gutsul; Rina U. Takazova; Dinara Kh. Kitaeva; Fedor M. Dolgushin; Roman A. Novikov; Pavel A. Zhizhko; Dmitry N. Zarubin

ABSTRACT We report here the preparation and characterization of new well‐defined silica‐supported Ti imido complexes that present an L‐ligand variation in a structure currently most active oxo/imido heterometathesis catalyst (≡SiO)Ti(=N t Bu)(Me 2 Pyr)(py) ( 1s ), where py is replaced with stronger electron‐donating 4‐( N,N‐ dimethylamino)pyridine 2s ) or bidentate 2,2′‐bipyridine 3s ). The materials were characterized elemental mass balance analyses IR solid‐state NMR confirmed selective formation surface species terminal ligand. Evaluation catalytic activity obtained demonstrated L‐ligands have pronounced influence on performance. In particular, replacement pyridine donating ligands resulted significant drop activity. results are discussed view reaction mechanism implications for further development.