Catalysis science and technology p. 1064 - 1069 (2014)
Update date:2022-08-04
Topics:
Chaudhari, Chandan
Siddiki, S. M. A. Hakim
Kon, Kenichi
Tomita, Atsuko
Tai, Yutaka
Shimizu, Ken-Ichi
In a series of transition metal-loaded CeO2 catalysts and Pt-loaded catalysts on various supports, Pt-loaded CeO2 shows the highest activity for the selective C-3 alkylation of oxindole with octanol. The catalyst is effective for alkylation of oxindole and N-substituted oxindole with a series of substituted benzyl, linear, hetero-aryl alcohols under additive-free conditions and is recyclable. Our results demonstrate the first additive-free catalytic system for this reaction. Mechanistic studies show that this system is driven by the borrowing-hydrogen pathway. Structure-activity relationship studies show that co-presence of surface Pt0 species on Pt metal clusters and basic support is indispensable for this catalytic system. This journal is the Partner Organisations 2014.
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