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Amino Group Functionalized Hf‐Based Metal‐Organic Framework for Knoevenagel‐Doebner Condensation
Author(s) -
Das Aniruddha,
Anbu Nagaraj,
Gogoi Chiranjib,
Dhakshinamoorthy Amarajothi,
Biswas Shyam
Publication year - 2021
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.202100396
Subject(s) - knoevenagel condensation , chemistry , catalysis , metal organic framework , cinnamic acid , yield (engineering) , malonic acid , benzaldehyde , organic chemistry , heterogeneous catalysis , combinatorial chemistry , substrate (aquarium) , condensation reaction , adsorption , materials science , oceanography , metallurgy , geology
A Hf(IV) metal‐organic framework (MOF) with di‐amino functionalized linker was obtained as a crystalline solid with UiO‐67 topology under solvothermal reaction conditions. The guest free form of Hf(IV) MOF ( 1′ ) was efficiently employed as a heterogeneous catalyst to synthesize cinnamic acid derivatives via Knoevenagel‐Doebner reaction for the first time. The catalyst ( 1′ ) was efficiently active to directly achieve cinnamic acid from benzaldehyde and malonic acid. The solid retained its activity up to 6 th cycle with no decay in its activity. The noticeable advantages of the catalyst are its milder reaction conditions, high yield, high stability, recyclable nature towards catalysis and wide substrate scope as well as shape‐selective behaviour. The possible mechanism of the reaction was also studied thoroughly with suitable control experiments.