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Synthesis of Imidazolinium Salts by Pd/C‐Catalyzed Dehydrogenation of Imidazolidines
Author(s) -
Ando Shin,
Xiao Bowen,
Ishizuka Tadao
Publication year - 2021
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.202100914
Subject(s) - dehydrogenation , chemistry , catalysis , furan , salt (chemistry) , thiophene , organic chemistry , ammonium
Abstract A method for the synthesis of imidazolinium salts through a catalytic dehydrogenation was developed using Pd/C as a catalyst with ammonium salt as an additive. Optimization of the reaction conditions revealed the existence of a proton source that was necessary to accomplish the reaction. Under the optimal conditions, oxidation‐sensitive components, such as an allyl, a furan, and a thiophene can be introduced into the corresponding imidazolinium salts. In addition to the varied N‐substituents, the presented method can be used to synthesize a series of 2‐substituted imidazolinium salts.