491840-31-4Relevant academic research and scientific papers
Preparation of a series of chalcogenolate-bridged diruthenium complexes and their catalytic activities toward propargylic substitution reactions
Nishibayashi, Yoshiaki,Imajima, Hiroaki,Onodera, Gen,Hidai, Masanobu,Uemura, Sakae
, p. 26 - 30 (2004)
A series of chalcogenolate(Se,Te)-bridged diruthenium complexes (neutral and cationic) as well as their allenylidene complexes have been newly prepared, and their catalytic activities toward the propargylic substitution reactions have been compared with those using the corresponding thiolate(S)-bridged complexes. Results of both catalytic and stoichiometric reactions using these complexes together with their redox properties show that the ease of the charge transfer from one Ru atom (working as an electron pool) to the other in the complexes (synergistic effect) may be one of the important factors in promoting a key ligand exchange step for these catalytic reactions. The finding presented here may provide a new possibility of polynuclear transition metal complexes for organic transformations.
Preparation of alkanechalcogenolate- And benzenechalcogenolate-bridged diruthenium complexes and their catalytic activity toward propargylation of acetone with propargylic alcohol
Nishibayashi, Yoshiaki,Imajima, Hiroaki,Onodera, Gen,Inada, Youichi,Hidai, Masanobu,Uemura, Sakae
, p. 5100 - 5103 (2008/10/09)
Various alkanechalcogenolate (SR, SeR, TeR)and benzenechalcogenolate (SPh, SePh, TePh)-bridged diruthenium complexes have been newly prepared, and their catalytic activity toward the propargylation of acetone with propargylic alcohol has been investigated
Propargylation of aromatic compounds with propargylic alcohols catalyzed by a cationic diruthenium complex
Nishibayashi, Yoshiaki,Inada, Youichi,Yoshikawa, Masato,Hidai, Masanobu,Uemura, Sakae
, p. 1495 - 1498 (2007/10/03)
Two metals are better than one: The cationic methanethiolate-bridged diruthenium complex 1 (Cp* = C5Me5, OTf = CF3SO3) promotes the catalytic propargylation of aromatic compounds with propargylic alcohols bearing not only terminal alkyne but also internal alkyne units, reactions that can not be carried out with some mononuclear catalysts. This reaction provides a general and environmentally friendly (atom economical, only H2O as byproduct) method for the synthesis of a variety of propargylated aromatic compounds.
