Ugi amine-derived P,N- and P,P-ligands with N-alkyltriethoxysilyl tethers: synthesis and evaluation of mesoporous silica-supported Pd complexes in asymmetric allylic substitution reactions |
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Authors: | Roman G KultyshevAkira Miyazawa |
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Institution: | National Institute of Advanced Industrial Science and Technology (AIST), Central 5, Higashi, Tsukuba, Ibaraki 305-8565, Japan |
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Abstract: | A facile approach to the synthesis of several types of chiral P,N- and P,P-ligands bearing triethoxysilyl groups starting from N,N-diemthyl-1-ferrocenylethylamine (Ugi amine) has been developed. Allyl palladium complexes of these ligands have been prepared, characterized, and grafted on mesoporous silica. The resulting silica-supported complexes have been shown to catalyze asymmetric allylic alkylation and aminations reactions with moderate enantioselectivities. |
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Keywords: | Supported chiral catalyst Asymmetric allylic alkylation Allylic amination Organometallic complexes bearing alkoxysilyl group |
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