Optically Active Helical Lanthanide Complexes: Storable Chiral Lewis Acidic Catalysts for Enantioselective Diels–Alder Reaction of Siloxydienes. Issue 4 (22nd January 2020)

• Record Type: Journal Article
• Authors: Harada, Shinji; Nakashima, Saki; Sekino, Shihori; Oishi, Wakana; Nishida, Atsushi
• Is Part Of: Chemistry, an Asian journal. Volume 15:Issue 4(2020)
• Page Start: 483
• Page End: 486
• Publication Date: 2020-01-22
• Subjects: asymmetric synthesis -- Diels–Alder reaction -- helical structure -- lanthanides -- Lewis acid; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/asia.201901705
• Languages: English
• ISSNs: 1861-4728

Abstract

Abstract: Lanthanide triflates and a series of hexadentate chiral ligand complexes were synthesized. X‐ray‐quality crystals were obtained from mixtures of the lanthanide complexes, which were helical in shape. The complexes showed Lewis acidity and catalyzed the enantioselective Diels–Alder reaction of electron‐rich siloxydienes. The complexes were stable enough to be stored at ambient temperature on a laboratory bench and retained their Lewis acidity even after a month. Abstract : New chiral lanthanide complexes were synthesized and applied to the enantioselective Diels–Alder reaction of siloxydienes. The complexes were stable enough to be stored at room temperature.