Chiral vanadium complex-catalyzed oxidative coupling of arenols
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DOI: 10.1016/j.tet.2020.131645
Abstract: Abstract This report describes the recent advances in the development of chiral vanadium complex-catalyzed oxidative couplings of phenols such as polycyclic phenols, hydroxycarbazoles, resorcinol, and sesamol derivatives. Catalysts containing a vanadium metal and multidentate ligand… read more here.
Keywords: vanadium; chiral vanadium; oxidative coupling; complex catalyzed ... See more keywords
Chiral-Boron-Complex-Catalyzed Asymmetric [3 + 2] Cycloaddition of 2'-Hydroxychalcones with N,N'-Cyclic Azomethine Imines.
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DOI: 10.1021/acs.orglett.2c02597
Abstract: We report the (R)-3,3'-I2-BINOL-boron-complex-catalyzed asymmetric 1,3-dipolar cycloaddition of 2'-hydroxychalcones with N,N'-cyclic azomethine imines, providing the corresponding N,N'-bicyclic pyrazolidine derivatives with three contiguous tertiary stereocenters in high yields with excellent diastereo- and enantioselectivities (up to >99:1… read more here.
Keywords: catalyzed asymmetric; cycloaddition hydroxychalcones; complex catalyzed; boron complex ... See more keywords
A chiral cobalt(ii) complex catalyzed enantioselective aza-Piancatelli rearrangement/Diels–Alder cascade reaction†
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DOI: 10.1039/d0sc00542h
Abstract: A chiral N,N′-dioxide/cobalt(ii) complex catalyzed highly diastereoselective and enantioselective tandem aza-Piancatelli rearrangement/intramolecular Diels–Alder reaction has been disclosed. Various valuable hexahydro-2a,5-epoxycyclopenta[cd]isoindoles bearing six contiguous stereocenters have been obtained in good yields with excellent diastereo- and enantio-selectivities… read more here.
Keywords: diels alder; cobalt complex; piancatelli rearrangement; complex catalyzed ... See more keywords
Cu(ii)/SPDO complex catalyzed asymmetric Baeyer–Villiger oxidation of 2-arylcyclobutanones and its application for the total synthesis of eupomatilones 5 and 6
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DOI: 10.1039/d2sc02079c
Abstract: A novel classical kinetic resolution of 2-aryl-substituted or 2,3-disubstituted cyclobutanones of Baeyer–Villiger oxidation catalyzed by a Cu(ii)/SPDO complex is reported for the first time, producing normal lactones in excellent enantioselectivities (up to 96% ee) and… read more here.
Keywords: baeyer villiger; spdo complex; villiger oxidation; catalyzed asymmetric ... See more keywords