Copper-Catalyzed Asymmetric Conjugate Addition of Trialkylaluminium Reagents to Trisubstituted Enones: Construction of Chiral Quaternary Centers
作者:Magali Vuagnoux-d'Augustin、Alexandre Alexakis
DOI:10.1002/chem.200701001
日期:2007.11.26
vinylalane species undergo enantioselective conjugateaddition to a wide range of 2- or 3-substituted enones (cyclopent-2-enones, cyclohex-2-enones, 3-methyl cyclohept-2-enone) in the presence of catalytic amount of copper salt (copper thiophene carboxylate, [Cu(CH3CN)4]BF4 or [CuOTf]2C6H6) and tropos-phosphoramidite-based ligand. Thus, chiral quaternarycenters can be built, with up to 98% ee after rigorous
Palladium-Catalyzed Conjugate Addition of Arylboronic Acids to β,β-Disubstituted Enones in Aqueous Media: Formation of Bis-benzylic and <i>ortho</i>-Substituted Benzylic Quaternary Centers
作者:Ryan Van Zeeland、Levi M. Stanley
DOI:10.1021/acscatal.5b01272
日期:2015.9.4
Palladium-catalyzed conjugate addition of arylboronic acids to β,β-disubstituted enones in aqueousmedia is reported. Additions of a wide range of arylboronic acids to β,β-disubstituted enones occur to form ketone products bearing benzylic all-carbon quaternary centers. These reactions are promoted by a simple catalyst prepared from palladium trifluoracetate and 2,2′-bipyridine. The use of aqueous sodium trifluoracetate
Enantioselective palladium catalyzed conjugate additions of ortho-substituted arylboronic acids to β,β-disubstituted cyclic enones: total synthesis of herbertenediol, enokipodin A and enokipodin B
作者:Jeffrey Buter、Renée Moezelaar、Adriaan J. Minnaard
DOI:10.1039/c4ob01085j
日期:——
Palladium catalyzed asymmetric conjugate addition of ortho-substituted arylboronic acids to cyclic enones and its application in natural product synthesis.
Enantioselective construction of <i>ortho</i>-substituted benzylic quaternary centers using a phenanthroline-Pd catalyst
作者:Masafumi Tamura
DOI:10.1039/d2ob01743a
日期:——
addition of ortho-substituted arylboronic acids to cyclic enones was developed. The addition of various ortho-substituted arylboronic acid to β-substituted cyclic enones, via catalysis with a chiral phenanthroline-Pd complex, formed cyclic ketone products bearing ortho-substituted benzylic all-carbon quaternarycenters with good yields and high enantioselectivity.