Enantioselective Synthesis of Quaternary Carbon Stereogenic Centers through Copper-Catalyzed Conjugate Additions of Aryl- and Alkylaluminum Reagents to Acyclic Trisubstituted Enones
作者:Jennifer A. Dabrowski、Matthew T. Villaume、Amir H. Hoveyda
DOI:10.1002/anie.201304035
日期:2013.7.29
Acyclicquaternarycarbons by conjugateaddition: The first examples of catalytic enantioselectiveconjugateadditions of aryl and alkyl units that generate acyclic all‐carbonquaternarystereogeniccenters have been developed (see scheme). The requisite organoaluminum reagents can either be prepared in situ from easily available organolithiums or purchased at low cost.
Catalytic Enantioselective Protoboration of Disubstituted Allenes. Access to Alkenylboron Compounds in High Enantiomeric Purity
作者:Hwanjong Jang、Byunghyuck Jung、Amir H. Hoveyda
DOI:10.1021/ol5022417
日期:2014.9.5
Proto-boryl additions to 1,1-disubstituted allenes in the presence of 1.0–5.0 mol % of chiral NHC–Cu complexes, B2(pin)2, and t-BuOH proceed to afford alkenyl–B(pin) products in up to 98% yield, >98:2 site selectivity, and 98:2 er. The enantiomerically enriched alkenylboron products can be converted to otherwise difficult-to-access alkenyl bromides, methylketones or carboxylic acids. What’s more,
Enantioselective Synthesis of All-Carbon Quaternary Stereogenic Centers by Catalytic Asymmetric Conjugate Additions of Alkyl and Aryl Aluminum Reagents to Five-, Six-, and Seven-Membered-Ring β-Substituted Cyclic Enones
作者:Tricia L. May、M. Kevin Brown、Amir H. Hoveyda
DOI:10.1002/anie.200802910
日期:2008.9.8
Rhodium-Catalyzed Enantioselective 1,2-Addition of Aluminum Organyl Compounds to Cyclic Enones
作者:Jürgen Siewert、René Sandmann、Paultheo von Zezschwitz
DOI:10.1002/anie.200701087
日期:2007.9.17
Westermann, Juergen; Imbery, Ute; Nguyen, Anh Thu, European Journal of Inorganic Chemistry
作者:Westermann, Juergen、Imbery, Ute、Nguyen, Anh Thu、Nickisch, Klaus