Catalytic enantioselective protoboration of disubstituted allenes. Access to alkenylboron compounds in high enantiomeric purity
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. T
Jang, Hwanjong,Jung, Byunghyuck,Hoveyda, Amir H.
supporting information
p. 4658 - 4661
(2015/02/19)
Enantioselective synthesis of quaternary carbon stereogenic centers through copper-catalyzed conjugate additions of aryl- and alkylaluminum reagents to acyclic trisubstituted enones
Acyclic quaternary carbons by conjugate addition: The first examples of catalytic enantioselective conjugate additions of aryl and alkyl units that generate acyclic all-carbon quaternary stereogenic centers have been developed (see scheme). The requisite
Dabrowski, Jennifer A.,Villaume, Matthew T.,Hoveyda, Amir H.
supporting information
p. 8156 - 8159
(2013/08/23)
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