<i>C</i><sub>2</sub>-Symmetric 2,2′-Bipyridine-α,α′-1-adamantyl-diol Ligand: Bulky Iron Complexes in Asymmetric Catalysis
作者:Samuel Lauzon、Lionel Schouwey、Thierry Ollevier
DOI:10.1021/acs.orglett.2c00141
日期:2022.2.4
synthesis of a chiral 2,2′-bipyridine-α,α′-1-adamantyl-diol ligand was achieved starting from commercially available materials. The bulky ligand was synthesized in three steps in 40% overall yield with stereoselectivities of 98% de and >99.5% ee for the S,S enantiomer. The absolute configuration of and structural insights into a heptacoordinated 2,2′-bipyridine-α,α′-1-Ad-diol/FeII chiral complex were
Evidence for the importance of π-π-attractive interactions in Enantioselective Diels-Alder reactions chiral catalysts of type (RO)2TiCl2
作者:E.J. Corey、Yasushi Matsumura
DOI:10.1016/0040-4039(91)80149-z
日期:1991.10
with Ti(Oi-Pr)4 followed by SiCl4 results in formation of the Ti (IV) complex 5 which is an exceptionally effective catalyst for enantioselective Diels-Alder reactions. The origin of the high enantioselectivities which have been observed (>95 : 5) probably lies in attractive π-π interaction between an aromatic group and the dienophile as indicated in formula 7.
First Example of a Highly Enantioselective Catalytic Diels-Alder Reaction of an Achiral C2v-Symmetric Dienophile and an Achiral Diene
作者:E. J. Corey、Sepehr Sarshar、Duck-Hyung Lee
DOI:10.1021/ja00105a074
日期:1994.12
Catalytic enantioselective synthesis of a key intermediate for the synthesis of prostanoids
作者:E.J. Corey、Nobuyuki Imai、Stanislaw Pikul
DOI:10.1016/0040-4039(91)80522-8
日期:1991.12
A route has been demonstrated for the enantioselectivesynthesis of prostanoids from achiral starting materials by the use of chiral catalysts of the molecular robot class.