Iridium/Chiral Diene-Catalyzed Asymmetric 1,6-Addition of Arylboroxines to α,β,γ,δ-Unsaturated Carbonyl Compounds
摘要:
Iridium-catalyzed asymmetric 1,6-addition of arylboroxines to alpha,beta,gamma,delta-unsaturated carbonyl compounds to give delta-arylated carbonyl compounds in high yields with 90-99% enantioselectivity was realized by use of an iridium/chiral diene complex.
Regioselectivity in the cross condensation of α,β-unsaturated aldehydes and methyl ketones promoted by magnesium phenoxides
作者:Andrea Pochini、Giuseppe Puglia、Rocco Ungaro
DOI:10.1016/s0040-4039(01)95557-1
日期:1979.1
“Kinetic selectivity” in the cross condensation of α,β-unsaturated aldehydes and methyl ketones are obtained using 2,4,6-trimethylphenoxymagnesium bromide (2,4,6-TMPOMgBr) in benzene as catalyst.
Annulation of α,β-unsaturatedamides with electron-deficient 1,3-dienes gave 5,6-dihydropyridin-2(1H)-ones in the presence of a hydroxoiridium catalyst. The reaction proceeded via direct C–H alkyla...
A hydroxoiridium/cod complex efficiently catalyzed hydroarylation of conjugated dienes with arenes bearing an acidic N–H bond as a directing group, which can form an amidoiridium species as an active intermediate for C–H activation. A π-allyliridium(III) complex was isolated as a key intermediate leading to the addition product.