An effective and selective conjugate propargylation reaction of stannylallenes to .alpha.,.beta.-unsaturated carbonyl compounds and .alpha.-nitro olefins
A silver-promoted auto-tandem catalysis for the synthesis of multiply substituted tetrahydrocarbazoles
作者:Ming-Zhong Wang、Cong-Ying Zhou、Chi-Ming Che
DOI:10.1039/c0cc04383d
日期:——
Silver(I) triflate efficiently catalyzes the tandem reaction of acetylenic aldehydes with indoles to give highly substituted tetrahydrocarbazoles in high yields.
dyotropic rearrangement of α‐methylene‐β‐lactones has been realized, which enables the efficient access of a wide range of α‐methylene‐γ‐butyrolactones displaying remarkable structural diversity. Several appealing features of the reaction, including excellent efficiency, high stereospecificity, predictable chemoselectivity and broad substrate scope, render it a powerful tool for the synthesis of MBL‐containing
Diametric Stereocontrol in Dynamic Catalytic Reduction of Racemic Acyl Phosphonates: Divergence from α-Keto Ester Congeners
作者:Michael T. Corbett、Jeffrey S. Johnson
DOI:10.1021/ja310980q
日期:2013.1.16
Ru-catalyzed asymmetric transfer hydrogenation of acyl phosphonates: reduction proceeded from the opposite face relative to that observed in the analogous reduction of α-keto esters. The first highly selective catalytic hydrogenation of acyl phosphonates was utilized in the dynamic kinetic resolution of α-aryl acyl phosphonates, providing β-stereogenic α-hydroxy phosphonic acidderivatives.