A Cu-mediated one-pot Michael addition/α-arylation strategy using a diaryliodonium salt: a direct and efficient approach to α-aryl-β-substituted cyclic ketone scaffolds
A direct and efficient construction of [small alpha]-aryl-[small beta]-substituted cyclicketone scaffolds has been achieved using Cu-mediated one-pot Michael addition/[small alpha]-arylation strategy. The reaction features easily available materials, broad substrate scope, moderate to...
Fully Stereocontrolled Total Syntheses of the Prostacyclin Analogues 16<i>S</i>-Iloprost and 16<i>S</i>-3-Oxa-Iloprost by a Common Route, Using Alkenylcopper-Azoalkene Conjugate Addition, Asymmetric Olefination, and Allylic Alkylation
作者:Guido J. Kramp、Mikhail Kim、Hans-Joachim Gais、Cornelia Vermeeren
DOI:10.1021/ja0558037
日期:2005.12.1
stereocontrolled total syntheses of 16S-iloprost (16S-2), the most active component of the drugs Ilomedin and Ventavis, and of 16S-3-oxa-iloprost (16S-3), a close analogue of 16S-2 having the potential for a high oral activity, by a new and common route. The key steps of this route are (1) the establishment of the complete C13-C20 omega side chain of the target molecules through a stereoselective conjugate addition
2‐endo‐substituted and 2‐endo,N‐fused bi‐ and tricyclic bispidines. The new diamines were evaluated as the chiral ligands in asymmetricHenryreactions. Excellent enantioselectivities of up to 99 % ee and good diastereomeric ratios of up to 86:14 were reached with a copper(II) complex modified by a 2‐endo,N‐(3,3‐dimethylpyrrolidine)‐annelated bispidine. Its performance is superior to that of the well‐known bispidines
A cationiciron carbene complex has been found to undergo intramolecular cationic olefinic cyclization, resulting in formation of a six-membered carbocyclic ring.
发现阳离子铁卡宾配合物经历分子内阳离子烯烃环化,导致形成六元碳环。
Enantioselektive Synthese von Allyl-, Propargyl- und 4-En-2-inyl-aminen durch 1,2-Addition von Organocer-Reagenzien an chirale Aldimine
作者:Dieter Enders、J�rgen Schankat
DOI:10.1002/hlca.19950780419
日期:1995.6.28
Enantioselective Synthesis of Allyl-, Propargyl-, and 4-En-2-ynyl-amines via 1,2-Addition of Organocerium Reagents to Chiral Aldehyde Imines