Stefan Koep

Asymmetric Synthesis of Unsaturated, Fused Bicyclic Proline Analogues through Amino Alkylation of Cyclic Bis(allylsulfoximine)titanium Complexes and Migratory Cyclization of δ-Amino Alkenyl Aminosulfoxonium Salts

Stefan Koep, Hans‐Joachim Gais, Gerhard Raabe · Journal of the American Chemical Society · 2003 · 84 citations

Natural Sciences, Chemistry, Medicinal Chemistry +12

Functionalized Chiral Vinyl Aminosulfoxonium Salts:  Asymmetric Synthesis and Application to the Synthesis of Enantiopure Unsaturated Prolines, β,γ-Dehydro Amino Acids, and Cyclopentanoid Keto Aminosulfoxonium Ylides

Shashi Kant Tiwari, Hans‐Joachim Gais, Andreas Lindenmaier et al. · Journal of the American Chemical Society · 2006 · 48 citations

Natural Sciences, Chemistry, Medicinal Chemistry +13

Highly Selective Addition of Chiral, Sulfonimidoyl Substituted Bis(allyl)titanium Complexes to <i>N</i>-Sulfonyl α-Imino Esters:  Asymmetric Synthesis of γ,δ-Unsaturated α-Amino Acids Bearing a Chiral, Electron-Withdrawing Nucleofuge at the δ-Position

M. Schleusner, Hans‐Joachim Gais, Stefan Koep et al. · Journal of the American Chemical Society · 2002 · 39 citations

Natural Sciences, Chemistry, Medicinal Chemistry +13

Asymmetric synthesis of 3-substituted unsaturated prolines from chiral sulfoximine substituted allyl titanium(IV) complexes

Shashi Kant Tiwari, Andreas Schneider, Stefan Koep et al. · Tetrahedron Letters · 2004 · 16 citations

Natural Sciences, Chemistry, Medicinal Chemistry +6