Search Results - "Greb, Marco"

Controlling 6-endo-selectivity in oxidation/bromocyclization cascades for synthesis of aplysiapyranoids and other 2,2,6,6-substituted tetrahydropyrans by Brücher, Oliver, Bergsträßer, Uwe, Kelm, Harald, Hartung, Jens, Greb, Marco, Svoboda, Ingrid, Fuess, Hartmut

“…A cascade, composed of (i) oxovanadium(V)-catalyzed oxidation of bromide by tert-butyl hydroperoxide and (ii) stereoselective 6-endo-bromocyclization, affords…”
Get full text

Transition metal-catalyzed oxidations of bishomoallylic alcohols by Hartung, Jens, Greb, Marco

“…In recent years, new transition metal-catalyzed reactions for chemo- and stereoselective oxidations of bishomoallylic alcohols have been developed. The role of…”
Get full text

(Schiff-base)vanadium(V) Complex-Catalyzed Oxidations of Substituted Bis(homoallylic) Alcohols − Stereoselective Synthesis of Functionalized Tetrahydrofurans by Hartung, Jens, Drees, Simone, Greb, Marco, Schmidt, Philipp, Svoboda, Ingrid, Fuess, Hartmut, Murso, Alexander, Stalke, Dietmar

“…Vanadium(V) complexes 4 have been prepared from tridentate Schiff‐base ligands 3 and VO(OEt)3. All vanadium(V) compounds were characterized (IR, UV/Vis, and…”
Get full text

The (Schiff base)vanadium(V) Complex Catalyzed Oxidation of Bromide − A New Method for the in situ Generation of Bromine and Its Application in the Synthesis of Functionalized Cyclic Ethers by Greb, Marco, Hartung, Jens, Köhler, Franz, Špehar, Kristina, Kluge, Ralph, Csuk, René

“…(Schiff base)vanadium(V) complexes 5 with tridentate imine auxiliaries served as catalysts for the oxidation of Br− with tert‐butyl hydroperoxide (TBHP) in…”
Get full text

On the reactivity of bromoperoxidase I (Ascophyllum nodosum) in buffered organic media: Formation of carbon bromine bonds by Hartung, Jens, Dumont, Yvonne, Greb, Marco, Hach, Diana, Köhler, Franz, Schulz, Heiko, Časný, Marian, Rehder, Dieter, Vilter, Hans

“…Peroxidase (PO) activity of vanadate(V)-dependent bromoperoxidase (BPO) I ( ) [V PO( I)] was retained with a half-life time of ~60 days, if stored in H…”
Get full text

Biosynthesis of naphthylisoquinoline alkaloids: synthesis and incorporation of an advanced 13C2-labeled isoquinoline precursor by Bringmann, Gerhard, Mutanyatta-Comar, Joan, Greb, Marco, Rüdenauer, Stefan, Noll, Torsten F., Irmer, Andreas

Get full text

A new synthesis of the 2,2,3,5,6,6-substituted tetrahydropyran aplysiapyranoid A and its 5-epimer by Hartung, Jens, Greb, Marco

“…The vanadium(V)-catalyzed oxidation of bromide in the presence of methyl ( E)-2-(1-hydroxy-1-methylethyl)-5-phenyl-4-hexenoate furnished 5,6-…”
Get full text

Biosynthesis of naphthylisoquinoline alkaloids: synthesis and incorporation of an advanced 13C 2-labeled isoquinoline precursor by Bringmann, Gerhard, Mutanyatta-Comar, Joan, Greb, Marco, Rüdenauer, Stefan, Noll, Torsten F., Irmer, Andreas

“…Biosynthetic studies on naphthylisoquinoline alkaloids involving a specifically [1,1′- 13C 2]-labeled dihydroisoquinoline 7 are described. The synthesized…”
Get full text