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Latest NEWS:

 

Mai 2012

awajanots2

vic-tricarbonyl compounds:

an asymmetric allylboration was used as a key step in the total synthesis of the natural product (+)-awajanomycin.


Dec 2011

A novel directed SN2 reaction of conformational biased gem-dibromides and an arenesulfinate anion is described. The reaction results in the diastereoselective formation of α-bromosulfones. The selectivity originates from pre-coordination of the nucleophile to a free hydroxyl group in γ-position.

 

Okt 2011

Highlight:

awajano

An efficient total synthesis of (+)-awajanomycin was achieved starting with an asymmetric allylboration of a vic-tricarbonyl compound. A stereoselective alkene dihydroxylation followed by a differentiation of diastereotopic ester groups and a subsequent lactamization gave the bicyclic core structure.

Sep 2011 

pestaphthalide 

Total syntheses of (+)-pestaphthalide A and (-)-pestaphthalide B were achieved. Key steps are an iridium-mediated meta-selective arylborylation,  a stereodivergent epoxide opening and an anionic cyclic carbonate/γ-lactone rearrangement.

 

May 2011

OmpF Kronenether
Ion-channel engineering (ICE) modifies biological ion channels by chemical/biological synthesis means. The goal is to obtain ion channels with modified or novel functionality. Applied functional strategies are the manipulation of the wider pores with robust β-barrel structures, the modification of narrow pores and channel gating by (photo)triggering the biological receptor that controls the channel. Synthetic strategies are the S-alkylation of specifically introduced Cys, protein semisynthesis by native chemical ligation, protein semisynthesis by protein trans-splicing, as well as nonsense-suppression methods.

Last modified: 24.05.2012 · Jan Roßbach

 
 
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