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Mar 2013

Fulicinerosid

A total synthesis of the proposed structures of fulicineroside and its aglycone fulicinerine is reported. Comparison with the reported data for the natural product and the aglycone suggests a misassignment of the natural product's structure.

 

 


Jan 2013

cyclooctyne

Adsorption of cyclooctyne on Si(001) was investigated by means of scanning tunneling microscopy. Two different adsorption configurations were identified for the chemisorbed molecules which exhibit a tendency for clustering along the dimer rows. Our results suggest a direct adsorption pathway for cyclooctyne on Si(001) most likely governed by the molecule’s triple bond in combination with its high ringstrain.

 

 


pen

6,13‑Disubstituted pentacenes were synthesized. Their electrochemical and optical properties and their solid-state packing motif were determined. 6,13‑Bis(trifluoromethyl)pentacene and 6,13‑dimethoxypentacene exhibit slipped face to face pi-stacking in the solid state while 6,13‑diethoxypentacene forms pairs of pi-stacking molecules in the solid state.

 

 


Crotylboration

Crotylboration of vic-diketoamides and vic-diketo esters was achieved with high diastereoselectivity and complementary regioselectivity. Whereas (E)-crotylboration of α,β-diketoamides resulted in high yields (91–99%) of β-crotylated products obtained as a single diastereomer (anti), Lewis acid promoted crotylboration of α,β-diketo esters yielded the α-crotylated species with the anti product as main diastereomer.

 

Oct 2012

Granaticin5

Efficient, stereoselective routes to BCD-ring and AB-ring substructures of the natural product granaticin A have been developed.

Aug 2012

lodopyridone
A convergent total synthesis of the structurally unprecedented alkaloid lodopyridone was achieved using a cross coupling of an iodopyridone fragment with a quinolinethiazolyl stannane.


May 2012

awajanots2

vic-tricarbonyl compounds:

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

Zuletzt aktualisiert: 22.05.2013 · Jan Roßbach

 
 
Fb. 15 - Chemie

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