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Inhibitor-binding mode of homobelactosin C to proteasomes: new insights into class I MHC ligand generation.
TLDR
The structural data for the proteasome:homobelactosin C complex provide an explanation for involvement of immunosubunits in antigen generation and open perspectives for rational design of ligands, inhibiting exclusively constitutive proteasomes or immunoproteasomes.
A Rational Chemical Synthesis of C60
TLDR
The methods developed for the target-specific synthesis of fullerenes, applied here to a synthesis of C60, should make possible the directed laboratory preparation of other fullerene as well, including those not accessible by graphite vaporization.
Isocyanides in the synthesis of nitrogen heterocycles.
TLDR
Methods starting from isocyanides often have distinct advantages over alternative approaches to the same heterocycles because of their enhanced convergence, the great simplicity of most of the operations with them, and the great variety of isOCyanides readily available for use.
Enantioselective total syntheses of belactosin A, belactosin C, and its homoanalogue.
TLDR
This concise approach comprises a novel sequential acylation/beta-lactonization reaction and allows a facile alteration of the substituents, thus providing a flexible route to a new family of highly active belactosin-based proteasome inhibitors.
(2R,1'S,2'R)- and (2S,1'S,2'R)-3-[2-Mono(di,tri)fluoromethylcyclopropyl]alanines and their incorporation into hormaomycin analogues
TLDR
Three new fluoromethyl analogues of the naturally occurring octadepsipeptide hormaomycin with (fluoromethYLcyclopropyl)alanine moieties have been synthesized and subjected to preliminary tests of their antibiotic activity.
Crystal structure of 5-oxatricyclo[5.1.0.0(1,3)]octane-4-one: two polymorphs in one crystal.
Two subsets of data, corresponding to different crystalline modifications of the title compound, 5-oxatricyclo[5.1.0.0(1,3)]octane-4-one (C(7)H(8)O(2)), have been obtained from the same experiment.
The virtue of palladium-catalyzed domino reactions - diverse oligocyclizations of acyclic 2-bromoenynes and 2-bromoenediynes.
TLDR
The domino-type combination of consecutive palladium-catalyzed cross-coupling reactions with subsequent pericyclic transformations offers a very fast access to various oligocyclic skeletons, including 1,3,5-hexatrienes and bisannelated benzene and fulvene derivatives.
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