The ruthenium-catalyzed stereospecific decarboxylative allylation of ketone enolates provides access to gamma,delta-unsaturated ketones with good yields and enantio-enrichments.

Highly concise and stereospecific routes to cis and trans fusion, carrying various functionality at one of the bridgehead carbons, have been accomplished.

The aim of this review is to cover the contribution of high resolution NMR spectroscopy to the study of polymer microstructure, particularly after the years 1974-5, thus continuing the series of previous reviews (1-6). The impact of stereospecific catalysts on the polymer world has created new demands for methods of studying the stereochemical configuration of polymer chains. NMR spectroscopy h...

The stereospecific and regioselective C(3) alkynylation of trisubstituted epoxides has been achieved with lithium alkynyl trimethylaluminium ate complexes in the presence of BF3 x OEt2.

Protein-protein association can be viewed as a two-step process comprising the initial formation of an encounter complex ensemble followed by rearrangement, along a two-dimensional energy landscape, to form the final well-defined stereospecific complex (Figure 1).1-5 Theoretical work suggests that electrostatic interactions play an important role in encounter complex formation, thereby enhancin...

I. Amino Acids A. Alkylamino Acids: :-Alkylamino acids, L-proline, L-valine. B. Hydroxyamino Acids: L-Serine, L-threonine, D-allothreonine, L-isoserine. C. Amino-amino Acids: L-2,3-Diaminopropionic acid, L-2,4-diaminobutyric acid. D. Carboxyamino Acids: L-Aspartic acid, 3-amino-pentanedioic acids. E. Thioamino Acids: D-Penicillamine, DOr L-methylcysteine, L-cysteine, L-methionine. F. Amido-amin...