The field of amino acids has gained enormous popularity and relevance in recent years,
particularly with the emergence of unnatural analogs as components of molecules with …

The a-amino-carboxylic-acids are one of the five major classes of natural products and they
exhibit.-important and diverse biological functions.',* Historically, the aminoacids have been …

Among the different possible cyclizations leading to nitrogen-containing heterocycles,
iminium ion cyclization is a widely used process exemplified by some very famous, and old …

1. Introduction 3517 2. Diastereoselective alkylation of α-amino acids. Self-reproduction of
chirality 3518 3. Diastereoselective alkylation of chiral amino acid enolates 3535 4. Chiral β …

The development of methods for the asymmetric synthesis of chiral compounds has been an
area of intense research over the last decade. 1 The interest in the preparation of chiral …

The inhibition of cysteine proteases is being studied as a strategy to combat parasitic
diseases such as Chagas' disease, leishmaniasis, and malaria. Cruzain is the major …

A novel ion pair catalyst containing a chiral counteranion can be readily derived by simply
mixing cinchona alkaloid-derived diamine with chiral camphorsulfonic acid (CSA). A mixture …

Naturally occurring amino acids have been extensively applied in the area of synthetic
organic chemistry. 1 They may serve as cheap, commercially available enantiomerically …

The X‐ray diffraction experiments on peptides and related molecules which have been
carried out in Western Europe, except Italy, in the last eight years are reviewed. The crystal …

A compendium of compounds designed as dipeptide mimetics was collected from the
literature. Conformational space available to these molecules was evaluated to obtain …