Enzymatic desymmetrization of 2,5-dideoxystreptamine precursors

Cyclic cis-1,3-Diamines Derived from Bicyclic Hydrazines: Synthesis and Applications

Cyclic cis-1,3-diamines are versatile building blocks frequently found in natural molecules or biologically active compounds. In comparison with widely studied 1,2-diamines, and despite their chemical similarity, 1,3-diamines have been investigated less intensively probably because of a lack of general synthetic procedures giving access to these compounds with good levels of chemo-, regio-, and stereocontrol. In this Account we will give a general overview of the biological interest of cyclic cis-1,3-diamines. We will then describe the synthesis and potential applications of these compounds with a particular focus on the work realized in our laboratory.

1 Introduction

2 Biological Relevance of the cis-1,3-Diamine Motif

3 Classical Synthetic Strategies towards cis-1,3-Diamines

4 N–N Bond Cleavage of Bicyclic Hydrazines: A Versatile Method to Access cis-1,3-Diamines

4.1 Preparation of Five-Membered Cyclic cis-1,3-Diamino Alcohols

4.2 Access to Fluorinated 1,3-cis-Diaminocyclopentanes

4.3 Synthesis of cis-1,3-Diaminocyclohexitols

4.4 Formation of Cyclic cis-3,5-Diaminopiperidines

5 Applications of Cyclic cis-1,3-Diamines

5.1 Small-Molecular RNA Binders

5.2 Fluorinated 1,3-Diamino Cyclopentanes as NMR Probes

6 Concluding Remarks

Fluorescent probe for detection of bacteria: conformational trigger upon bacterial reduction of an azo bridge

Using biomimetic chemical reduction or Clostridium perfringens cell extract containing azoreductase, the dimer-fluorescent probe 2,4-O-bisdansyl-6,7-diazabicyclooct-6-ene, which possesses a conformationally constrained cis-azo bridge, is reduced to the tetra-equatorial 2,4-O-bisdansyl-cyclohexyl-3,5-bisammonium salt which exhibits fluorescence indicative of a dansyl monomer.

Synthesis of (-)-lobeline via enzymatic desymmetrization of lobelanidine

The bioactive alkaloid (-)-lobeline was synthesized via the stereoselective acylation (desymmetrization) of meso-lobelanidine by vinyl acetate in the presence of Candida antarctica lipase B.