Synthesis and structural analysis of angular monoprotected diamines based on spiro[3.3]heptane scaffold

The Journal of Organic Chemistry
Anton V ChernykhIgor V Komarov

Abstract

The synthesis of all stereoisomers of spiro[3.3]heptane-1,6-diamines suitably protected for use as building blocks in drug discovery is reported. Structural analysis revealed the similarity between the spiro[3.3]heptane and cyclohexane scaffolds. Comparison of the distance between functional groups and their spatial orientation proved that (1S,4r,6R)- and (1R,4r,6S)-1,6-disubstituted spiro[3.3]heptanes can be considered as restricted surrogates of cis-1,4-disubstituted cyclohexane derivatives. Similarly, (1S,4s,6R)- and (1R,4s,6S)-1,6-disubstituted spiro[3.3]heptanes are the restricted surrogates of trans-1,3-disubstituted cyclohexanes. Such replacement can be recommended for use in optimization of ADME parameters of lead compounds in drug discovery.

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