Synthesis 2015; 47(08): 1123-1130
DOI: 10.1055/s-0034-1380116
paper
© Georg Thieme Verlag Stuttgart · New York

Synthesis of a 2,5-Diazabicyclo[2.2.1]heptane-Derived α,β-Diamino Acid

Yevhen M. Ivon
a   Taras Shevchenko National University of Kyiv, Volodymyrska Street 64, Kyiv 01601, Ukraine   eMail: gregor@univ.kiev.ua
b   Enamine Ltd., Alexandra Matrosova Street 23, Kyiv 01103, Ukraine
,
Andriy V. Tymtsunik
a   Taras Shevchenko National University of Kyiv, Volodymyrska Street 64, Kyiv 01601, Ukraine   eMail: gregor@univ.kiev.ua
,
Igor V. Komarov
a   Taras Shevchenko National University of Kyiv, Volodymyrska Street 64, Kyiv 01601, Ukraine   eMail: gregor@univ.kiev.ua
b   Enamine Ltd., Alexandra Matrosova Street 23, Kyiv 01103, Ukraine
,
Oleg V. Shishkin
c   STC ‘Institute for Single Crystals’, National Academy of Sciences of Ukraine, 60 Lenina Ave., 61001 Kharkiv, Ukraine
,
Oleksandr O. Grygorenko*
a   Taras Shevchenko National University of Kyiv, Volodymyrska Street 64, Kyiv 01601, Ukraine   eMail: gregor@univ.kiev.ua
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Publikationsverlauf

Received: 08. November 2014

Accepted after revision: 23. Dezember 2014

Publikationsdatum:
03. Februar 2015 (online)


Abstract

The synthesis of optically pure (1S,4S)-2,5-diazabicyclo[2.2.1]heptane-1-carboxylic acid starting from easily available ‘chiral pool’ l-4-hydroxyproline is reported. A tandem Strecker reaction–intramolecular nucleophilic cyclization (STRINC) sequence was used as the key synthetic step for the first time to prepare a diamino acid. Careful examination of the side products obtained in the STRINC step allowed the suggestion of a mechanistic explanation for the observed facts and optimization the yield of the aminonitrile precursor. The reported scalable synthesis opens the way to use the diamino acid as a branch point in peptides and as a building block in drug discovery.

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