Molecular Diversity

, Volume 22, Issue 2, pp 291–303 | Cite as

One-pot synthesis of novel 1-(1H-tetrazol-5-yl)-1,2,3,4-tetrahydropyrrolo[1,2-a]pyrazine derivatives via an Ugi-azide 4CR process

  • Mehdi Ghandi
  • Saleh Salahi
  • Abuzar Taheri
  • Alireza Abbasi
Original Article


A facile one-pot method has been developed for the synthesis of novel pyrrolo[2,1-a]pyrazine scaffolds. A variety of 1-(1H-tetrazol-5-yl)-1,2,3,4-tetrahydropyrrolo[1,2-a]pyrazine derivatives were obtained in moderate to high yields in methanol using a one-pot four-component condensation of 1-(2-bromoethyl)-1H-pyrrole-2-carbaldehyde, amine, isocyanide and sodium azide at room temperature. These reactions presumably proceed via a domino imine formation, intramolecular annulation and Ugi-azide reaction. Unambiguous assignment of the molecular structures was carried out by single-crystal X-ray diffraction.

Graphical Abstract


Ugi-azide Tetrahydropyrrolo[1, 2-a]pyrazine Tetrazole MCRs 



We acknowledge the University of Tehran for financial support of this research.

Supplementary material

11030_2017_9801_MOESM1_ESM.pdf (4 mb)
Supplementary material 1 (pdf 4081 KB)


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© Springer International Publishing AG, part of Springer Nature 2017

Authors and Affiliations

  1. 1.School of Chemistry, College of ScienceUniversity of TehranTehranIran

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