Synthesis 2018; 50(18): 3549-3570
DOI: 10.1055/s-0037-1610193
review
© Georg Thieme Verlag Stuttgart · New York

Interrupted Ugi and Passerini Reactions: An Underexplored Treasure Island

Mariateresa Giustiniano*
a   Dipartimento di Farmacia, Università degli Studi di Napoli ‘Federico II’, via D. Montesano 49, 80131 Napoli, Italy   Email: mariateresa.giustiniano@unina.it
,
Lisa Moni*
b   Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, via Dodecaneso 31, 16146 Genova, Italy   Email: lisa.moni@unige.it
,
Luca Sangaletti
c   Dipartimento di Scienze del Farmaco, Università degli Studi del Piemonte Orientale “A. Avogadro”, largo Donegani 2, 28100 Novara, Italy   Email: giancesare.tron@uniupo.it
,
Sveva Pelliccia
a   Dipartimento di Farmacia, Università degli Studi di Napoli ‘Federico II’, via D. Montesano 49, 80131 Napoli, Italy   Email: mariateresa.giustiniano@unina.it
,
Andrea Basso
b   Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, via Dodecaneso 31, 16146 Genova, Italy   Email: lisa.moni@unige.it
,
Ettore Novellino
a   Dipartimento di Farmacia, Università degli Studi di Napoli ‘Federico II’, via D. Montesano 49, 80131 Napoli, Italy   Email: mariateresa.giustiniano@unina.it
,
Gian Cesare Tron*
c   Dipartimento di Scienze del Farmaco, Università degli Studi del Piemonte Orientale “A. Avogadro”, largo Donegani 2, 28100 Novara, Italy   Email: giancesare.tron@uniupo.it
› Author Affiliations
Financial support from Università del Piemonte Orientale, Novara, Università di Genova and Università di Napoli is acknowledged. M.G. acknowledges the Associazione Italiana per la Ricerca sul Cancro (AIRC; grant MFAG 18793).
Further Information

Publication History

Received: 06 April 2018

Accepted after revision: 14 May 2018

Publication Date:
15 August 2018 (online)


Abstract

The formation of the key short-lived intermediate nitrilium ion in the Passerini and Ugi reactions was recognized early in the discovery of these two-multicomponent transformations. Surprisingly, the idea of intramolecularly intercepting it, eluding the attack by the carboxylate, and thus interrupting the normal course of the reaction, was missed by chemists for several decades. In this review we describe, in an exhaustive manner, the reported synthetic approaches, which can be categorized as interrupted Passerini/Ugi reactions. Besides, the clear goal of this review is to show the potential of these transformations, whilst highlighting the underexplored combinations of reagents toward the identification of novel interrupted Passerini/Ugi reactions.

1 Introduction

2 The Interrupted Ugi Reaction

2.1 The Interrupting Functional Group is Present on the Amine Reactant

2.2 The Interrupting Functional Group is Present on the Isocyanide Reactant

2.3 The Interrupting Functional Group is Present on the Carbonyl Reactant

3 The Interrupted Passerini Reaction

3.1 The Interrupting Functional Group is Present on the Carbonyl Reactant

3.2 The Interrupting Functional Group is Present on the Isocyanide Reactant

4 Conclusions and Future Outlook