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DOI: 10.1055/a-1543-3924
Visible-Light Photocatalytic Ugi/Aza-Wittig Cascade towards 2-Aminomethyl-1,3,4-oxadiazole Derivatives
Financial support from Università degli Studi di Napoli Federico II and Università del Piemonte Orientale, Novara, Italy is acknowledged. M. G. acknowledges PROGEMA support (ARS01_X00432, PON R&I 2014-2020). R. C. acknowledges support from Ministero dell’Istruzione, dell’Università e della Ricerca (MIUR; Italian Ministry of Education, University and Research), PON R&I 2014-2020-AIM (Attraction and International Mobility), project AIM1873131 - Num. Attività 2 - Linea 2.1.

Abstract
A new visible-light photocatalytic multicomponent reaction (MCR) involving N-alkyl-N-methylanilines, N-isocyanoiminotriphenylphosphorane, and carboxylic acids leading to 1,3,4-oxadiazole derivatives is reported. The developed mild reaction conditions enable a broad substrate scope and good functional group tolerance, as further highlighted in the late-stage functionalization of amino acids and drugs. Additionally, a two-step one-pot protocol for the synthesis of non-symmetrical diacylhydrazines is also reported.
Key words
photoredox catalysis - isocyanide chemistry - Ugi reaction - aza-Wittig reaction - multicomponent reactions - 1,3,4-oxadiazolesSupporting Information
- Supporting information for this article is available online at https://doi.org/10.1055/a-1543-3924.
- Supporting Information
Publication History
Received: 14 May 2021
Accepted after revision: 02 July 2021
Accepted Manuscript online:
02 July 2021
Article published online:
13 August 2021
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