Synthesis 2021; 53(07): 1365-1371
DOI: 10.1055/s-0040-1705967
paper

DEAD-Mediated Oxidative Ugi/Aza-Wittig Reaction for the Synthesis of 5-(1,2,3,4-Tetrahydroisoquinolin-1-yl)-1,3,4-oxadi­­azoles Starting from (N-Isocyanimine)triphenylphosphorane

Mei Sun
,
Long Zhao
,
Yan-Ling Yu
,
Ming-Wu Ding
We gratefully acknowledge financial support of this work by the National Natural Science Foundation of China (No. 21572075) and the 111 Project B17019.


Abstract

A one-pot protocol for the synthesis of 5-(1,2,3,4-tetra­hydroisoquinolin-1-yl)-1,3,4-oxadiazoles via DEAD-mediated oxidative Ugi/aza-Wittig reaction has been developed. The reaction of (N-iso­cyanimine)triphenylphosphorane, carboxylic acids, and N-aryl-1,2,3,4-tetrahydroisoquinolines produced polysubstituted 5-(1,2,3,4-tetra­hydroisoquinolin-1-yl)-1,3,4-oxadiazoles directly in good yields in the presence of DEAD as an oxidant.

Supporting Information



Publication History

Received: 09 September 2020

Accepted after revision: 08 October 2020

Article published online:
10 November 2020

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