Issue 31, 2023

Cu(i)-catalysed cross-coupling reaction of in situ generated azomethine ylides towards easy construction of fused N-heterocycles

Abstract

In this study, we have devised a new method for synthesizing highly valuable 5,6,7,8a-tetrahydropyrrolo[2,1-b]thiazoles using a decarboxylative C–N coupling reaction between phenyl glyoxal and proline or its analogue, which is catalyzed by CuI in the presence of K2CO3. This reaction is followed by a regiospecific C–C and C–S coupling cyclization with dialkyl trithiocarbonate. Furthermore, we have demonstrated that this cross-coupling method can also be extended to imines, leading to the formation of fused symmetrical and unsymmetrical 6,7-dihydro-5H-pyrrolo[1,2-a]imidazoles. This finding greatly expands the scope and versatility of the synthetic approach. Therefore, this work represents a significant contribution to the field of organic synthesis, providing a novel and efficient method for the preparation of fused N-heterocyclic compounds that could have useful applications in areas such as material science and pharmaceuticals.

Graphical abstract: Cu(i)-catalysed cross-coupling reaction of in situ generated azomethine ylides towards easy construction of fused N-heterocycles

Supplementary files

Article information

Article type
Communication
Submitted
13 Feb 2023
Accepted
22 Mar 2023
First published
22 Mar 2023

Chem. Commun., 2023,59, 4664-4667

Cu(I)-catalysed cross-coupling reaction of in situ generated azomethine ylides towards easy construction of fused N-heterocycles

S. A. Molla, D. Ghosh, A. Basak, S. Khamarui and D. K. Maiti, Chem. Commun., 2023, 59, 4664 DOI: 10.1039/D3CC00660C

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