Synlett 2021; 32(20): 2090-2096
DOI: 10.1055/a-1585-4490
letter

A [4+3] Cycloaddition Reaction of Aza-ortho-quinone Methides with C,N-Cyclic Azomethine Imines for Synthesis of 1,2,4-Triazepines

Authors

  • Xinyue Wang

  • Zefei Li

  • Chang Feng

  • Qi Zhen

  • Mingzhang Guo

  • Yaning Yao

  • Xinyu Zou

  • Pengfei Wang

  • Yunlei Hou

  • Ping Gong


We are grateful to the Program for Innovative Research Team of the Ministry of Education, The Program of Liaoning Revitalization Talents Program (XLYC1808037).


Graphical Abstract

Abstract

The base-induced formal [4+3] cycloaddition reaction of C,N-cyclic azomethine imines with aza-ortho-quinone methides, generated in situ, is reported. This protocol provided an efficient method for the synthesis of biologically important 1,2,4-triazepine derivatives, with a wide substrate scope and excellent functional-group tolerance, and it gives moderate to excellent yields under mild conditions. Several of the derivatives exhibited in vitro antitumor activities against the A2780 cell line in a screening of the cancer cell lines HCT-116, H2228, and A2780 by an MTT assay.

Supporting Information



Publication History

Received: 08 July 2021

Accepted after revision: 12 August 2021

Accepted Manuscript online:
12 August 2021

Article published online:
24 August 2021

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