Synlett 2021; 32(19): 1974-1980
DOI: 10.1055/a-1642-0598
letter

1,3-Dipolar [3+3] Cycloaddition of 1,4-Benzodiazepinone-Based Nitrones with α-Halohydroxamates for Diastereoselective Synthesis of Novel d-Edge Heterocycle-Fused 1,4-Benzodiazepinones

Heng Zhang
,
Lu-Yu Cai
,
Zhe Tang
,
Xiao-Zu Fan
,
Hui-Hui Wu
,
Xiao-Fan Bi
,
Hong-Wu Zhao
We thank the Beijing Municipal Commission of Education (JC015001200902), the Beijing Municipal Natural Science Foundation (7102010, 2122008, and 2172003), the Basic Research Foundation of Beijing University of Technology (X4015001201101), the Funding Project for Academic Human Resources Development in Institutions of Higher Learning Under the Jurisdiction of Beijing Municipality (PHR201008025), the Doctoral Scientific Research Start-up Foundation of Beijing University of Technology (52015001200701) for financial supports.


Abstract

Promoted by K2CO3 (2.0 equiv), the 1,3-dipolar [3+3] cy­cloaddition between 1, 4-benzodiazepinone-based nitrones and α-halohydroxamates processed smoothly under the mild reaction conditions and delivered structurally novel and complex cis- or trans-configured d-edge heterocycle-fused 1,4-benzodiazepinones in up to >99% isolated yield with >20:1 dr. The relative configuration of the title chemical entities was clearly identified with the use of single-crystal X-ray structure analysis. The reaction mechanism was assumed to interpret the diastereoselective production of the obtained cis- or trans-configured d-edge heterocycle-fused 1,4-benzodiazepinones.

Supporting Information



Publication History

Received: 27 July 2021

Accepted after revision: 09 September 2021

Accepted Manuscript online:
09 September 2021

Article published online:
01 October 2021

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