Synthesis 2022; 54(05): 1329-1338
DOI: 10.1055/a-1672-5707
paper

Enantioselective Construction of Multi-Nitrogen-Containing Spirocycles: Asymmetric [3+2] Annulation of 4-Isothiocyanato­pyrazolones with Azodicarboxylates

Shiqiang Wei
,
Wenyao Wang
,
Aiqi Xue
,
,
Jingping Qu
,
Baomin Wang
We thank the Fundamental Research Funds for the Central Universities (No. DUT21LAB134) for support of this work.


Abstract

The 4-isothiocyanatopyrazolones were exploited as a class of efficient synthons for the construction of triazoline derivatives via asymmetric [3+2] annulation with azodicarboxylates, providing a wide range of structurally diverse multi-nitrogen-containing spirocycles in excellent yields (up to 97%) with excellent enantioselectivities (up to 97% ee).

Supporting Information



Publication History

Received: 11 August 2021

Accepted after revision: 19 October 2021

Accepted Manuscript online:
19 October 2021

Article published online:
29 November 2021

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