Synthesis 2023; 55(09): 1410-1418
DOI: 10.1055/s-0042-1751409
paper

Enantioselective Synthesis of Diazobicyclic Oxadiazines via Organocatalytic [3+3]-Cycloaddition of γ-Hydroxy-α,β-Unsaturated Carbonyls with N,N′-Cyclic Azomethine Imines

Sung Hyun Kang
,
Byung Jun Park
,
Sung-Gon Kim
This research was supported by Kyonggi University Research Grant 2021.


Abstract

A diastereo- and enantioselective synthesis of diazobicyclic oxadiazines was developed through an organocatalytic cycloaddition reaction. Asymmetric catalytic [3+3]-cycloaddition of γ-hydroxy-α,β-unsaturated carbonyls with N,N′-cyclic azomethine imines, using a squaramide-based catalyst, provided biologically important enantioenriched diazobicyclic oxadiazines in good yields with moderate to high diastereo- and enantioselectivities (up to 10:1 dr and 79:21 er).

Supporting Information



Publication History

Received: 30 October 2022

Accepted after revision: 21 December 2022

Article published online:
24 January 2023

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