Synthesis 2023; 55(15): 2343-2352
DOI: 10.1055/a-2022-1511
paper
Special Issue dedicated to Prof. David A. Evans

Synthesis of Polycyclic Imidazoles via α-C–H/N–H Annulation of Alicyclic Amines

Subhradeep Dutta
,
Kamal Bhatt
,
Fabian Cuffel
,
Daniel Seidel
Financial support from the National Institutes of Health–National Institute of General Medical Sciences (NIH–NIGMS, grant no. R01GM101389) is gratefully acknowledged. Mass spectrometry instrumentation was supported by a grant from the NIH (S10 OD021758-01A1).


Abstract

Secondary alicyclic amines are converted into their corresponding ring-fused imidazoles in a simple procedure consisting of oxidative imine formation followed by a van Leusen reaction. Amines with an existing α-substituent undergo regioselective ring-fusion at the α′-position. This method was utilized in a synthesis of fadrozole.

Supporting Information



Publication History

Received: 18 November 2022

Accepted after revision: 30 January 2023

Accepted Manuscript online:
30 January 2023

Article published online:
13 April 2023

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