Synthetic Entry to the 2-Azatricyclo[4.3.2.04,9]undecane Ring System via Tropone

J Org Chem. 2020 Feb 21;85(4):2202-2212. doi: 10.1021/acs.joc.9b02921. Epub 2020 Jan 16.

Abstract

A synthesis of the 2-azatricyclo[4.3.2.04,9]undecane ring system-a hitherto unreported bridged azatricyclic ring system-beginning from tricarbonyl(tropone)iron and allylamine was accomplished in three steps: (1) aza-Michael addition of allylamine to tricarbonyl(tropone)iron; (2) Boc-protection of the resulting secondary amine; and (3) oxidative demetallation leading to a spontaneous intramolecular Diels-Alder reaction. The effect of a variety of parameters on the intramolecular Diels-Alder reaction was investigated, including diene and dienophile substitution patterns and dienophile tether length.

Publication types

  • Research Support, Non-U.S. Gov't