Connecting Hindered Amines with Aminoxyl Radicals. I. One-Step Synthesis of Spin-Labelled Esters

Abstract

This paper introduces a one-step procedure of general use for obtaining spin-labeled esters. The method implies base-catalyzed transesterification of methyl esters of fatty acids, aromatic acids, hydroxyaromatic acids, unsaturated acids, etc. with paramagnetic alcohols (e.g. 1–3)^I-l resulting in a vast array of new and known aminoxyl esters.

Key Words:

• Hindered arnines
• aminoxyl radicals
• estlls
• ESR
• spin-labelling