... Advanced search. Other users also viewed these articles. Opens document download manager. Do not show again. Downloading zip file containing 3 articles... JavaScript is disabled on your browser. Please enable JavaScript to use all the features on this page. Tetrahedron Letters. Volume 31, Issue 11, 1990, Pages 1625–1628. Cover image Cover image. Intramolecular addition of Free radicals to quaternised heterocyclic rings. ...