... Please enable JavaScript to use all the features on this page. Tetrahedron Letters. Volume 41, Issue 25, 19 June 2000, Pages 4933–4936. Cover image Cover image. ... J. Gen. Chem.1965, 35, 1062–1063. 3. Katritzky, AR; Sengupta, S. Tetrahedron Lett.1987, 5419–5422. ...