... Tetrahedron Letters. Volume 35, Issue 19, 9 May 1994, Pages 3175–3178. Cover image Cover image. ... References. 1; a) AS Rao, SK Paknikan, JG Kirtane; Tetrahedron, 39 (1983), p. 2323. ... Alan R. Katritzky and Charles W. Rees, Pergamon Press, New York, Vol. 2, Part 2A, pg. ...