... Please enable JavaScript to use all the features on this page. Tetrahedron Letters. Volume 42, Issue 5, 29 January 2001, Pages 831–833. Cover image Cover image. ... W. Ando, M. Ikeno; Tetrahedron Lett. (1979), p. 1979. 13. ... Coll. Vol. I, 1941; 2nd ed., p. 224. 17. ...