... Please enable JavaScript to use all the features on this page. Tetrahedron Letters. Volume 34, Issue 48, 26 November 1993, Pages 7781–7784. ... 3; M. Canas, M. Poch, X. Verdaguer, A. Moyano, MA Pericàs, A. Riera; Tetrahedron Lett., 32 (1991), p. 6931. ... New York, Vol 5, Chapter ...