... Please enable JavaScript to use all the features on this page. Tetrahedron Letters. Volume 38, Issue 21, 26 May 1997, Pages 3675–3678. ... Tetrahedron Lett. (1995), pp. 4155–4158. ... in: L. Echegoyan, AE Kaifer (Eds.), NATO ASI Ser. C., Vol. 485 (1996), pp. 115–126. ...