... JavaScript is disabled on your browser. Please enable JavaScript to use all the features on this page. Tetrahedron. Volume 48, Issue 27, 3 July 1992, Pages 5557–5564. Cover image Cover image. ... Received 8 January 1992, Available online 17 July 2003. Abstract. ... 1.(b); D. Seebach, B. Weidman, L. Widler; R. Sheffold (Ed.), Modern Synthetic Methods, Vol. III, Otto Salle Verlag and Verlag Sauerlander Publishers, Aarau (1983), pp. 217–353. ...