1. cc;Trost;Chem Res Jebaratnam Tetrahedron Lett,1990
2. unpublished work in these laboratories Also see;Tucker;Am Chem SOC,1989
3. for the exciting challenges they bring and the realization of all the chemistry REFERENCES;Trost;Science,1991
4. unpublished work in these laboratories see;Caringi;Am Chem SOC,1987