1. cited therein a;Bartlett;Chem SOC Tetrahedron Letr,1980
2. a De Mesmaeker a;Yumoto;Chem Soc Synlett Synlett Tetrahedron Lett,1994
3. a;Monodentate;Org Chem,1994
4. u g;Yoakim;Org Chem Org Chem,1994
5. a;Bidentate;Chem Chem Suc Chem Sac Chem Commun,1991