... 5. b); TI Reddy, BM Bhawal, S. Rajappa; Tetrahedron, 49 (1993), p. 2101. ... The filtration of zeolite and removal of solvent under reduced presure affords the olefinic product in 87 % yield (114 mg., mp 159 °C). 12. 17. a); M. Czjzek, T. Vogt, H. Fuess; For the electrostatic interactions between the rare-earth cations and included organic guests in supercages, see: Angew. Chem. Int. Ed. Engl., 28 (1989), p. 770. ...