... Tetrahedron. Volume 42, Issue 6, 1986, Pages 1665-1677. Cover image. ... 27 K. Ziegler, Methoden der Organischen Chemie C, Teil II, Houben-Weyl) (Edited by E. Miiller), Vol. IV/2. Thieme, Stuttgart (1955). 28 F. Viigtle and P. Neumann, Tetrahedron 26, 5847 (1970). ...