Prepn: Fensch, Finkenbrink, DE 1002341 (1957 to Hoechst); Hoch, Clegg, J. Am. Chem. Soc. 81, 5413 (1959); US 2951098 (1960 to Hooker). Synthesis of the trans-isomer: I. Schuphan, G. Tlg, Tetrahedron Lett. 1969, 3389.
This monograph has been retired and is no longer subject to revision or update.