Synthesis of Biologically Active [2.2]Paracyclophanes
作者:Ashraf A. Aly、Alaa A. Hassan、Aboul-Fetouh E. Mourad、Henning Hopf
DOI:10.1002/ardp.19923251002
日期:——
Claisen reaction of 4‐acetyl[2.2]paracyclophane (1) with ethyl acetate and diethyl oxalate affords 4‐acetoacetyl[2.2]paracyclophane (2) and ethyl(4‐oxaloacetyl[2.2]paracyclophane) (6), respectively. Reaction of 2 and 6 with hydrazines and CuCl2 gave the pyrazole derivatives 4 and 8 in addition to the metal complexes 5 and 9. Mannich reaction of 2 with benzylamine and paraformaldehyde yielded the piperidinone