|
Figure 1 Michael addition of bis(benzo)-(β,β′-diphenyl-γ-piperidono)aza-14-crown-4 ether to dimethyl acetylenedicarboxylate. |
|
Figure 1 Michael addition of bis(benzo)-(β,β′-diphenyl-γ-piperidono)aza-14-crown-4 ether to dimethyl acetylenedicarboxylate. |