Rn. Warrener et al., PREPARATION OF NEW PORPHYRIN BLOCKS AND THEIR APPLICATION TO THE SYNTHESIS OF SPACER AND CAVITY RIBBON STRUCTURES, Synlett, (6), 1998, pp. 593
Fused-norbornene BLOCKs, formed by the condensation of porphyrin vic-d
iamines with polyalicyclic alpha-diones, have been used to produce mon
o-porphyrin systems linked to other effector units or new U-type cavit
y bis-porphyrins using ACE or s-tetrazine coupling protocols.