Formation of an Organometallic Ladderane Derivative by Dynamic Topochemical Reaction Control

Recent Advances in the Synthesis of Cyclobutanes by Olefin [2 + 2] Photocycloaddition Reactions

“… A related behavior was observed for alkenyl-substituted lithium cyclopentadienides . Even a ladderane structure could be generated by employing a bis­(butadienylcyclopentadienyl)zirconium complex . Iwama et al showed that intramolecular [2 + 2] photocycloaddition reactions are possible between two double bonds in bridged bis­(azulenyl) zirconocenes …”

Stepwise ligand transformations through [2+2] photodimerization and hydrothermal in situ oxidation reactions

“…In recent years, controlling the course of chemical reactions by using ordered media has aroused great interest. [1][2][3][4][5][6] Within the confined space of ordered media, specific reactions may be favored that do not occur or are not dominant in the absence of constraints relating to the orientation and separation of reacting molecules. In this regard, the ordered structure within crystalline coordination polymers may be exploited to preorganize substrates in a manner that allows the formation of tailor-made products.…”

“…Within a crystal of 1, one half of the olefinic molecules are converted to HT-ppcb molecules in 2. The HT-ppcb ligand, which was subsequently isolated, was shown to undergo a further transformation to a rare furan-based ligand, 2,4-bis(4-pyridyl)-3,5bis(phenyl)furan (bpbpf), in a hydrothermal reaction that yields a novel coordination polymer {[Cd(H 2 O)(1,3-bdc)(bpbpf)]ÁH 2 O} n (3).…”

Formation of Functional Cyclooctadiene Derivatives by Supramolecularly‐ Controlled Topochemical Reactions and Their Use as Highly Selective Fluorescent Biomolecule Probes†

“…[ 5‐7 ] Therefore, controlling the regio‐ and stereochemistry of the photoproducts is far more challenging for polyenes than for monoalkenes. [ 8,9 ] Recently, we developed a strategy for the preparation of a series of polyimidazolium cyclobutane derivatives by applying metal‐carbene template‐directed [2+2] cycloaddition reactions in homogeneous solution. [ 10,11 ] We expected this method to be applicable for the construction of functional molecules of increasing structural complexity; our goal was not only to utilize this metal‐carbene‐templated photochemical reaction to generate new complexes but also to produce functional receptors for biomolecular sensing.…”