Supramolecular Photodimerization of Coumarins

Supramolecular photodimerization of coumarins.

Stereoselective photodimerization of coumarin and its derivatives in supra-molecular systems is reviewed. The enantioselective photodimerization of coumarin and thiocoumarin in inclusion crystals with optically active host compounds is also described.

Supramolecular photocatalysis: insights into cucurbit[8]uril catalyzed photodimerization of 6-methylcoumarin.

Guest induced shape change of the cucurbit[8]uril cavity is likely rate limiting in the supramolecular photocatalytic cycle for CB8 mediated photodimerization of 6-methylcoumarin.

Supramolecular photocatalysis: insights into cucurbit[8]uril catalyzed photodimerization of 6-methylcoumarinwz

Synthesis of Functionalized Coumarins

The synthesis of functionalized 2-oxo-2H-coumarin derivatives has been studied by a one-pot reaction of o-hydroxybenzaldehyde, ethyl 2-bromoacetate and triphenylphosphine in the presence of catalytic amount of triethyl amine in EtOAc, water or under solvent free conditions. We have found the best results obtained under solvent free condition.

Self-assembly of L-glutamate based aromatic dendrons through the air/water interface: morphology, photodimerization and supramolecular chirality.

A series of dendrimers containing focal aromatic rings, ranged from phenyl, naphthyl, anthryl to pyrenyl, and the l-glutamate peripheral groups were designed and their self-assembly through the air/water interface was investigated. It has been found that although these dendrimers have no long alkyl chains, some of the dendrimers could form stable monolayers at the air/water interface due to an ...