Method for photocatalytic isomerization of...

Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – By double-bond-shift isomerization

Reexamination Certificate

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C585S665000, C585S670000, C585S671000

Reexamination Certificate

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07939703

ABSTRACT:
The present invention relates to methods for accelerating the trans-cis isomerization of 1,2-diphenylethylene analogues by using photocatalyst. According to this invention, in the presence of polypyridyl platinum(II) complex with catalytic dosage, a solution containing trans-1,2-diphenylethylene analogues or mixture of cis- and trans-1,2-diphenylethylene analogues is irradiated by visible light to prepare product of cis-1,2-diphenylethylene analogues or product predominantly being cis-1,2-diphenylethylene analogues under inert gas atmosphere. This method has the advantages of fast reaction, high performance, easy separation of reaction system and recycle of the polypyridyl platinum (II) complexes.

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