Diarylphenoxy aluminum compounds

Details Diarylphenoxy aluminum compounds Diarylphenoxy aluminum compounds

2006-03-03

2009-10-27

Witherspoon, Sikarl A (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S829000, C556S027000, C556S181000

Reexamination Certificate

active

07608742

ABSTRACT:
The present invention relates to diarylphenoxyaluminum compounds which are obtainable by reacting a bis(diarylphenol) ligand of the formula (I)with an alkylaluminum compound and/or a complex aluminum hydride.The invention moreover relates to the use of such diarylphenoxyaluminum compounds as catalysts.Moreover, the invention relates to a method of producing isopulegol by cyclization of citronellal in the presence of diarylphenoxyaluminum compounds as catalysts.The invention also relates to a method of producing menthol by cyclization of citronellal in the presence of diarylphenoxyaluminum compounds as catalysts and subsequent hydrogenation.

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