Catalytic dehydroxylation of diols and polyols

Details Catalytic dehydroxylation of diols and polyols Catalytic dehydroxylation of diols and polyols

C - Chemistry, Metallurgy

07

C

C07C 29/60 (2006.01)

Patent

CA 2407500

Secondary alcohols, specifically diols and polyols, are dehydroxylated to the corresponding primary alcohols using hydrogen in the presence of a ruthenium- containing catalyst precursor having the formula {[CpRu(CO)2]2(µ-H)}+Q- or {[CpRu(CO)(PR'3)]2(µ-H)}+Q- or {[ZRu(L)]2(µ-H)+Q-; wherein Q- is a non- coordinating or weakly coordinating nonreactive anion; Cp is an optionally substituted cyclopentadienyl group; R' is selected from hydrogen, alkyl, aryl and aryloxy; Z is hydridotris(3,5-dimenthylpyrazolyl)borate or hydrocarbyl hydridotris (3,5-dimethylpyrazolyl)borate; and L is (CO)2 or 1,5- cyclooctadiene.

Des alcools secondaires et notamment des diols et polyols sont déshydroxylés en alcools primaires correspondants au moyen d'un catalyseur complexe à base de ruthénium organométallique homogène.

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