Isomerization of isolated double bonds to conjugated double bond

Details Isomerization of isolated double bonds to conjugated double bond Isomerization of isolated double bonds to conjugated double bond

1984-06-22

1985-04-23

Gantz, Delbert E.

Chemistry of hydrocarbon compounds

Alicyclic compound synthesis

By double-bond shift

585665, 585669, 585670, C07C 524

Patent

active

045131570

ABSTRACT:
In the isomerization of isolated double bonds to conjugated double bonds in optionally substituted cyclooctadienes, the isomerization catalyst comprises: (a) a transition metal compound of the formula Me(OR.sup.1).sub.4, wherein Me is Ti, Zr, or Hf, and R.sup.1 is C.sub.1-4 alkyl, and (b) an organoaluminum compound of the general formula AlR.sup.2.sub.3-n X.sub.n, wherein R.sup.2 is C.sub.1-4 alkyl, n is 0, 1, 2, or a fraction between 1 and 2, and X is halogen or, if n is 1, also hydrogen; the molar ratio of (a):(b) being in the range from 0.1 to 1:1, the catalyst having prolonged activity and the isomerization being conducted at a temperature of 50.degree.-200.degree. C.

REFERENCES:
patent: 3507928 (1970-04-01), Rinehart
patent: 4434310 (1984-02-01), Kampf

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