Crosslink-cyclized cyclopentadiene and dihalobis type metal compound containing same as ligand
AssigneeHonshu Chemical Industry Co., Ltd.
InventorKeiichi Yokoyama
Life of this patent
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Abstract
A process for producing a crosslink-cyclized cyclopentadiene, comprising the steps of reacting a cyclopentenone with an alkali metal hydride to thereby reduce the cyclopentenone (reduction step A) into a cyclopentenol; and reacting the cyclopentenol with a dehydrating agent to thereby dehydrate the cyclopentenol (dehydration step B) into a crosslink-cyclized cyclopentadiene of the general formula (III): 1 wherein each of R1 and R2 independently represents a hydrogen atom or a linear or branched saturated alkyl group having 1 to 6 carbon atoms, n is an integer of 3 to 10, and the broken line in the 5-membered ring denotes that the 5-membered ring has two double bonds.
Claims9
A process for producing a crosslink-cyclized cyclopentadiene, comprising the steps of:
- reacting a cyclopentenone of the general formula (I) with an alkali metal hydride;
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- wherein each of R1 and R2 independently represents a hydrogen atom or a linear or branched saturated alkyl group having 1 to 6 carbon atoms, and n is an integer of 3 to 10,
- to thereby reduce the cyclopentenone (reduction step A) into a cyclopentenol of the general formula (II):
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- wherein R1, R2 and n are as defined above;
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- reacting the cyclopentenol with a dehydrating agent to thereby dehydrate the cyclopentenol (dehydration step B) into a crosslink-cyclized cyclopentadiene of the general formula (III):
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- wherein R1, R2 and n are as defined above, and the broken line in the 5-membered ring denotes that the 5-membered ring has two double bonds.
A crosslink-cyclized cyclopentadiene of the general formula (IV):
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- wherein each of R1 and R2 independently represents a linear or branched saturated alkyl group having 1 to 6 carbon atoms, n is an integer of 3 to 10, and the broken line in the 5-membered ring denotes that the 5-membered ring has two double bonds.
A dihalobis(η-crosslink-cyclized cyclopentadienyl)metal compound of the general formula (V):
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- wherein each of R1 and R2 independently represents a linear or branched saturated alkyl group having 1 to 6 carbon atoms;
- n is an integer of 3 to 10;
- M represents Ti, Zr or Hf;
- and X represents a halogen atom selected from among a chlorine atom, a bromine atom, an iodine atom and a fluorine atom.
Dependencies are inferred from the claim text.