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Title:
PRODUCTION OF EIGHT-MEMBERED AND NINE-MEMBERED RING COMPOUND
Document Type and Number:
Japanese Patent JPH11255676
Kind Code:
A
Abstract:

To directly and efficiently obtain the subject compound that is useful as a synthetic intermediate for medicines and agrochemicals by coupling a specific metalla cyclopentadiene, a metal salt, and bis(halomethyl) aromatic compound.

(A) A metalla cyclopentadiene of formula I (R1-R4 are each H, alkyl, alkenyl, alkynyl, aromatic group, or the like; M is a transition metal, preferably a transition metal in the group 4 of the periodic table such as zirconium; L is a ligand; n is an integer of 0-4), (B) a metal salt such as copper chloride, copper bromide or the like and (C) a bis(halomethyl) aromatic compound of formula II or formula III (R5-R14 are idnependently same as R1; X1-X4 are independently a halogen) are allowed to react with each other to produce (D) an eight-membered or nine-membered ring compound. The compound of component A is prepared by reaction of the corresponding transition metal compound with an acetylene and the amount of the compound used here is preferably 0.5-10 equivalents based on the component C.


Inventors:
TAKAHASHI TAMOTSU
Application Number:
JP5839098A
Publication Date:
September 21, 1999
Filing Date:
March 10, 1998
Export Citation:
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Assignee:
NISSAN CHEMICAL IND LTD
International Classes:
C07C13/32; C07C1/32; C07C13/54; (IPC1-7): C07C13/32; C07C1/32; C07C13/54



 
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