Patent ID: 8604201

Claim:
A method for the preparation of a complex comprising contacting metallic copper or copper derivative, with a cyclovinyl phosphine of formula (I): in which formula: R a and R b , which are identical or different, each represent a radical independently selected from alkyl, aryl, heteroaryl, monoalkylamino, dialkylamino, alkoxy, aryloxy, heteroaryloxy, or a radical —CR 1 ═CHR 2 —CHR 3 ═CR 4 R 5 ; R 1 is hydrogen, or alkyl; R 2 and R 3 , which are identical or different, are selected independently from the group consisting of hydrogen, a hydrocarbon radical, an aryl radical, and a heteroaryl radical; and the ring Y represents a mono-, bi- or tri-cyclic nucleus comprising: a total of 5 to 20 members; optionally one or more heteroatoms selected from nitrogen, oxygen, sulfur, and phosphorus; and optionally one or more other intracyclic double bonds; said ring Y is optionally substituted by one or more chemical species selected from alkyl-G-, alkenyl-G-, alkynyl-G-, aryl-G-, heteroaryl-G- (where G represents a bond, the oxygen atom or the sulfur atom), halogen, —NO 2 , —NH 2 , —CN, and PR a R b , where R a and R b are as defined above.