Patent ID: 7387751

Claim:
A method for preparing an organomagnesium compound, the method comprising: (a) providing a reagent having the general formula: R 1 (MgX) n .LiY wherein: n is 1 or 2; R 1 is a substituted or unsubstituted C 4 -C 24 aryl or C 3 -C 24 heteroaryl, containing one or more heteroatoms selected from the group consisting of B, O, N, S, Se, P, F, Cl, Br, I, and Si; linear or branched, substituted or unsubstituted C 1 -C 20 alkyl, C 2 -C 20 alkenyl or C 2 -C 20 alkinyl; or substituted or unsubstituted C 3 -C 20 cycloalkyl; and X and Y are independently or both Cl, Br or I, HalO m , where m=3 or 4; carboxylate of formula RCO 2 ; alkoxide or phenoxide of formula RO; dialkoxide of formula LiO—R—O; disilazide of formula (R 3 Si) 2 N; thiolate of formula SR, RP(O)O 2 , or SCOR, where R is R 1 as defined above; linear or branched substituted or unsubstituted C 1 -C 20 alkyl or C 3 -C 20 cycloalkyl amine of formula RNH; dialkylamine or diarylamine of formula R 2 N, where R is defined as above or R 2 N represents a heterocyclic alkylamine; phosphine of formula PR 2 , where R is defined as above or PR 2 represents a heterocyclic phosphine; O p SR, where p=2 or 3 and R is defined as above; or NO q , where q=2 or 3; or X=R 1 as defined above; (b) providing a compound having the general formula R 2 A, wherein: R 2 is a substituted or unsubstituted metallocene; or R 2 is R 1 , wherein R 1 is as defined above, provided that R 2 and R 1 are not identical; and A is H, Cl, Br, I; a group of the general formula S(O) r -R 3 , wherein r=0, 1, or 2; a group of the general formula P(O)R 3 2 , where P(O)R 3 2 is a heterocyclic phosphinoxide or each R 3 is independently R 1 as defined above; and (c) reacting the compounds provided in steps (a) and (b), whereby an organomagnesium compound is prepared having the general formula R 2 (MgX) n .LiY.