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United States Patent 5,384,078
RiekeJan. 24, 1995

Soluble highly reactive form of calcium and reagents thereof

Inventors: Rieke; Reuben D. (Lincoln, NE).
Assignee: Board of Regents of the University of Nebraska (Lincoln, NE).
Appl. No.: 167,726
Filed: Dec. 15, 1993

Intl. Cl.:C07F 3/04; C07D 305/00; C07D 309/00; C07C 2/02;
U.S. Cl.:260/665.R; 549/263.;
Field of Search:665 R

References Cited

U.S. Patent Documents
4,069,267Jan., 1978Kamienski et al. 260/665 R
4,087,468May, 1978Solomon 568/807
4,166,898Sept., 1979Kambe 528/405
4,325,840Apr., 1982Malpass 252/431 R
4,396,554Aug., 1983Robinson et al. 260/665 R
4,731,203Mar., 1988Bogdanovic 260/665 G
5,211,886May, 1993Rieke 260/665 R
5,231,205Jul., 1993Rieke

Foreign Patent Documents
2027257Apr., 1991CAX

Other References

Primary Examiner: Prescott; Arthur C.


A soluble highly reactive form of calcium, prepared from Ca(II) salts and a reducing agent in ethereal, polyethereal, or hydrocarbon solvents, is presented. This form of calcium can be used in the preparation of organocalcium reagents. The organocalcium reagents resulting from the reaction of the soluble highly reactive calcium with organic compounds containing either halide, cyanide, a 1,3-diene, or a polyunsaturated functionality, are stable, useful reagents for organic synthesis. The organocalcium halide reagents undergo Grignard-type reactions. They also undergo reactions with Cu(I) salts to form organocalcium cuprate reagents. The organocalcium cuprate reagents undergo a variety of cross-coupling reactions. The soluble highly reactive calcium reacts with 1,3-dienes to yield the corresponding 2-butene-1,4-diylcalcium complexes. These bis-organocalcium reagents can undergo dialkylation reactions with .alpha.,.omega.-alkylene dihalides and dichlorosilanes to form the corresponding 3-, 5-, and 6-membered ring derivatives. The soluble highly reactive calcium also reacts with organic dihalides to form mono- or diorganocalcium compounds which can be converted into a wide variety of polymers.

35 Claims, No Drawings

Government Interest


The present invention was made with government support under Contract No. GM35153 awarded by the National Institute of Health. The Government has certain rights in this invention.

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