Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1990-03-12
1991-10-22
Scalzo, Catherine S. Kilby
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
556406, C07D52100
Patent
active
050596950
ABSTRACT:
The stereochemical structure necessary for preparation of perpendicularly arranged cores is provided by a compound of the formula ##STR1## wherein X is a reactive group through which polymeric subunits can be bonded to the compound. In particular, X is advantageously Br. This compound can be synthesized by the reaction of tetrakis(3'-trimethylsilyl-2'-propynyl)silane with zirconocene dichloride and n-butyllithium and adding sulfur monochloride to the reaction product. This produces an adduct in which X is SiMe.sub.3. This adduct may be converted to the bromo compound by reaction with bromine. The tetrakis(3'-trimethylsilyl-2-propynyl)silane may be prepared by forming a magnesium Grignard reagent from 3-bromo-1-trimethylsilylpropyne and reacting the Grignard reagent with silicon tetrachloride.
REFERENCES:
Aviram, J. Am. Chem. Soc. 110 (1988), pp. 5687-5692.
Negishi, J. Am. Chem. Soc. 111 (1989), pp. 3336-3346.
Fagan, J. Am. Chem. Soc. 110 (1988), pp. 2310-2312.
Negishi, Heterocycles (1982), 18, pp. 117-122.
Schumm Jeffry S.
Tour James M.
Wu Ruilian
Kilby Scalzo Catherine S.
The University of South Carolina
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