Method of polymerizing .alpha.,.omega.-diynes

Details Method of polymerizing .alpha.,.omega.-diynes Method of polymerizing .alpha.,.omega.-diynes

1988-10-17

1989-10-31

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By ring formation from nonring moiety, e.g., aromatization,...

585 27, C07C 1202

Patent

active

048779172

ABSTRACT:
A method of cyclization of .alpha.,.omega.-diynes with a transition metal catalyst such as niobium or tantalum salts such as halogen to yield products such as dimers trimers and higher polymers which may have benzo cyclobutene groups, benzocyclopentene groups, benzocyclohexene groups, or none of these, depending on the size of n in the .alpha.,.omega.-diynes of the formula of page 1.

REFERENCES:
patent: 2990434 (1961-06-01), Smith
Accounts of Chemical Research, vol. 10, #1, Jan. 1977, pp. 1-8; "Transition-Metal-Catalyzed Acetylene Cyclizations in Organic Synthesis".

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