Synthesis of diethynylbenzene

Details Synthesis of diethynylbenzene Synthesis of diethynylbenzene

1990-03-26

1991-03-05

Garvin, Patrick P.

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

To produce aromatic

585409, 585464, C07C 500

Patent

active

049979914

ABSTRACT:
The invention provides an inexpensive synthesis process for preparation of diethynylbenzene monomers that are useful in the preparation of polyacetylenes. This process provides for the preparation of thermally sensitive monomers in a one-pot reaction using readily available materials at low temperatures in an environment capable of absorbing large amounts of energy. Divinylbenzene is first brominated and then dehydrobrominated with sodium hydroxide or potassium hydroxide preferably in the presence of a phase transfer agent followed by distillation to recover the diethylnylbenzene product.

REFERENCES:
patent: 3594423 (1971-07-01), Relles
patent: 3696158 (1972-10-01), Relles
patent: 3758622 (1973-09-01), Watson
patent: 4120909 (1978-10-01), Amirnazmi
patent: 4665246 (1987-05-01), Anderson
84 Chem. Abstracts, 105119 (1976).
Journal of Organic Chemistry, 2489-2496, vol. 53, (1988).
Journal of Organic Chemistry, 2493-2494, vol. 47 (1982).

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