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Ten ble(propynoyloxy) aromatice were prepared, In yields ranging from 28% to 88%, from propynoyl chloride and the dleodlum salt of the corresponding dlhydroxy aromatic. The structures of these ethynyl compounds were confirmed by IR, 1H NMR, and DSC.Ethynyl groups have received much attention as a function capable of thermal chain extension and cross-linking by an addition process. Many ethynyl or acetylene-terminated (AT) aromatic systems show promise for uses in composite applications because they have been shown or proposed to form highly cross-linked matrices when heated above 200 °C (1-6).

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ChemInform Abstract Compounds of type (III) may form highly cross-linked matrices when they are heated above 200 rc C.