3-Bromopropyne-1-ol 、 1,5-己二炔 以to give two products, 2,4,8-nonatriyne-1-ol (I) and 2,4,8,10-dodecatetrayne-1,12-diol (II), which的产率得到Nona-2,4,8-triyn-1-OL
Compositions containing at least two conjugated acetylene groups (-C.tbd.C-C.tbd.C-) are suitable as integral time-temperature history indicators. These compositions exhibit sequences of irreversible color changes at combinations of times and temperatures specific to each composition. Thus, when supported on the surface of a product or on a substrate affixed to a product, they are useful for indicating whether a perishable (e.g., foodstuff, pharmaceutical, chemical, etc.) has been exposed to an undesirable time-temperature history that results in substantial degradation of the perishable or whether a product has been exposed to a desirable time-temperature history during processing (e.g., the sterilization of a foodstuff or biomedical material).