Cyclopropylacetylene
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Danger
H225: Highly Flammable liquid and vapor [Danger Flammable liquids]
P210, P233, P240, P241, P242, P243, P264, P264+P265, P273, P280, P302+P352, P303+P361+P353, P305+P354+P338, P317, P321, P332+P317, P362+P364, P370+P378, P403+P235, and P501 (click each P-code to see the statement)
Danger
H225 (96.1%): Highly Flammable liquid and vapor [Danger Flammable liquids]
P210, P233, P240, P241, P242, P243, P264, P264+P265, P273, P280, P302+P352, P303+P361+P353, P305+P354+P338, P317, P321, P332+P317, P362+P364, P370+P378, P403+P235, and P501 (click each P-code to see the statement)
Flam. Liq. 2 (96.1%)
Flam. Liq. 2 (85.7%)
Flammable liquid - category 2
Flam. Liq. 2
使用Cyclopropylacetylene is used as an organic chemical synthesis intermediate.
製造方法Cyclopropylacetylene was prepared in a two-step procedure by dichlorination of cyclopropyl methyl ketone with phosphorus pentachloride (PCl5) followed by double dehydrohalogenation with a strong base. This sequence presented significant scale-up problems with low overall yields (20-25%). Similarly, cyclopropylacetylene has been prepared by base-induced dehydrohalogenation of bromovinylcyclopropane . Cyclopropylacetylene has also been prepared from the 1-trimethylsilyl derivative of cyclopropylacetylene, which was prepared by treatment of 5-chloro-1-trimethylsilyl-1-pentyne with lithium diisopropylamide at 78°C followed by warming to room temperature.
読み込み中…
化学的特性clear colorless to light yellow liquid