ChemicalBook CAS DataBase List Cyclopropene

Cyclopropene synthesis

8synthesis methods

Product Name:Cyclopropene
CAS Number:2781-85-3
Molecular formula:C3H4
Molecular Weight:40.06

Cyclopropane, 1-chloro-2-(trimethylsilyl)-

159395-10-5
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2781-85-3
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Yield:-

Reaction Conditions:

15 % TBAF/SiO2 in diethyl ether

Steps:

4.2
(2) Preparation of Cyclopropene 100 g of 75% aqueous tetrabutylammonium fluoride (Bu₄NF) solution was added to 500 mL of methanol, and the solution was homogeneously mixed with 425 g of finely ground silica gel powder. The mixture was heated to 80° C. to distill off solvent under vacuum thoroughly. 5 g of the thus treated and thoroughly dried silica gel (Bu₄NF 15% on Silica gel) was filled in a hollow glass rod, and both ends of the glass rod were tightly plugged with cotton. In order to induce an air flow inside the glass rod in one direction, the air flow was maintained at a flow rate of 100 mL /min, by installing a small compressor at one end of the glass rod. 2.0 mL of the ethyl ether solution containing 10% of 1-chloro-2-(trimethylsilyl)cyclopropane, synthesized in Section (1), was simultaneously injected into an air inlet of the glass rod using a syringe. Gas discharged from the opposite end of the glass rod was collected for 1 hour, and constituents of the gas were analyzed using GC/MS analysis system. It was confirmed that the collected gas contained cyclopropene (MW: 40).

References:

YOO, Sang-Ku US2012/130104, 2012, A1 Location in patent:Page/Page column 6

107-05-1 Synthesis