ChemicalBook CAS DataBase List 1-PENTYNE

1-PENTYNE synthesis

11synthesis methods

Product Name:1-PENTYNE
CAS Number:627-19-0
Molecular formula:C5H8
Molecular Weight:68.12

3234-49-9
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627-19-0
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Yield:627-19-0 80.9%

Reaction Conditions:

with Aliquat 336;potassium hydroxide in water at 120; for 7 h;

Steps:

1 Synthesis of 1-pentyne
Into a 250mL round-bottom flask, add 151.2g water, 16.8g (0.3mol) KOH, and 0.46g methyltrioctylammonium chloride, warm to the reaction temperature of 120°C, and add 23.0g (0.1mol) 1,2-dibromopentanedropwise while stirring, reaction time 7h,After the reaction was completed, gas chromatography analysis showed a conversion rate of 100% and a selectivity of 86.8%. The phases were separated. The upper organic phase was washed with saturated brine, dried over anhydrous sodium sulfate, and distilled to obtain the product as a colorless transparent liquid, 5.5g , The yield is 80.9%.

References:

Xi'an Modern Chemical Institute;Zhang Jianwei;Lv Jian;Li Jiangwei;Wang Zhixuan;Sun Daoan;Du Yongmei;Li Chunying;Wang Qian;Li Jiaoyi;Xue Yunna;Kou Liangang CN110981678, 2020, A Location in patent:Paragraph 0019-0021

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1066-26-8 Synthesis