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1,5-Diphenylpent-4-en-2-yn-1-one is an organic compound characterized by a unique molecular structure consisting of a pent-4-en-2-yn-1-one backbone, with two phenyl groups attached at the 1st and 5th carbon atoms. This conjugated enyne system features a triple bond at the 2nd carbon and a double bond at the 4th carbon, which can participate in various chemical reactions, such as cycloadditions and electrophilic substitutions. The compound is known for its potential applications in the synthesis of pharmaceuticals, agrochemicals, and other specialty chemicals due to its versatile reactivity and structural properties.

1676-65-9

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1676-65-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1676-65-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,7 and 6 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1676-65:
(6*1)+(5*6)+(4*7)+(3*6)+(2*6)+(1*5)=99
99 % 10 = 9
So 1676-65-9 is a valid CAS Registry Number.

1676-65-9Relevant academic research and scientific papers

Cyclization of 1-Aryl-5-Phenylpent-4-en-2-yn-1-Ones to 2,3-Dihydropyran-2-Ones in Trifluoromethanesulfonic Acid

Zalivatskaya, Anna S.,Golovanov, Aleksander А.,Vasilyev, Aleksander V.

, p. 953 - 956 (2020/08/26)

[Figure not available: see fulltext.] Under the action of an excess of trifluoromethanesulfonic acid, 1-aryl-5-phenylpent-4-en-2-yn-1-ones cyclize intramolecularly to 6-aryl-2-phenyl-2,3-dihydropyran-4-ones. The reaction proceeds at room temperature for 1

(Benzoyliodomethyl)triphenylphosphonium Iodide: A Convenient Reagent for Direct Synthesis of Arylethynyl Phenyl Ketones by Chain Extension of Aldehydes

Iman, Manoutcher,Bouyssou, Pascal,Chenault, Jacques

, p. 631 - 632 (2007/10/02)

Reaction between (benzoyliodomethyl)triphenylphosphonium iodide, potassium carbonate and various aromatic aldehydes in a liquid-solid two-phase system, gives arylethynyl phenyl ketones in good yield.

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