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2-(4-fluorobenzyl)-1-(pyrrolidin-1-yl)pent-4-en-1-one is a complex organic compound with the molecular formula C17H20FNO. It features a pent-4-en-1-one core structure, which is a five-carbon chain with a double bond between the fourth and fifth carbon atoms and a ketone group at the first carbon. The compound is further characterized by a 4-fluorobenzyl group attached to the second carbon, which introduces a fluorine atom to the benzene ring, and a pyrrolidin-1-yl group at the first carbon, which is a five-membered nitrogen-containing ring. This chemical structure may be relevant in the context of pharmaceuticals or other chemical industries, potentially serving as an intermediate or a building block for more complex molecules.

2803-20-5

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2803-20-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 2803-20-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,8,0 and 3 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 2803-20:
(6*2)+(5*8)+(4*0)+(3*3)+(2*2)+(1*0)=65
65 % 10 = 5
So 2803-20-5 is a valid CAS Registry Number.

2803-20-5Downstream Products

2803-20-5Relevant academic research and scientific papers

Formation of o-Allyl- And Allenyl-Modified Amides via Intermolecular Claisen Rearrangement

Niu, Zhi-Jie,Li, Lian-Hua,Li, Xue-Song,Liu, Hong-Chao,Shi, Wei-Yu,Liang, Yong-Min

, p. 1315 - 1320 (2021)

We developed a new transition-metal-free intermolecular Claisen rearrangement process to introduce allyl and allenyl groups into the α position of tertiary amides. In this transformation, amides were activated by trifluoromethanesulfonic anhydride to produce the keteniminium ion intermediates that exhibit strong electrophilic activity. This atom-economical process delivers α position-modified amides under mild conditions in moderate to good yields and showcases a broad substrate compatibility.

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