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4,5-dihydro-2-methylfuran is an organic compound with the molecular formula C5H8O. It is a cyclic structure derived from furan, which is a heterocyclic compound containing a five-membered ring with four carbon atoms and one oxygen atom. The "2-methyl" part of the name indicates that there is a methyl group (CH3) attached to the second carbon atom of the furan ring. 4,5-dihydro-2-methylfuran is a colorless liquid with a distinctive odor and is used as a solvent, a chemical intermediate in the synthesis of various pharmaceuticals and agrochemicals, and as a flavoring agent in the food industry. It is also known for its potential applications in the development of biofuels and as a component in the production of polymers.

1708-25-4

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1708-25-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1708-25-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,7,0 and 8 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1708-25:
(6*1)+(5*7)+(4*0)+(3*8)+(2*2)+(1*5)=74
74 % 10 = 4
So 1708-25-4 is a valid CAS Registry Number.

1708-25-4Relevant academic research and scientific papers

Concise synthesis of cis- and trans-theaspirones via oxonium ion-initiated pinacol ring expansion

Paquette, Leo A.,Lanter, James C.,Wang, Hui-Ling

, p. 1119 - 1121 (1996)

The odoriferous principle of black tea has been produced from 2,2-dimethylcyclopentanone. The reaction sequence begins with 1,2-addition of 5-lithio-2-methyl-2,3-dihydrofuran to this ketone and immediate acid-catalyzed ring expansion of the resulting carbinols to a separable pair of spiro ethers. Individual conversion of these diastereomers to α,β-unsaturated ketones is followed by tandem condensation with the methyllithium-lithium bromide complex and oxidation with pyridinium chlorochromate.

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