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4-(3,4-dimethoxyphenyl)tetrahydropyran-2-one is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

440089-98-5

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440089-98-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 440089-98-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,4,0,0,8 and 9 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 440089-98:
(8*4)+(7*4)+(6*0)+(5*0)+(4*8)+(3*9)+(2*9)+(1*8)=145
145 % 10 = 5
So 440089-98-5 is a valid CAS Registry Number.

440089-98-5Relevant academic research and scientific papers

A synthesis of 6-tributylstannyl-3,4-dihydro-2H-pyrans via coupling of enol triflates with (Bu3Sn)(Bu)Culi·liCN

Wildman, Tanya,Kocienski, Philip J.,Narquizian, Robert,Whittingham, William G.

, p. 393 - 398 (2007/10/03)

Enol triflates derived from 6- and 7-membered ring lactones (6 cases) react with (Bu3Sn)(Bu)CuLi·LiCN in THF at -78 °C to give the corresponding α-tributylstannyl cyclic enol ethers in 54-85% yield.

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