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15941-64-7

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15941-64-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 15941-64-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,5,9,4 and 1 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 15941-64:
(7*1)+(6*5)+(5*9)+(4*4)+(3*1)+(2*6)+(1*4)=117
117 % 10 = 7
So 15941-64-7 is a valid CAS Registry Number.

15941-64-7Downstream Products

15941-64-7Relevant articles and documents

The synthesis of novel crown ethers, part X*, 4-propyl-and 3-ethyl-4-methylchromenone-crown ethers

Tiftikci, Esra,Erk, Cakil

, p. 867 - 871 (2004)

Starting from ethyl propionylacetate, and ethyl 2-ethylacetoacetate we prepared 4-propyl-7,8-, 4-propyl-6,7-, 3-ethyl-4-methyl-7,8- and 3-ethyl-4-methyl-6,7-dihydroxy-2H-chromenones which were allowed to react with the bis-dihalides or ditosylates of glycols in DMF/Na2CO3 to afford the 6,7- and 7,8-chromenone derivatives of 12-crown-4, 15-crown-4 and 18-crown-6. The products were identified using ir, 13C and 1H nmr, ms and high resolution mass spectroscopy. The cation selectivities of chromenone crown ethers with Li+, Na+ and K+ cations were estimated from the steady state emission fluorescence spectra of free and cation complexed chromenone macrocyclic ethers in acetonitrile.

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