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147723-40-8

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147723-40-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 147723-40-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,7,7,2 and 3 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 147723-40:
(8*1)+(7*4)+(6*7)+(5*7)+(4*2)+(3*3)+(2*4)+(1*0)=138
138 % 10 = 8
So 147723-40-8 is a valid CAS Registry Number.

147723-40-8Downstream Products

147723-40-8Relevant articles and documents

Polyfuryl(Aryl)Alkanes And Their Derivatives. 7. New Recyclization And Cyclization Reactions In The 2-Hydroxyaryldifurylmethane Series

Butin, A. V.,Krapivin, G. D.,Zavodnik, V. E.,Kul'nevich, V. G.

, p. 524 - 533 (2007/10/02)

Reaction of 2-hydroxybenzaldehydes with α-methylfuran (sylvan) under acid-catalysis conditions was investigated It is shown that the reaction does not stop at the step involving formation of 2-hydroxyarylfuryl-methanes but proceeeds further with opening of one of the furan rings and recyclization to 3-furylbenzo-furan derivatives.The latter in turn undergo transformations that lead to new heterocyclic systems - 5,6-dihydro-2,4-dimethyl-4-(5-methyl-2-furyl)-4H-benzofurocyclopentafurans.Data from the IR, PMR, and mass spectra, alternative synthesis, and x-ray diffraction analysis were used to confirm structures of the synthesized compounds.

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