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1421789-91-4

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1421789-91-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1421789-91-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,2,1,7,8 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1421789-91:
(9*1)+(8*4)+(7*2)+(6*1)+(5*7)+(4*8)+(3*9)+(2*9)+(1*1)=174
174 % 10 = 4
So 1421789-91-4 is a valid CAS Registry Number.

1421789-91-4Relevant articles and documents

Lewis acid catalyzed intramolecular condensation of ynol ether-acetals. synthesis of alkoxycycloalkene carboxylates

Tran, Vincent,Minehan, Thomas G.

, p. 6100 - 6103 (2012)

Treatment of ynol ether-tethered dialkyl acetals with catalytic quantities of scandium triflate in CH3CN gives rise to five-, six-, and seven-membered alkoxycycloalkene carboxylates in good to excellent yields. Tri- and tetrasubstituted carbocyclic and heterocyclic alkenes may be formed by this method, and the products obtained may serve as useful intermediates for natural product synthesis.

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