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197970-24-4

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197970-24-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 197970-24-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,7,9,7 and 0 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 197970-24:
(8*1)+(7*9)+(6*7)+(5*9)+(4*7)+(3*0)+(2*2)+(1*4)=194
194 % 10 = 4
So 197970-24-4 is a valid CAS Registry Number.

197970-24-4Downstream Products

197970-24-4Relevant articles and documents

Experimental and theoretical studies on the diastereoselective Diels-Alder reactions of chiral 1-alkoxy-1,3-butadienes. I: Parent system and 4-substituted derivatives

Virgili, Marina,Pericas, Miquel A.,Moyano, Albert,Riera, Antoni

, p. 13427 - 13448 (2007/10/03)

Chiral 1-alkoxy-1,3-dienes (parent and 4-substituted) have been prepared from the corresponding chiral alkoxyacetylenes in a stereoselective manner following a 2C + 2C approach. The Diels-Alder reactions of the dienes with maleic anhydride and 4-phenyl-3H-1,2,4-triazoline-3,5-dione take place with significant diastereoselectivity. Theoretical calculations on these cycloadditions, performed with the SCF-MO procedure AM1, have been used in the stereochemical assignment of the adducts.

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