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104669-28-5

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104669-28-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 104669-28-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,4,6,6 and 9 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 104669-28:
(8*1)+(7*0)+(6*4)+(5*6)+(4*6)+(3*9)+(2*2)+(1*8)=125
125 % 10 = 5
So 104669-28-5 is a valid CAS Registry Number.

104669-28-5Relevant articles and documents

Synthesis of 1,2-dihydropyridines using vinyloxiranes as masked dienolates in imino-aldol reactions

Brunner, Bernhard,Stogaitis, Nicole,Lautens, Mark

, p. 3473 - 3476 (2007/10/03)

The application of vinyloxiranes, substituted with an electron-withdrawing group, as masked dienolates in vinylogous imino-aldol reactions was achieved. Under the reaction conditions highly substituted 1,2-dihydropyridines were obtained in moderate to good yields. Mechanistic studies indicate that the reaction proceeds via the formation of an (E)-amino-α,β-unsaturated aldehyde, followed by isomerization to the (Z)-isomer, cyclization, and elimination of a water molecule, leading to the formation of the 1,2-dihydropyridine.

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