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244239-16-5

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244239-16-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 244239-16-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,4,4,2,3 and 9 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 244239-16:
(8*2)+(7*4)+(6*4)+(5*2)+(4*3)+(3*9)+(2*1)+(1*6)=125
125 % 10 = 5
So 244239-16-5 is a valid CAS Registry Number.

244239-16-5Downstream Products

244239-16-5Relevant articles and documents

Reaction of N-vinylic phosphazenes derived from β-amino acids with aldehydes. Azadiene-mediated synthesis of dihydropyridines, pyridines, and polycyclic nitrogen derivatives

Palacios, Francisco,Herran, Esther,Rubiales, Gloria

, p. 6239 - 6246 (2007/10/03)

Enamino phosphonium salts 2 are obtained by 1,2-addition of hydrogen chloride to N-vinylic phosphazenes 1 derived from triphenylphosphine. Aza- Wittig reaction of phosphazenes 1 derived from triphenylphosphine and 6 derived from diphenylmethylphosphine with aldehydes 3 leads to the formation of 2-azadienes 7. Reaction of azadienes 7 with enamines affords dihydropyridines 9 and 11, pyridines 12, and bicyclic nitrogen heterocycles 15-18 in a regioselective fashion, while heterodiene 20 reacts in the same way with pyrrolidinocyclohexanone giving 1-azaphenanthrene compound 21. Reaction of enamino phosphonium salts 2 with aldehydes 3 gives symmetrical dihydropyridines 5.

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