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16801-56-2

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16801-56-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 16801-56-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,8,0 and 1 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 16801-56:
(7*1)+(6*6)+(5*8)+(4*0)+(3*1)+(2*5)+(1*6)=102
102 % 10 = 2
So 16801-56-2 is a valid CAS Registry Number.

16801-56-2Downstream Products

16801-56-2Relevant articles and documents

Enaminones in organic synthesis: A novel synthesis of 1,3,5-trisubstituted benzene derivatives and of 2-substituted-5-aroylpyridines

Abdel-Khalik, Mervat Mohammed,Elnagdi, Mohamed Hilmy

, p. 159 - 164 (2002)

Enaminones undergo self-condensation on reflux in acidic media yielding 1,3,5-trisubstituted benzene in very high yields. Reaction of enaminones 1a,b with ethyl propiolate affords 5-aroyl-1,3-benzene dicarboxylate derivatives.

Studies with Enaminones: The reaction of enaminones with Aminoheterocycles. A route to Azolopyrimidines, Azolopyridines and Quinolines

Almazroa, Sarah,Elnagdi, Mohamed H.,Salah El-Din, Abdellatif M.

, p. 267 - 272 (2007/10/03)

The enaminones 1b,d,f react with 4-phenyl-3-methyl-5-pyrazoleamine 3a to yield the pyrazole derivatives 4a-c that cyclised readily on reflux in pyridine solution in presence of hydrochloric acid to yield the pyrazolo[1,5-a]pyrimidines 5a-c. Similarly 3(5)

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