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31776-84-8

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31776-84-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 31776-84-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,7,7 and 6 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 31776-84:
(7*3)+(6*1)+(5*7)+(4*7)+(3*6)+(2*8)+(1*4)=128
128 % 10 = 8
So 31776-84-8 is a valid CAS Registry Number.

31776-84-8Relevant articles and documents

SYNTHESES OF 2-AZAFLUORENONES FROM 3-SUBSTITUTED 4-ARYLPYRIDINES

Shiao, Min-Jen,Liu, Kang-Hsiuan,Lin, Pen-Yuan

, p. 507 - 518 (2007/10/02)

3-substituted 4-arylpyridines (5a-i) were synthesized in good yields by reaction of mixed copper, zinc aryl organometallics (2a-e) with 1-ethoxycarbonylpyridinium chlorides (1a-d) followed by o-chloranil oxidation under reflux in toluene.The arylpyridines (5a-i) are obtained predominantly.Having compounds (5a-i) in hand, a convenient method was developed for the synthesis of 2-azafluorenones (7a-f) by using cyclization of 4-arylpyridines (5a-i) with phosphoric acid.

Aza analogs of 5-(p-fluorophenyl)salicylic acid.

Walford,Jones,Shen

, p. 339 - 344 (2007/10/06)

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