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13143-05-0

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13143-05-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 13143-05-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,1,4 and 3 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 13143-05:
(7*1)+(6*3)+(5*1)+(4*4)+(3*3)+(2*0)+(1*5)=60
60 % 10 = 0
So 13143-05-0 is a valid CAS Registry Number.

13143-05-0Downstream Products

13143-05-0Relevant articles and documents

Friedel-Crafts Acylation with 2-Isocyanatobenzoyl Chlorides: The Structure of the Intermediate Complex

Acharya, Baman Prasad,Rao, Y. Ramachandra

, p. 1001 - 1035 (2007/10/02)

The intermediate complex obtained in the Friedel-Crafts acylation of benzene with 2-isocyanatobenzoyl chloride (1a) reacts with methanol or ethanol in the presence of ether affording 4-alkoxy-4-phenyl-1,4-dihydro-3,1-benzoxazin-2(1H)-ones, whereas with anilines, the corresponding anils of 2-aminobenzophenone are obtained.In the presence of triethylamine, the complex reacts with aniline and 2-aminobenzophenone affording 4-hydroxy-4-phenyl-3-substituted 3,4-dihydroquinazolin-2(1H)-ones whereas, with alkyl anthranilates, the new 11b-phenyl-7,11b-dihydroquinazolinobenzoxazine-6,13-diones are obtained.Similar products are also obtained from 5-chloro-2-isocyanatobenzoyl chloride.The intermediate complex has been shown to exist exclusively in the cyclic form in both acidic and basic media.

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