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331270-20-3

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331270-20-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 331270-20-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,1,2,7 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 331270-20:
(8*3)+(7*3)+(6*1)+(5*2)+(4*7)+(3*0)+(2*2)+(1*0)=93
93 % 10 = 3
So 331270-20-3 is a valid CAS Registry Number.

331270-20-3Downstream Products

331270-20-3Relevant articles and documents

Novel applications of hypervalent iodine: PIFA mediated synthesis of benzo[c]phenanthiridines and benzo[c]phenanthridinones

Moreno,Tellitu,Etayo,SanMartín,Domínguez

, p. 5403 - 5411 (2007/10/03)

A short and efficient access to benzo[c]phenanthridines and phenanthridinones is achieved by the action of phenyliodine(III)-bis(trifluoroacetate) (PIFA) on properly substituted benzylnaphthylamines and naphthylbenzamides, respectively. This reagent promotes a non-phenolic oxidative biaryl coupling process, the key step of the synthesis. A study of the electronic and steric requirements of the substrates is carried out since, in some cases, dimerization processes prevail over intramolecular cyclization. A mechanistic proposal is also included.

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