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111220-31-6

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111220-31-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 111220-31-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,1,2,2 and 0 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 111220-31:
(8*1)+(7*1)+(6*1)+(5*2)+(4*2)+(3*0)+(2*3)+(1*1)=46
46 % 10 = 6
So 111220-31-6 is a valid CAS Registry Number.

111220-31-6Relevant articles and documents

Synthesis of Substitued Dibenzophospholes. Part 6. Preparation of Symmetrical and Non-symmetrical Quaterphenyl Intermediates

Cornforth, Sir John,Kumar, Ashok,Stuart, Alan S.

, p. 859 - 866 (2007/10/02)

Further examples are given of the synthetic approach to 4,6-diaryldibenzophospholes by arylation of 1,3-dinitrobenzene and coupling of the resulting biphenyls to symmetrically substituted quaterphenyls.Satisfactory procedures are described for the monoarylation of 2,2',4,4'-tetranitrobiphenyl and for arylation of the products to provide non-symmetrically substituted tetranitroquaterphenyls.Some procedures for the regioselective alkoxydenitration of tetranitroquaterphenyls are described.

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