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13556-70-2

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13556-70-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 13556-70-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,5,5 and 6 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 13556-70:
(7*1)+(6*3)+(5*5)+(4*5)+(3*6)+(2*7)+(1*0)=102
102 % 10 = 2
So 13556-70-2 is a valid CAS Registry Number.

13556-70-2Relevant articles and documents

RUTHENIUM-CATALYSED REARRENGEMENTS OF AZOBENZENES III. PREPARATION OF N-PHENYL-1,2-PHENYLENEDIAMINE AND N1-PHENYL-N2-(sec-ALKYL)-1,2-PHENYLENEDIAMINE AND DERIVATIVES THEREOF BY THE RUTHENIUM-CATALYSED REACTION OF AZOBENZENES WITH SECONDARY ALCOHOLS

Spencer, Alwyn

, p. 91 - 98 (2007/10/02)

RuCl3*3H2O in presence of PPh3 and a mild base and under an atmosphere of carbon monoxide catalyses the reaction of azobenzene and 2-propanol to give N-phenyl-1,2-phenylenediamine and N1-phenyl-N2-(2-propyl)-1,2-phenylenediamine.The selectivity towards the two products can be controlled by varying the amount of base (NaOAc or LiOAc) and 2-propanol used.Secondary alcohols which are less effective for N-alkylation than 2-propanol favour the former product.Substituents in the azobenzene derivative have a marked effect on the yield.Where the azobenzene derivative used permits isomer formation within the N-phenylphenylenediamine unit, all possible isomers usually occur.

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