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131178-73-9

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131178-73-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131178-73-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,1,7 and 8 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 131178-73:
(8*1)+(7*3)+(6*1)+(5*1)+(4*7)+(3*8)+(2*7)+(1*3)=109
109 % 10 = 9
So 131178-73-9 is a valid CAS Registry Number.

131178-73-9Downstream Products

131178-73-9Relevant articles and documents

Regiochemistry of the Coupling of Aryl Radicals with Nucleophiles Derived from the Naphthyl System. Experimental and Theoretical Studies

Pierini, Adriana B.,Baumgartner, Maria T.,Rossi, Roberto A.

, p. 580 - 586 (2007/10/02)

We here report the photostimulated reaction of unactived aromatic halides with ambident nucleophiles derived from the naphthyl system such as 1- and 2-naphthylamide, 2-naphthoxide, 2-naphthalenethiolate, and 2 naphthaleneselenate ions, by the SRN1 mechanism of nucleophilic substitution.According to our experimental results, C-arylation in position 1 of the naphthyl moiety is the only reaction observed with 2-naphthoxide ions and it is favored over N-arylation with 1- and 2-naphthylamide ions.Heteroatom arylation is preferred over C-arylation with 2-naphthalenethiolate ions while it is the only observed reaction with 2-naphthaleneselenate ions.A theoretical study was carried out to explain the regiochemistry of the system.In competition experiments, 2-naphthalenethiolate ions proved to be 1.8 +/- 0.2 times more reactive than 2-naphthoxide ions for C-substitution toward p-anisyl radicals in liquid ammonia.

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