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13033-50-6

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13033-50-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 13033-50-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,0,3 and 3 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 13033-50:
(7*1)+(6*3)+(5*0)+(4*3)+(3*3)+(2*5)+(1*0)=56
56 % 10 = 6
So 13033-50-6 is a valid CAS Registry Number.

13033-50-6Relevant articles and documents

Bismuth-catalyzed synthesis of polycyclic aromatic hydrocarbons (PAHs) with a phenanthrene backbone via cyclization and aromatization of 2-(2-arylphenyl)vinyl ethers

Murai, Masahito,Hosokawa, Naoki,Roy, David,Takai, Kazuhiko

, p. 4134 - 4137 (2014)

The reaction of 2-(2-arylphenyl)vinyl ethers in the presence of a catalytic amount of bismuth(III) triflate gave substituted phenanthrenes in excellent yields under mild reaction conditions. The reaction was also applied to the construction of other polycyclic aromatic hydrocarbons (PAHs), such as chrysene, helicene, and pyrene having a phenanthrene backbone, via regioselective cyclization. This method has the advantages of easy availability of the cyclization precursors, operational simplicity, and high reaction efficiency.

Catalytic Asymmetric Synthesis of N-Chiral Amine Oxides

Bhadra, Sukalyan,Yamamoto, Hisashi

supporting information, p. 13043 - 13046 (2016/10/30)

Direct asymmetric synthesis of N-chiral amine oxides was accomplished (up to 91:9 e.r.) by means of a bimetallic titanium catalyst. A hydroxy group situated at the γ-position of the N stereocenter enables the desired N-oxidation through dynamic kinetic resolution of the trivalent amine substrates. The method was further extended to the kinetic resolution of racemic γ-amino alcohols with a preexisting stereocenter, giving an important class of enantioenriched (up to 99.9:0.1 e.r.) building blocks that are otherwise difficult to synthesize.

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