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142231-02-5

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142231-02-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 142231-02-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,2,3 and 1 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 142231-02:
(8*1)+(7*4)+(6*2)+(5*2)+(4*3)+(3*1)+(2*0)+(1*2)=75
75 % 10 = 5
So 142231-02-5 is a valid CAS Registry Number.

142231-02-5Downstream Products

142231-02-5Relevant articles and documents

Enantiomers and Barriers to Racemization of Sterically Hindered N-Aryl- and N-Heteroarylpyrroles

Vorkapic-Furac, Jasna,Mintas, Mladen,Kastner, Fritz,Mannschreck, Albrecht

, p. 327 - 333 (2007/10/02)

The N-aryl- and N-heteroaryl-2,5-dimethylpyrrole-3-carbaldehydes 2-8 have been synthesized by condensation of hexane-2,5-dione with the appropriate amine and subsequent Vilsmeier-Haack formylation of the pyrrole ring.Diastereomeric association complexes of the racemic pyrrole 8 were studied by pmr chemical shifts and the aplittings induced by (+)-1-(9-anthryl)-2,2,2-trifluoroethanol.Enrichment of the enantiomers M and P of 2 and 6 was achieved by liquid chromatography on triacetylcellulose.The barrier to partial rotation about the C-N bond in 6 was determined by thermal racemization and its lower limits in 2 and 8 were estimated.

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