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635678-43-2

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635678-43-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 635678-43-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,5,6,7 and 8 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 635678-43:
(8*6)+(7*3)+(6*5)+(5*6)+(4*7)+(3*8)+(2*4)+(1*3)=192
192 % 10 = 2
So 635678-43-2 is a valid CAS Registry Number.

635678-43-2Relevant articles and documents

Investigation of Lewis Acid-Catalyzed Asymmetric Aza-Diels-Alder Reactions of 2H-Azirines

Timen, Asa Sjoeholm,Somfai, Peter

, p. 9958 - 9963 (2007/10/03)

Asymmetric Diels-Alder reactions with 2H-azirines as dienophiles have been studied. Diastereoselective reactions with an enantiopure azirine 1b, bearing a chiral auxiliary, gave substituted bi- and tricyclic tetrahydropyridines in high yield and stereoselectivity, under the influence of a Lewis acid. The novel enantioselective [4+2] cycloaddition reaction of 3-benzyl-2H-azirine carboxylate with cyclopentadiene was investigated with various chiral Lewis acid complexes and provided the corresponding tetrahydropyridines in moderate to low yield and enantioselectivity.

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