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134733-21-4

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134733-21-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 134733-21-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,7,3 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 134733-21:
(8*1)+(7*3)+(6*4)+(5*7)+(4*3)+(3*3)+(2*2)+(1*1)=114
114 % 10 = 4
So 134733-21-4 is a valid CAS Registry Number.

134733-21-4Downstream Products

134733-21-4Relevant articles and documents

Aryl Azide-Allene Cycloaddition. The Contrasting Behavior of Two Simple Allenes, 1,2-Cyclononadiene and 1,2-Propadiene

Wedegaertner, Donald K.,Kattak, Rangin K.,Harrison, Isom,Cristie, Sharon K.

, p. 4463 - 4467 (1991)

1,2-Cyclononadiene (1) reacts with phenyl azide (2a) and 4-bromophenyl azide (2b) to give conjugated triazoline adducts 3a and 3b, respectively. (R)-(+)-1 and 2a react to give (S)-(+)-3a, which is consistent with a concerted cycloaddition mechanism.The reaction of 1,2-propadiene (6) and 2a gives triazoles 8 and 10 plus compound 18 in nearly equal amounts.The formation of these products is rationalized by a scheme involving initial formation of triazolines 7 and 9.Triazoline 3a is slowly isomerized by sodium ethoxide or N,N-dimethylaniline to triazole 20.

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