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133785-55-4

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133785-55-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133785-55-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,7,8 and 5 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 133785-55:
(8*1)+(7*3)+(6*3)+(5*7)+(4*8)+(3*5)+(2*5)+(1*5)=144
144 % 10 = 4
So 133785-55-4 is a valid CAS Registry Number.

133785-55-4Relevant articles and documents

Cyclization of deprotonated 2-phenyl-1-tosylaziridine. A surprising example of an intramolecular nucleophilic aromatic addition

Breternitz,Schaumann,Adiwidjaja

, p. 1299 - 1302 (2007/10/02)

Deprotonation of 2-phenyl-1-tosylaziridine 1 with butyl lithium gives an anion that cyclizes to 4 by an intramolecular nucleophilic aromatic addition. Treatment of derivatives 5, 6 with a Gringnard reagent produces aziridines 10, 11.

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