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328533-94-4

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328533-94-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 328533-94-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,2,8,5,3 and 3 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 328533-94:
(8*3)+(7*2)+(6*8)+(5*5)+(4*3)+(3*3)+(2*9)+(1*4)=154
154 % 10 = 4
So 328533-94-4 is a valid CAS Registry Number.

328533-94-4Upstream product

328533-94-4Downstream Products

328533-94-4Relevant articles and documents

Tf2O-Promoted Intramolecular Schmidt Reaction of the ω-Azido Carboxylic Acids

Wang, Xue-Juan,Su, Yan,Li, Rui,Gu, Peiming

, p. 5816 - 5824 (2018/05/14)

A designed Tf2O-promoted intramolecular Schmidt reaction of 2-substituted ω-azido carboxylic acids was demonstrated. Tf2O was used as an activation reagent for the carboxylic acid, and ω-azido anhydride was in situ generated, releasing a molecular TfOH, which acted as an acid promoter for the Schmidt process. A series of 2-substituted pyrrolidines was produced and acetylated for better purification. The strategy was also efficient for conversion of a 4-substituted ω-azido carboxylic acid to the tricyclic lactam.

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