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73640-02-5

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73640-02-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 73640-02-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,6,4 and 0 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 73640-02:
(7*7)+(6*3)+(5*6)+(4*4)+(3*0)+(2*0)+(1*2)=115
115 % 10 = 5
So 73640-02-5 is a valid CAS Registry Number.

73640-02-5Relevant articles and documents

Tropylium-Catalyzed O-H Insertion Reactions of Diazoalkanes with Carboxylic Acids

Empel, Claire,Nguyen, Thanh Vinh,Koenigs, Rene M.

, p. 548 - 553 (2021/01/26)

Herein, we describe the application of a nonbenzenoid aromatic carbocation, namely tropylium, as an organic Lewis acid catalyst in O-H functionalization reactions of diazoalkanes with benzoic acids. The newly developed protocol is applicable to a wide range of diazoalkane and carboxylic acid substrates with excellent efficiency (43 examples, up to 99% yield).

One-Pot Reaction of Carboxylic Acids, Ynol Ethers, and m-CPBA for Synthesis of α-Carbonyloxy Esters

Zeng, Linwei,Sajiki, Hironao,Cui, Sunliang

, p. 6423 - 6426 (2019/08/21)

A novel one-pot reaction of carboxylic acids, ynol ethers, and m-CPBA for the synthesis of α-carbonyloxy esters in the presence of Ag2O is described. This process provides a direct approach to α-carbonyloxy esters with the achievement of format

Phosphorus(III)-mediated reductive condensation of α- Keto esters and protic pronucleophiles

Zhao, Wei,Radosevich, Alexander T.

, p. 267 - 276 (2016/07/20)

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