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4040-08-8

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4040-08-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4040-08-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,0,4 and 0 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 4040-08:
(6*4)+(5*0)+(4*4)+(3*0)+(2*0)+(1*8)=48
48 % 10 = 8
So 4040-08-8 is a valid CAS Registry Number.

4040-08-8Downstream Products

4040-08-8Relevant articles and documents

The scope and mechanism of phosphonium-mediated SNAr reactions in heterocyclic amides and ureas

Wan, Zhao-Kui,Wacharasindhu, Sumrit,Levins, Christopher G.,Lin, Melissa,Tabei, Keiko,Mansour, Tarek S.

, p. 10194 - 10210 (2008/04/12)

(Chemical Equation Presented) An efficient "one-step" synthesis of cyclic amidines and guanidines has been developed. Treatment of cyclic amides and ureas with benzotriazol-l-yloxytris(dimethylamino)phosphonium hexafluorophosphate (BOP), base, and nitrogen nucleophiles leads to the formation of the corresponding cyclic amidines and guanidines, typically in good to excellent yields. This method has also been used to prepare heteroaryl ethers and thioethers using phenol and thiophenol nucleophiles. Time course NMR and HPLC-MS studies have facilitated explicit characterization of the proposed intermediates (the phosphonium salt and HOBt adduct); the data reveal a stepwise reaction pathway.

Potential antiviral agents: N-acyl derivatives of the s-triazine

Sciortino

, p. 747 - 752 (2007/10/04)

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