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31661-15-1

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31661-15-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 31661-15-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,6,6 and 1 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 31661-15:
(7*3)+(6*1)+(5*6)+(4*6)+(3*1)+(2*1)+(1*5)=91
91 % 10 = 1
So 31661-15-1 is a valid CAS Registry Number.

31661-15-1Relevant articles and documents

The synthetic versatility of alkoxycarbonyl- and hydroxymethyl-piperazine- 2,5-diones

Chai, Christina L.L.,Elix, John A.,Huleatt, Paul B.

, p. 8722 - 8739 (2007/10/03)

Alkoxycarbonylpiperazine-2,5-diones are versatile precursors for the α-functionalisation of piperazine-2,5-diones. The alkoxycarbonyl group activates the α-carbon position to alkylation reactions and this provides a mild and selective method for the extension of the carbon framework of piperazine-2,5-diones. In addition, the alkoxycarbonyl group can be converted to the carboxy group, which in turn can be 'deleted' or manipulated for the installation of carbon and/or heteroatom substituents where desired, the latter via N-acyliminium chemistry. We also demonstrate that hydroxymethylpiperazine-2, 5-diones complement carboxypiperazinediones as precursors for the generation of N-acyliminium ions.

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