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5502-11-4

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5502-11-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 5502-11-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,5,0 and 2 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 5502-11:
(6*5)+(5*5)+(4*0)+(3*2)+(2*1)+(1*1)=64
64 % 10 = 4
So 5502-11-4 is a valid CAS Registry Number.

5502-11-4Relevant articles and documents

An Approach to the Synthesis of Stenine

Zhu, Liang,Lauchli, Ryan,Loo, Mandy,Shea, Kenneth J.

, p. 2269 - 2271 (2008/02/05)

A type 2 N-acylnitroso intramolecular Diels-Alder reaction followed by reductive N - O bond cleavage formed the B and C rings of the Stemona alkaloid stenine. Further elaboration provided the functionalized tricyclic core.

Thiol esters in organic synthesis. X. A new approach to 1,5-ketols and 5-hydroxy esters using S,S'-diethyl dithiomalonate as an ethanol carbanion equivalent

Liu, Hsing-Jang,Oppong, Isaac V.

, p. 94 - 96 (2007/10/02)

Michael addition of S,S'-diethyl dithiomalonate to conjugated enones and α,β-unsaturated esters followed by reduction with Raney-nickel gave rise to 1,5-ketols and 5-hydroxy esters respectively in good yields.

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