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221158-41-4

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221158-41-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221158-41-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,1,5 and 8 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 221158-41:
(8*2)+(7*2)+(6*1)+(5*1)+(4*5)+(3*8)+(2*4)+(1*1)=94
94 % 10 = 4
So 221158-41-4 is a valid CAS Registry Number.

221158-41-4Relevant articles and documents

Ni-Catalyzed β-Alkylation of Cyclopropanol-Derived Homoenolates

Mills, L. Reginald,Zhou, Cuihan,Fung, Emily,Rousseaux, Sophie A. L.

supporting information, p. 8805 - 8809 (2019/11/03)

Metal homoenolates are valuable synthetic intermediates which provide access to β-functionalized ketones. In this report, we disclose a Ni-catalyzed β-alkylation reaction of cyclopropanol-derived homoenolates using redox-active N-hydroxyphthalimide (NHPI) esters as the alkylating reagents. The reaction is compatible with 1°, 2°, and 3° NHPI esters. Mechanistic studies imply radical activation of the NHPI ester and 2e β-carbon elimination occurring on the cyclopropanol.

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