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221887-91-8

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221887-91-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221887-91-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,8,8 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 221887-91:
(8*2)+(7*2)+(6*1)+(5*8)+(4*8)+(3*7)+(2*9)+(1*1)=148
148 % 10 = 8
So 221887-91-8 is a valid CAS Registry Number.

221887-91-8Relevant articles and documents

Catalytic enantioselective alkylation of substituted dioxanone enol ethers: ready access to C(α)-tetrasubstituted hydroxyketones, acids,and esters

Seto, Masaki,Roizen, Jennifer L.,Stoltz, Brian M.

, p. 6873 - 6876 (2008)

(Chemical Equation Presented) Adaptive Alkylation: Palladium-catalyzed asymmetric alkylation enables access to fully substituted enantioenriched oxygenated stereocenters, which can be transformed easily to α-hydroxyketones, esters, and acids, providing a catalytic, enantioselective synthesis for natural products.

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