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211931-26-9

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211931-26-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 211931-26-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,1,9,3 and 1 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 211931-26:
(8*2)+(7*1)+(6*1)+(5*9)+(4*3)+(3*1)+(2*2)+(1*6)=99
99 % 10 = 9
So 211931-26-9 is a valid CAS Registry Number.

211931-26-9Downstream Products

211931-26-9Relevant articles and documents

Remote asymmetric induction in lewis acid-catalyzed Diels-Alder reaction of α,β-unsaturated enones having a chiral sulfinyl-substituted, 5-membered aromatic heterocycle

Arai, Yoshitsugu,Masuda, Tsutomu,Masaki, Yukio

, p. 1078 - 1083 (2007/10/03)

Two types of chiral sulfoxides as Diels-Alder dienophiles were synthesized and high levels of diastereoselectivity were observed in cycloadditions. 2-Furyl and 2-thienyl α,β-enones, bearing a chiral sulfinyl group in the heterocycle, served as efficient dienophiles in Diels-Alder reactions, where the catalytic use of aluminium chloride or a lanthanide triflate effected the cycloaddition with cyclopentadiene affording the endo adduct with high diastereoselectivity, ranging from 91% to 98%.

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