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212195-36-3

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212195-36-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 212195-36-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,2,1,9 and 5 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 212195-36:
(8*2)+(7*1)+(6*2)+(5*1)+(4*9)+(3*5)+(2*3)+(1*6)=103
103 % 10 = 3
So 212195-36-3 is a valid CAS Registry Number.

212195-36-3Relevant articles and documents

Asymmetric synthesis of α-substituted N-methylsulfonamides

Enders, Dieter,Thomas, Christian R.,Vignola, Nicola,Raabe, Gerhard

, p. 3657 - 3677 (2007/10/03)

A novel amine auxiliary for the asymmetric synthesis of α-substituted N-methylsulfonamides is described. The reaction of 4-([1,1′-biphenyl]-4-yl)-2,2-dimethyl-1,3-dioxan-5-amine (16) with various aliphatic sulfonyl chlorides afforded the corresponding sulfonamides, which were lithiated and subsequently reacted with electrophiles to give the corresponding products in high yields and good-to-excellent asymmetric inductions (de 83-95%). Racemization-free cleavage of the auxiliary led to the α-alkylated N-methylsulfonamides in acceptable yields and high enantiomer purities (ee 91 to ≥ 98).

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