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1391950-71-2

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1391950-71-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1391950-71-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,9,1,9,5 and 0 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1391950-71:
(9*1)+(8*3)+(7*9)+(6*1)+(5*9)+(4*5)+(3*0)+(2*7)+(1*1)=182
182 % 10 = 2
So 1391950-71-2 is a valid CAS Registry Number.

1391950-71-2Downstream Products

1391950-71-2Relevant articles and documents

Synthesis and characterization of some new c2 symmetric chiral bisamide ligands derived from chiral feist's acid

Al Majid, Abdullah M.A.,Islam, Mohammad Shahidul,Al-Othman, Zeid Abdullah,Al-Salhoob, Ahlam F.,Barakat, Assem

, p. 5550 - 5563 (2012/08/28)

The hemilabile chiral C2 symmetrical bidentate substituted amide ligands (1R,2R)-5a-d and (1S,2S)-6a-d were synthesized in quantitative yield from (1R,2R)-(+)-3- methylenecyclo-propane-1,2-dicarboxylic acid (1R,2R)-3 and (1S,2S)-(-)-3-methylenecyclopropane- 1,2-dicarboxylic acid (1S,2S)-3, in two steps, respectively. The chiral Feist's acids (1R,2R)-3 and (1S,2S)-3 were obtained in good isomeric purity by resolution of trans-(±)-3-methylene-cyclopropane-1,2-dicarboxylic acid from an 8:2 mixture of tert-butanol and water, using (R)-(+)-α-methylbenzyl amine as a chiral reagent. This process is reproducible on a large scale. All these new synthesized chiral ligands were characterized by 1H-NMR, 13C-NMR, IR, and mass spectrometry, as well as elemental analysis and their specific rotations were measured. These new classes of C2 symmetric chiral bisamide ligands could be of special interest in asymmetric transformations.

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