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1643966-26-0

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1643966-26-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1643966-26-0 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,4,3,9,6 and 6 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1643966-26:
(9*1)+(8*6)+(7*4)+(6*3)+(5*9)+(4*6)+(3*6)+(2*2)+(1*6)=200
200 % 10 = 0
So 1643966-26-0 is a valid CAS Registry Number.

1643966-26-0Downstream Products

1643966-26-0Relevant articles and documents

Synthesis of C2-symmetric bisphosphine ligands from tartaric acid, and their performance in the Pd-Catalyzed asymmetric o-allylation of a phenol

Dindaroglu, Mehmet,Akyol Dincer, Sema,Schmalz, Hans-Guenther

, p. 4315 - 4326 (2014/07/21)

Starting from tartaric acid derived chiral diols or dicarboxylic acid dichlorides with either a 2,2-dimethyl-1,3-dioxolane (Taddol) or a 2,3-dimethoxy-2,3-dimethyl-1,4-dioxane (Tatrol) core structure, and BH 3-protected ortho-phosphanyl phenols, a set of fourteen new C 2-symmetric diphosphine ligands was synthesized. In addition, three related ligands were obtained from ortho-diphenylphosphino-anilines. The fully characterized ligands were then tested in the Pd-catalyzed enantioselective O-allylation of 4-methoxyphenol using crotyl methyl carbonate as a reagent. In addition, a pseudo-intramolecular variant of the reaction, using crotyl 4-methoxyphenyl carbonate as a substrate, was studied. The so-called Trost ligand was used as a reference. Although the Trost ligand (3 mol-%) gave up to 84% ee, one of the new ligands showed higher activity (50% ee with 0.075 mol-%). Copyright

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