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133471-20-2

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133471-20-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133471-20-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,4,7 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 133471-20:
(8*1)+(7*3)+(6*3)+(5*4)+(4*7)+(3*1)+(2*2)+(1*0)=102
102 % 10 = 2
So 133471-20-2 is a valid CAS Registry Number.

133471-20-2Relevant articles and documents

Enantiodivergent Formation of C-P Bonds: Synthesis of P-Chiral Phosphines and Methylphosphonate Oligonucleotides

Baran, Phil S.,Eastgate, Martin D.,Knouse, Kyle W.,Padial, Natalia M.,Rivas-Bascón, Nazaret,Schmidt, Michael A.,Vantourout, Julien C.,Xu, Dongmin,Zheng, Bin

, (2020/03/30)

Phosphorus Incorporation (PI, abbreviated Π) reagents for the modular, scalable, and stereospecific synthesis of chiral phosphines and methylphosphonate nucleotides are reported. Synthesized from trans-limonene oxide, this reagent class displays an unexpected reactivity profile and enables access to chemical space distinct from that of the Phosphorus-Sulfur Incorporation reagents previously disclosed. Here, the adaptable phosphorus(V) scaffold enables sequential addition of carbon nucleophiles to produce a variety of enantiopure C-P building blocks. Addition of three carbon nucleophiles to Π, followed by stereospecific reduction, affords useful P-chiral phosphines; introduction instead of a single methyl group reveals the first stereospecific synthesis of methylphosphonate oligonucleotide precursors. While both Π enantiomers are available, only one isomer is required - the order of nucleophile addition controls the absolute stereochemistry of the final product through a unique enantiodivergent design.

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