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256347-42-9

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256347-42-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 256347-42-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,6,3,4 and 7 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 256347-42:
(8*2)+(7*5)+(6*6)+(5*3)+(4*4)+(3*7)+(2*4)+(1*2)=149
149 % 10 = 9
So 256347-42-9 is a valid CAS Registry Number.

256347-42-9Relevant articles and documents

Copper-Mediated Introduction of the CF2PO(OEt)2 Motif: Scope and Limitations

Ivanova, Maria V.,Bayle, Alexandre,Besset, Tatiana,Pannecoucke, Xavier,Poisson, Thomas

, p. 17318 - 17338 (2017/11/20)

Herein, a general procedure to access CF2PO(OEt)2-containing molecules is reported. The reagent CuCF2PO(OEt)2 is accessible by a simple protocol and a broad range of substrates can be functionalised. The procedure allows the conversion of aryl diazonium salts, as well as aryl, heteroaryl, vinyl and alkynyl iodonium salts, into the corresponding fluorinated molecules at room temperature. Mechanistic studies were performed to gain a better understanding of the reaction pathway. Under similar conditions, vinyl and aryl iodides, allyl halides, and benzyl bromides were also functionalised, and the scope and limitations of the reaction were studied. Finally, the procedure was extended to disulfides to offer new access to SCF2PO(OEt)2-containing molecules.

An efficient synthesis of a 4'-phosphonodifluoromethyl-3'-formyl-phenylalanine containing Src SH2 ligand

Shakespeare, William C.,Bohacek, Regine S.,Narula, Surinder S.,Azimioara, Mihai D.,Yuan, Ruth W.,Dalgarno, David C.,Madden, Laura,Botfield, Martyn C.,Holt, Dennis A.

, p. 3109 - 3112 (2007/10/03)

A CuBr-mediated, regioselective cross-coupling between methyl 2,5-diiodobenzoate (4) and [(diethoxyphosphinyl)difluoromethyl]zinc bromide is reported. Palladium-catalyzed incorporation of an amino acid side chain, followed by subsequent modifications resu

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