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18351-42-3

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18351-42-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 18351-42-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,3,5 and 1 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 18351-42:
(7*1)+(6*8)+(5*3)+(4*5)+(3*1)+(2*4)+(1*2)=103
103 % 10 = 3
So 18351-42-3 is a valid CAS Registry Number.

18351-42-3Relevant articles and documents

Site-specific functionalisation of proteins by a Staudinger-type reaction using unsymmetrical phosphites

Boehrsch, Verena,Serwa, Remigiusz,Majkut, Paul,Krause, Eberhard,Hackenberger, Christian P. R.

scheme or table, p. 3176 - 3178 (2010/09/04)

Unsymmetrical phosphites react efficiently in a Staudinger reaction with p-azido-phenylalanine, which can be applied for the biotinylation of proteins, thereby expanding the scope of the chemoselective Staudinger-phosphite reaction of aryl azides with symmetrical phosphites to the corresponding phosphoramidates. The Royal Society of Chemistry 2010.

DIARYL ALKYLPHOSPHONATES AND METHODS FOR PREPARING SAME

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Page/Page column 25-26, (2010/11/28)

A method for preparing substantially pure optionally substituted diaryl alkylphosphonates from an optionally substituted triarylphosphite and an optionally substituted trialkylphosphite or an optionally substituted alkanol under special reaction conditions is described.

Phosphitylation via the Mitsunobu reaction

Grice, I. Darren,Harvey, Peta J.,Jenkins, Ian D.,Gallagher, Michael J.,Ranasinghe, Millagahamada G.

, p. 1087 - 1090 (2007/10/03)

Treatment of a dialkyl phosphite with triphenylphosphine and diisopropyl azodicarboxylate in toluene, followed by addition of an alcohol, results in the formation of the corresponding trialkyl phosphite. Similarly, dialkyl phosphonites can be synthesised from monoalkyl phosphites (alkyl phosphinates).

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