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167955-25-1

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167955-25-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 167955-25-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,7,9,5 and 5 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 167955-25:
(8*1)+(7*6)+(6*7)+(5*9)+(4*5)+(3*5)+(2*2)+(1*5)=181
181 % 10 = 1
So 167955-25-1 is a valid CAS Registry Number.

167955-25-1Downstream Products

167955-25-1Relevant articles and documents

(1H-Benzotriazol-1-yloxy)tris(dimethylamino)phosphonium Hexafluorophosphate- and (1H-Benzotriazol-1-yloxy)tripyrrolidinophosphonium Hexafluorophosphate-Mediated Activation of Monophosphonate Esters: Synthesis of Mixed Phosphonate Diesters, the Reactivity of the Benzotriazolyl Phosphon...

Campagne, Jean-Marc,Coste, Jacques,Jouin, Patrick

, p. 5214 - 5223 (2007/10/02)

A general method for synthesizing mixed phosphonate diesters from monoesters using (1H-benzotriazol-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate or (1H-benzotriazol-1-yloxy)tripyrrolidinophosphonium hexafluorophosphate reagents is described.The reaction proceeded through a benzotriazolyl ester as shown by comparison with other reagents such as DCC, DCC/DMAP, DCC/1-hydroxybenzotriazole, bromotris(dimethylamino)phosphonium hexafluorophosphate, or O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate and by 31P NMR analysis.This benzotriazolyl phosphonic ester intermediate was more reactive toward alcohols than toward amines, contrary to its carboxylic analogue.

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