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104599-76-0

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104599-76-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 104599-76-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,4,5,9 and 9 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 104599-76:
(8*1)+(7*0)+(6*4)+(5*5)+(4*9)+(3*9)+(2*7)+(1*6)=140
140 % 10 = 0
So 104599-76-0 is a valid CAS Registry Number.

104599-76-0Relevant articles and documents

Unusual anion effects in the iron-catalyzed formation of 3-hydroxyacrylates from aromatic aldehydes and ethyl diazoacetate

Alves, Luis Goncalo,Dazinger, Georg,Veiros, Luis F.,Kirchner, Karl

experimental part, p. 3160 - 3166 (2011/01/05)

Due to the lability of one of the CO ligands in irans-[Fe(PNP)(CO) 2Cl]+ this compound is an efficient catalyst for the coupling of a series of aromatic aldehydes with ethyl diazoacetate (EDA), which give, in most cases, selectively 3-hydroxyacrylates rather than β-oxo esters. This reaction is strongly dependent on the nature of the counterion, Whereas with BF4- the reaction proceeds with conversions up to 90%, in the case of the counterions NO3-, CF 3COO-, CF3SO3-, SbF 6-, and BAr'4- [Ar' = 3,5-(CF 3)2C6H3] no reaction took place. In the case of PF6- only up to 20% conversion was achieved. A conceivable mechanism for the coupling of aromatic aldehydes with EDA was established by means of DFT/B3LYP calculations, which allowed the rationalization of both the chemoselectivity and the role of the counterions.

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