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1420809-03-5

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1420809-03-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1420809-03-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,2,0,8,0 and 9 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1420809-03:
(9*1)+(8*4)+(7*2)+(6*0)+(5*8)+(4*0)+(3*9)+(2*0)+(1*3)=125
125 % 10 = 5
So 1420809-03-5 is a valid CAS Registry Number.

1420809-03-5Downstream Products

1420809-03-5Relevant articles and documents

Synthesis of unsaturated macrocycles by ru-catalyzed ring-closing metathesis: A comparative study

Grisi, Fabia,Costabile, Chiara,Grimaldi, Anna,Viscardi, Colomba,Saturnino, Carmela,Longo, Pasquale

, p. 5928 - 5934 (2013/01/15)

The activity and stereoselectivity of phosphane- and N-heterocyclic carbene (NHC)-containing ruthenium benzylidene complexes have been evaluated in macrocyclic ring-closing olefin metathesis to produce unsaturated lactones and lactams. The success of the macrocyclization depends on the nature of the ligand (phosphane or N-heterocyclic carbene) on the ruthenium center and on the NHC properties. As for stereoselectivity, E/Z ratios seem to be influenced not only by the nature of the ruthenium catalyst but also by the thermodynamic stabilities of the resulting unsaturated macrocycles, as confirmed by theoretical results. The synthesis of 14-and 15-membered macrolactones and macrolactams by ruthenium-catalyzed ring-closing metathesis is investigated. The reaction outcome is influenced both by the nature of the catalyst and the diene substrate.

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