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317373-82-3

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317373-82-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 317373-82-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,1,7,3,7 and 3 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 317373-82:
(8*3)+(7*1)+(6*7)+(5*3)+(4*7)+(3*3)+(2*8)+(1*2)=143
143 % 10 = 3
So 317373-82-3 is a valid CAS Registry Number.

317373-82-3Downstream Products

317373-82-3Relevant articles and documents

Chiral macrocyclic bis(oxazoline) Cu1 complexes - Structure/stereoselectivity relationships in catalytic cyclopropanations

Portada, Tomislav,Roje, Marin,Raza, Zlata,Caplar, Vesna,Zinic, Mladen,Sunjic, Vitomir

, p. 838 - 856 (2008/02/08)

The design and synthesis of 18 chiral macrocycles with built in C 2-symmetric bis(oxazoline) units is described and the catalytic properties of their copper(I) complexes in cyclopropanations of styrene with ethyl diazoacetate are assessed. The bridging of two homochiral centers in the bis(oxazoline) unit gives a macrocyclic ligand, which upon binding of Cu 1 is transformed into a macrocyclic catalytic complex containing a chiral cavity. Such a complex represents a conceptually new type of supramolecular organometallic catalyst, possessing a chiral reaction cavity. A clear relationship between catalyst structures and the stereoselectivity outcome in the catalytic cyclopropanations has been established and it is demonstrated that both the enantioselectivity and the diastereoselectivity can be independently modified by variation of the ligand structural parameters. The Cu1 complex of the ligand 3b gave a trans/cis diastereomeric ratio of 94:6 (de = 88%), representing the highest diastereoselectivity obtained to date for cyclopropanations catalyzed by the bis(oxazoline) class of complexes. An explanation of the observed relationship between stereochemical outcome and ligand structure is proposed. Wiley-VCH Verlag GmbH & Co. KGaA, 2007.

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