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169872-70-2

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169872-70-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 169872-70-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,9,8,7 and 2 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 169872-70:
(8*1)+(7*6)+(6*9)+(5*8)+(4*7)+(3*2)+(2*7)+(1*0)=192
192 % 10 = 2
So 169872-70-2 is a valid CAS Registry Number.

169872-70-2Relevant articles and documents

Synthesis of azophenolic crown ethers of Cs symmetry incorporating cis-1-phenylcyclohexane-1,2-diol residues as a steric barrier and diastereotopic face selectivity in complexation of amines by their diastereotopic faces

Naemura, Koichiro,Takeuchi, Sachiko,Asada, Masaki,Ueno, Koji,Hirose, Keiji,et al.

, p. 1429 - 1436 (2007/10/02)

Azophenolic crown ethers 1 and 2 of Cs symmetry incorporating cis-1-phenylcyclohexane-1,2-diol residues as a steric barrier have been prepared.Diastereotopic face selectivity in complexation with 2-methoxyethylamine, n-propylamine and ethanolamine was examined using temperature-dependent 1H NMR spectroscopy.Both bind ethanolamine stereoselectively to one of their diastereotpic faces; the prediction of which diastereotopic complex was preferentially formed is made on the basis of a CPK molecular-model examination of the complexes.

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