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857349-14-5

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857349-14-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 857349-14-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,7,3,4 and 9 respectively; the second part has 2 digits, 1 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 857349-14:
(8*8)+(7*5)+(6*7)+(5*3)+(4*4)+(3*9)+(2*1)+(1*4)=205
205 % 10 = 5
So 857349-14-5 is a valid CAS Registry Number.

857349-14-5Relevant articles and documents

Synthesis of planar-chiral paracyclophanes via samarium(II)-catalyzed intramolecular pinacol coupling

Ueda, Tsuyoshi,Kanomata, Nobuhiro,Machida, Hajime

, p. 2365 - 2368 (2007/10/03)

(Chemical Equation Presented) A series of [n]jparacyclophanediols (n = 8-12) was synthesized by samarium-catalyzed pinacol coupling for their ansa-bridge formation. Enantiomerically pure [n]jparacyclophane esters were derived from the diols in a several steps via chiral resolution (for n = 10) or via crystallization-induced asymmetric transformation (for n = 11) by using amino alcohol auxiliaries and their selective cleavages.

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