Cas 77670-20-3,(+)-N-benzyl-O-benzoylquininium chloride

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Check Digit Verification of cas no

The CAS Registry Mumber 77670-20-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,6,7 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 77670-20:
(7*7)+(6*7)+(5*6)+(4*7)+(3*0)+(2*2)+(1*0)=153
153 % 10 = 3
So 77670-20-3 is a valid CAS Registry Number.

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77670-20-3Relevant academic research and scientific papers

Asymmetric Induction in the Michael Reaction by Means of Chiral Phase-transfer Catalysts derived from Cinchona and Ephedra Alkaloids

Colonna, Stefano,Re, Alberto,Wynberg, Hans

, p. 547 - 552 (2007/10/02)

Asymmetric induction in the Michael reaction has been achieved using alkaloidonium salts in a two-phase system with optical yields of up to 36 and 26percent in the addition to αβ-unsaturated ketones of thiols and nitroalkanes respectively.The presence of a hydroxy-group β to the 'onium function is essential to achieve substantial asymmetric syntheses.

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