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557762-80-8

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557762-80-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 557762-80-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,5,7,7,6 and 2 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 557762-80:
(8*5)+(7*5)+(6*7)+(5*7)+(4*6)+(3*2)+(2*8)+(1*0)=198
198 % 10 = 8
So 557762-80-8 is a valid CAS Registry Number.

557762-80-8Relevant articles and documents

Flavonoid derivatives as organometallic bioprobes

Anson, Christopher E.,Creaser, Colin S.,Malkov, Andrej V.,Mojovic, Ljubica,Stephenson, G. Richard

, p. 101 - 122 (2007/10/03)

The synthesis of organoiron derivatives of biologically active flavonoids is described. Lithium enolates of functionalised protected acetophenones and metallated derivatives of substituted aromatic rings have been employed as nucleophiles in combination with tricarbonyl(η5-cyclohexadienyl)iron electrophiles. Products have been converted into flavonoid and chalcone derivatives. Enolates generated from protected flavanones have also been used in nucleophile addition reactions, and a one-pot in situ protection, nucleophile addition, deprotection sequence is reported.

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