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66697-00-5

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66697-00-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 66697-00-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,6,9 and 7 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 66697-00:
(7*6)+(6*6)+(5*6)+(4*9)+(3*7)+(2*0)+(1*0)=165
165 % 10 = 5
So 66697-00-5 is a valid CAS Registry Number.

66697-00-5Relevant articles and documents

Titanium(III)-Mediated Synthesis of a 1,2,3-Tricarbonyl Moiety from an α-Oximido-β-keto Ester: Application to the Synthesis of the Carbacephem Nucleus

Gasparski, Catherine M.,Ghosh, Arun,Miller, Marvin J.

, p. 3546 - 3550 (1992)

A general procedure for the conversion of α-oximido-β-keto esters into vivinal tricarbonyl moieties by TiCl3 in aqueous, buffered (pH 5) conditions with acetone cosolvent was demonstrated.As applied to N-hydroxy β-lactam 17, which contained an α-oximido-β-keto ester side chain, these combined reductive and hydrolytic conditions effected simultaneous tricarbonyl formation and β-lactam N-O bond reduction.Vicinal tricarbonyl-containing N-unsubstituted β-lactam 18 was a direct precursor to semifunctionalized carbacephem 1.

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