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109172-66-9

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109172-66-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 109172-66-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,1,7 and 2 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 109172-66:
(8*1)+(7*0)+(6*9)+(5*1)+(4*7)+(3*2)+(2*6)+(1*6)=119
119 % 10 = 9
So 109172-66-9 is a valid CAS Registry Number.

109172-66-9Relevant articles and documents

Asymmetric Induction in 1,3-Dipolar Cycloaddition of Diazofluorene with Menthyl or 8-Phenylmenthyl Acrylate and Fumarate Derivatives

Okada, Keiji,Samizo, Fumio,Oda, Masaji

, p. 93 - 96 (1987)

Optical yields in the 1,3-dipolar cycloaddition of diazofluorene with chiral acrylate or fumarate derivatives were found to be considerably improved by use of Corey's 8-phenylmenthyl group as a chiral O-alkyl group in these esters.The absolute stereochemistry of resulting cyclopropanes is different from the one expected from the "diazo-exchange" mechanism proposed by Walborsky et al.

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