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116140-87-5

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116140-87-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 116140-87-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,6,1,4 and 0 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 116140-87:
(8*1)+(7*1)+(6*6)+(5*1)+(4*4)+(3*0)+(2*8)+(1*7)=95
95 % 10 = 5
So 116140-87-5 is a valid CAS Registry Number.

116140-87-5Downstream Products

116140-87-5Relevant articles and documents

Enantiotopic-Group Differentiation. Asymmetric Monoesterification of Malonic Acids Using Cinchona Alkaloid Derivatives

Hiratake, Jun,Shibata, Kayoko,Baba, Naomichi,Oda, Jun'ichi

, p. 278 - 280 (2007/10/02)

2,2-Dimethyl-5-methyl-5-phenyl-4,6-dioxo-1,3-dioxane (1) was cleaved asymmetrically, by nucleophilic attack of primary alkoxide ions, paired with N-benzylquaternary ammonium cations, derived from cinchona alkaloids, to give optically active monoalkyl malonates 3 with moderate stereoselectivity.The ester group of 3 was selectively reduced to afford optically active α-methyltropic acid (5) in good yield.The relationship between the structure of ammonium cations and the direction of stereoselectivity is described.

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