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1198355-58-6

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1198355-58-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1198355-58-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,9,8,3,5 and 5 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1198355-58:
(9*1)+(8*1)+(7*9)+(6*8)+(5*3)+(4*5)+(3*5)+(2*5)+(1*8)=196
196 % 10 = 6
So 1198355-58-6 is a valid CAS Registry Number.

1198355-58-6Downstream Products

1198355-58-6Relevant articles and documents

Microwave assisted fluorination: an improved method for side chain fluorination of substituted 1-arylethanones

Krane Thvedt, Thor H?kon,Fuglseth, Erik,Sundby, Eirik,Hoff, B?rd Helge

experimental part, p. 9550 - 9556 (2010/02/27)

A two-step, one-pot microwave (MW) assisted fluorination of 1-arylethanones to their corresponding 1-aryl-2-fluoroethanones has been developed. The first step utilises Selectfluor as a fluorinating agent in methanol forming 1-aryl-2-fluoroethanones and their corresponding dimethyl acetals. In the second step, water is added and Selectfluor acts as a Lewis acid in the hydrolytic cleavage of the dimethyl acetals. Compared to the thermal synthesis, the MW assisted method leads to a reduction in reaction time both in the fluorination and for the dimethyl acetal cleavage. Moreover, the one-pot procedure reduces reagent and solvent consumption. The method is best suited for the preparation of 1-aryl-2-fluoroethanones containing substituents that deactivates electrophilic aromatic substitution, however highly electron deficient ketones such as 1-(3,5-dinitrophenyl)ethanone reacts more slowly. Reactions using electron rich aromatic ketones had a low regioselectivity, and also produced fluoroaromatic products.

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