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138751-74-3

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138751-74-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138751-74-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,7,5 and 1 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 138751-74:
(8*1)+(7*3)+(6*8)+(5*7)+(4*5)+(3*1)+(2*7)+(1*4)=153
153 % 10 = 3
So 138751-74-3 is a valid CAS Registry Number.

138751-74-3Downstream Products

138751-74-3Relevant articles and documents

Fluoronaphthyridines as Antibacterial Agents. 4. Synthesis and Structure-Activity Relationships of 5-Substituted-6-fluoro-7-(cycloalkylamino)-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic Acids

Bouzard, D.,Cesare, P. Di,Essiz, M.,Jacquet, J. P.,Ledoussal, B.,et al.

, p. 518 - 525 (2007/10/02)

A series of 5-substituted-6-fluoro-7-(cycloalkylamino)-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acids have been prepared and tested for their in vitro and in vivo antibacterial activities.The 5-methyl group gave better in vitro activity with the 1-cyclopropyl appendage, but poorer activity with the 1-tert-butyl moiety.With the 1-(2,4-difluorophenyl) substitution, the influence of the 7-cycloalkylamino group was determinant: a (3S)-3-aminopyrrolidine was shown to enhance greatly the in vitro and in vivo activity of the 5-methyl derivative.Compound 33 (BMY 43748) was selec ted as a promising candidate for an improved therapeutic agent.

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