A series of 124 basic ethyl esters of alkoxy-substituted phenylcarbamic acids with the alkoxy group in position 2, 3 or 4 on the phenyl ring, and basic substituents attached to the ethyl moiety in position 2, were evaluated for in vitro antimycobacterial activity against strains of Mycobacterium tuberculosis, Mycobacterium kansasii and Mycobacterium avium. In vitro antimycobacterial activity becomes higher with increasing hydrophobic properties of the alkoxy groups. The p- and m-substituted derivatives were more active than the o-substituted ones. Direct relationship between the structure of the basic substituents and the activity was not found.

Department of Inorganic and Organic Chemistry Faculty of Pharmacy Charles University 500 05 Hradec Králové Czechia

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