Determination of Lipophilicity of Allyl Thiosemicarbazide, N¹-Thiocarbamylamidrazone Derivatives, and their Cyclic Products by RP-HPLC, RP-TLC, and Theoretical Methods: Effects of Selected Compounds on the CNS of Mice

Abstract

The allyl thiosemicarbazide, N 1 -thiocarbamylamidrazone derivatives and the products of their cyclisation: the 1,2,4-triazole, 1,3,4-thiadiazole, 1,2,4-triazole[3,4-b]1,3-thiazine, 1,2,4-triazole[3,2-b]1,3-thiazine, 1,3,4-thiadiazole[3,2-a]pyrimidine, 5,6-dihydrothiazolo[2,3-c][1,2,4]triazole and benzoic acid derivatives have been analyzed by RP-HPLC and RP-TLC methods using the methanol-water mixtures as the mobile phase and the octadecyl stationary phase. The lipophilicity was expressed as the chromatographically derived descriptors: mean of k (mk), mean of log k (mlogk), logk w , S, and φ 0 , scores of k, logk and R M corresponding to the first principal component.Additionally the authors propose to introduce a descriptor (logk m ) corresponding to the residual specific interactions.Chromatographic parameters of lipophilicity were compared with the partition coefficient (logP) calculated by various softwares (milogP, clogP, AlogPs, AClogP, AlogP, MlogP, KOWWIN, XlogP2, XlogP3). The matrices were created with logk w or R MW and logP and Downloaded by [Emory University] at 06:30 03 August 2015 2 they have been the subject of PCA analysis. The effects of the selected compounds on the central nervous system (CNS) of mice were studied.

Assessment of Lipophilicity Parameters of Antimicrobial and Immunosuppressive Compounds

“…Among other separation techniques, micellar liquid chromatography (MLC) or micellar electrokinetic chromatography (MEEKC), respectively, in which the mobile phase comprises surfactants that allow better mapping of penetration of molecules through biomembranes can be also be used for lipophilicity determination [ 7 ]. The literature review shows that numerous publications have dealt with the subject of determining the lipophilicity of various bioactive compounds using chromatographic methods [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ].…”