摘要:
Four bile acid-triazine conjugates: N-2',N-2'-dimethyl-6'-(3 alpha-hydroxy-5 beta-24-norcholyl)-1',3',5'-triazine-2',4'-diamine (lithocholyl triazine, 4a), N-2',N-2'-dimethyl-6'-(3 alpha,7 alpha-dihydroxy-5 beta-24-norcholyl)-1',3',5'-triazine-2',4'-diamine (chenodeoxycholyl triazine, 4b), N-2',N-2'-dimethyl-6'6'-(3 alpha,12 alpha-dihydroxy-5 beta-24-norcholyl)-1',3',5'-triazine-2',4'-diamine (deoxycholyl triazine) (4c), and N-2',N-2'-dimethyl-6'-(3 alpha,7 alpha,12 alpha-trihydroxy-5 beta-24-norcholyl)-1',3',5'-triazine-2',4'-diamine (cholyl triazine) (4d) have been prepared and characterized by liquid and solid state NMR. An improved synthetic method produced better yields and an easier purification procedure for 4d than reported in the literature. Single crystal structure of 4a is reported: empirical formula C28H47N5O, monoclinic P2(1) space group with unit cell dimensions, a 18.7135(5) angstrom, b 7.4510(2) angstrom, c 19.3073(5) angstrom, beta 95.7290(10)degrees, volume 2678.65(12) angstrom(3). (C) 2009 Elsevier B. V. All rights reserved.