Synthesis and Hepatic Transport of Strongly Fluorescent Cholephilic Dipyrrinones
作者:Zachary R. Woydziak、Stefan E. Boiadjiev、Wilma S. Norona、Antony F. McDonagh、David A. Lightner
DOI:10.1021/jo0511041
日期:2005.10.1
A new class of highly fluorescent (φF 0.3−0.8) low molecular weight water-soluble cholephilic compounds has been synthesized in two steps from dipyrrinones. The dipyrrinone nitrogens are first bridged by reaction with 1,1‘-carbonyldiimidazole to form an N,N‘-carbonyldipyrrinone (3H,5H-dipyrrolo[1,2-c:2‘,1‘-f]pyrimidine-3,5-dione) nucleus, and a sulfonic acid group is then introduced at C(8) by reaction
一类新的高荧光(φ的˚F 0.3-0.8)低分子量的水溶性化合物cholephilic已经从dipyrrinones两个步骤被合成。首先通过与1,1'-羰基二咪唑反应来桥接二吡啶酮氮,以形成N,N'-羰基二吡咯烷酮(3 H,5 H -dipyrrolo [1,2- c:2',1' - f ]嘧啶-3 (5-5-二酮)核,然后通过与浓H 2 SO 4反应在C(8)处引入一个磺酸基。生成的磺化氮,氮分离'-羰基桥联的二吡啶酮(“磺基发光剂”)作为它们的钠盐。当内酰胺环的烷基取代基从乙基延长到癸基时,硫磺胶在保持水溶性的同时变得越来越亲脂。在静脉内输注大鼠后,低分子量硫磺菊在胆汁和尿液中均被迅速排泄,而较高分子量的硫磺菊在胆汁中的排泄则更为选择性。在缺乏多药耐药相关转运蛋白Mrp2(ABCC2)的突变大鼠中,硫磺菊的肝胆汁排泄被部分但不是完全阻断。这些观察结果表明开发具有临床诊断潜力的简单硫磺粉
Unusual tosyl transfer solvolysis reaction to 3-<i>n</i>-butyl-4-methyl-5,5-di-<i>p</i>-toluenesulfonyl- 3 -pyrrolin-2-one
作者:Zachary R. Woydziak、Brian J. Frost、David A. Lightner
DOI:10.1002/jhet.5570420441
日期:2005.5
following solvolysis of a mixture of 5-bromo-3-n-butyl-4-methyl-2-p-toluenesulfonylpyrrole (4b) and 5-bromo-4-n-butyl-3-methyl-2-p-toluenesulfonyl-pyrrole (4a) in trifluoroacetic acid and water, a reaction designed to produce 5-p-toluenesulfonyl-3-pyrrolin-2-ones, e.g., 5a and 5b.
的标题化合物(1)分离,在20-30%的回收率以下5-溴-3-的混合物的溶剂分解Ñ丁基-4-甲基-2- p -toluenesulfonylpyrrole(图4b)和5-溴-4- Ñ丁基-3-甲基-2- p甲苯磺酰吡咯(4a中在三氟乙酸和水,设计成产生5-反应)p甲苯磺酰基-3-吡咯啉-2-酮,例如,图5a和5b中。
Synthesis of a New Lipophilic Bilirubin. Conformation, Transhepatic Transport and Glucuronidation
作者:Justin O. Brower、David A. Lightner、Antony F. McDonagh
DOI:10.1016/s0040-4020(00)00710-9
日期:2000.9
soluble in nonpolar solvents than either bilirubin itself or its analogs with ethyls in place of vinyls (3 and 4). The increased lipophilicity of 1 and 2 allowed, for the first time, vapor pressure osmometric molecular wt. determinations of a bilirubin acid, showing in CHCl3 solvent: MWobs=632±10 for 1, and 637±10 for 2 (both formula weight 644)—data that clearly indicate monomers and no dimers. The