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
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。