Alkylation of Ethyl Nitroacetate in the Absence of Solvent
作者:E. Díez-Barra、A. de la Hoz、A. Moreno
DOI:10.1080/00397919408010189
日期:1994.7
Abstract Alkylation of ethyl nitroacetate by solid-liquid phase transfer catalysis (PTC) in solvent-free conditions has been performed. In regard to other chemical procedures the method provide a simplification of the experimental procedure; however, not in all cases, yield are improved.
Lipophilic β-Cyclodextrin Cyclic−Nitrone Conjugate: Synthesis and Spin Trapping Studies
作者:Yongbin Han、Yangping Liu、Antal Rockenbauer、Jay L. Zweier、Grégory Durand、Frederick A. Villamena
DOI:10.1021/jo900856x
日期:2009.8.7
chain would impart membrane targeting property. The two constitutional racemic isomers, 4a and 4b, were separated using preparative HPLC, and structural analysis and self-aggregation properties were carried out using NMR, induced circular dichroism, dynamic light scattering, transmission electron microscopy, and computational approach. EPR spin trapping of O2•− by 4a and 4b was only successful in DMSO and
硝酮自旋陷阱通常用作探针,用于使用电子顺磁共振 (EPR) 光谱识别化学和生物系统中的瞬态自由基。硝酮还发现可用作治疗自由基介导的疾病的治疗剂。因此,需要在一种分子设计中结合对超氧自由基阴离子 (O 2 •- ) 的高反应性、更持久的超氧化物加合物、增强的生物利用度和选择性靶向的自旋阱。在这项工作中,合成了一个硝酮自旋陷阱4,它通过酰胺键连接到 β-环糊精 (β-CD) 和十二烷基链,期望β-环糊精会增加对O 2 •-和持久的 O 2 •-加合物,而亲脂链将赋予膜靶向特性。两种结构外消旋异构体4a和4b使用制备型 HPLC 进行分离,并使用 NMR、诱导圆二色性、动态光散射、透射电子显微镜和计算方法进行结构分析和自聚集特性。4a和4b对 O 2 •−的EPR 自旋捕获仅在 DMSO 中成功,而在水性体系中无效,这很可能是由于4的两亲性特征这可以有利于阻碍自由基添加到硝酮的构象(或聚集)。4a
Synthesis of γ,δ-Didehydrohomoglutamates by the Phosphine-Catalyzed γ-Addition Reaction to Acetylenic Esters
作者:Carlos Alvarez-Ibarra、Aurelio G. Csákÿ、Cristina Gómez de la Oliva
DOI:10.1021/jo9918192
日期:2000.6.1
Gelin,R.; Gelin,S., Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1963, vol. 256, p. 3705 - 3708
作者:Gelin,R.、Gelin,S.
DOI:——
日期:——
Baxter, Robert L.; Smith, Shona L.; Martin, Jennifer R., Journal of the Chemical Society. Perkin transactions I, 1994, # 16, p. 2297 - 2300
作者:Baxter, Robert L.、Smith, Shona L.、Martin, Jennifer R.、Hanley, A. Bryan