α-(1-adamantyl)-β-diketones are now accessible by the alkylation of Co(II) complexes of β-diketones with 1-bromoadamantane. The intermediacy of adamantyl cation is proposed. Co(II), Co(III) and Zn(II) complexes of pentane-2,4-dione react with alkyl halides precursors of stabilized carbeniumions, to give 3-alkylpentane-2,4-diones.
Abstract New zinc(II) Schiff base complexes (Z1 and Z2) were prepared through the treatment of ONNO tetradentate Schiff base ligands (H2L1 and H2L2) with zinc acetylacetonate. Elemental analysis (C, H and N) and other spectroscopic techniques such as FT-IR and 1H NMR were used to characterize the produced ligands and their associated Zn(II) complexes. The structure of Z1 was explored by single crystal
摘要 通过用乙酰丙酮锌处理ONNO四齿席夫碱配体(H 2 L 1和H 2 L 2),制备了新的锌(II)席夫碱配合物(Z1和Z2)。元素分析(C、H 和 N)和其他光谱技术如 FT-IR 和1 H NMR 用于表征产生的配体及其相关的 Zn(II) 配合物。通过单晶 X 射线衍射分析探索了Z1的结构。Z1的结构研究表明它以中心对称二聚体的形式存在,其中五配位的 Zn(II) 离子相互连接通过从每个四齿席夫碱配体的酚氧原子之一到相反的锌 (II) 离子的 μ-苯氧基桥接。DFT 使用 B3LYP/Def2-TZVP 理论水平进行的理论计算表明,预期结果与实际结果相符。还通过使用 QTAIM 和 NCI 计算研究了样品分子之间存在的非共价相互作用的性质和类型。此外,还检测了合成的席夫碱配体及其各自的锌 (II) 复合物对两种革兰氏阳性菌(金黄色葡萄球菌和蜡状芽孢杆菌)和两种革兰氏阴性菌(大肠杆
Optimization of Monocarboxylate Transporter 1 Blockers through Analysis and Modulation of Atropisomer Interconversion Properties
作者:Simon D. Guile、John R. Bantick、Martin E. Cooper、David K. Donald、Christine Eyssade、Anthony H. Ingall、Richard J. Lewis、Barrie P. Martin、Rukhsana T. Mohammed、Timothy J. Potter、Rachel H. Reynolds、Stephen A. St-Gallay、Andrew D. Wright
DOI:10.1021/jm060995h
日期:2007.1.1
We have previously described a novel series of potent blockers of the monocarboxylate transporter, MCT1, which show potent immunomodulatory activity in an assay measuring inhibition of PMA/ionomycin-induced human PBMC proliferation. However, the preferred compounds had the undesirable property of existing as a mixture of slowly interconverting rotational isomers. Here we show that variable temperature NMR is an effective method of monitoring how alteration to the nature of the amide substituent can modulate the rate of isomer exchange. This led to the design of compounds with increased rates of rotamer interconversion. Moreover, some of these compounds also showed improved potency and provided a route to further optimization.
WO2007/119085
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Kozlov, S. K.; Alam, L. V.; Potekhin, V. M., Journal of General Chemistry of the USSR, 1982, vol. 52, # 2, p. 350 - 354
作者:Kozlov, S. K.、Alam, L. V.、Potekhin, V. M.、Bagal, V. N.、Ovchinnikov, V. I.、Tovstokhat'ko, F. I.