硼酸是中心重要的功能基序和合成前体。可见光诱导的硼酸化可以提供结构多样化的硼酸盐,但一种广泛有效的光催化硼酸化方法可以影响包括强 C-O 键在内的多种底物的硼化,仍然难以实现。在此,我们报告了一种通用的、无金属的可见光诱导光催化硼化平台,该平台能够对苯酚和苯胺、氯芳烃以及其他卤代芳烃的富电子衍生物进行硼化。该反应表现出优异的官能团耐受性,正如一系列结构复杂底物的硼化反应所证明的那样。值得注意的是,该反应是由吩噻嗪催化的,这是一种简单的有机光催化剂,MW< 200通过质子耦合电子转移机制介导了以前无法实现的可见光诱导的苯酚衍生物单电子还原,还原电位为~-3 V vs SCE。机理研究指出了光催化剂-碱相互作用的关键作用。
Palladium(II)-catalyzed ortho -arylation via phosphate-group-directed C–H activation
作者:Woo Hyung Jeon、Tae Seob Lee、Eun Jin Kim、Bongjin Moon、Jahyo Kang
DOI:10.1016/j.tet.2013.04.067
日期:2013.6
Aryl dialkyl phosphate, which is readily available from phenol, was a good substrate for the Pd(II) catalyzed aryl aryl coupling reaction through ortho-C H activation. Although a phosphate group is regarded as a poor coordinating group, highly regioselective ortho-arylation could be achieved by employing Pd(OTf)(2)center dot 2H(2)O and Ar2IOTf as a catalyst and an aryl group source, respectively. The phosphate group of the resulting coupled product can be transformed into an aryl anion via reductive cleavage and used for further C-C bond formation. (C) 2013 Elsevier Ltd. All rights reserved.
TETRAHYDROPYRROLE COMPOUND, PREPARATION METHOD THEREFOR, PHARMACEUTICAL COMPOSITION CONTAINING SAME, AND USE THEREOF
The present invention discloses a tetrahydropyrrole compound, a preparation method therefor, a pharmaceutical composition containing the same, and a use thereof. The tetrahydropyrrole compound of the present invention is represented by general formula (I). The tetrahydropyrrole compound of the present invention has better inhibitory effects on the positive symptoms of schizophrenia, and the potency thereof is equivalent to or slightly stronger than that of the positive drug olanzapine. In addition, the compound of the present invention has dual inhibitory effects on D2 receptors and DAT receptors, and is effective for treating schizophrenia and improving negative symptoms and cognitive functions, while also reducing vertebral side effects and prolactin secretion.