通过2-乙炔基-N-三苯基磷酰亚苯胺苯胺和α-二氮酮通过酮亚胺中间体的串联反应,以中等至良好的产率制备了5 H-苯并[ b ]咔唑。通过使用这种方法,苯并[ b ]苯并[5,6]吲哚并[3,2- h ]咔唑,芴[9,1- ab ]咔唑和芴[9,1- ab ]氟[1',9 ′:5,6,7] indolo [3,2- h ]咔唑是在一个锅中制成的。而且,最终产物发出的光在410-521 nm范围内,量子产率高达62%。
2-Substituted quinolines and related derivatives can be rapidly prepared from (hetero)aryl halides and propargyl alcohols in the sense of a one-pot microwave-assisted coupling-isomerizationreaction (MACIR). First biological tests against trypanosomes and protozoans have revealed antiparasitic activity in the lower micromolar range.
Nonmetal-Catalyzed Iodination of Arenes with Iodide and Hydrogen Peroxide
作者:Jernej Iskra、Stojan Stavber、Marko Zupan
DOI:10.1055/s-2004-829136
日期:——
lecular halogens for direct halogenation has drawbacks in the difficult and dangerous handling of chlorine and bro- mine, while iodine is less reactive. Nature has solved this problem by evolving haloperoxidases, enzymes that oxi- dize halide salts into reactive hypohalous derivatives. 3 Its counterpart in chemistry, named oxidative halogenation, has been utilized for iodination with a plethora of catalysts
在强酸存在下,用 1 当量 KI 和 2 当量 30% 过氧化氢的 MeOH 溶液对芳烃进行氧化碘化。各种取代的苯甲醚、苯酚和苯胺以及均三甲苯和尿嘧啶的反应具有选择性且有效,分离的卤代芳烃分子的收率非常高。卤代有机分子是药物和农业化学中的重要化合物,1 并且它们是化学合成中的重要合成中间体,特别是对于 CC 偶联反应。2 使用分子卤素进行直接卤化的缺点是氯和溴的处理困难且危险,而碘的反应性较低。大自然通过进化卤过氧化物酶解决了这个问题,将卤化物盐氧化成反应性次卤衍生物的酶。3 其在化学中的对应物称为氧化卤化,已被用于与大量催化剂和氧化剂以及分子碘或更少的碘化反应
Gold‐Catalyzed Synthesis of π‐Extended Carbazole‐Based Systems and their Application as Organic Semiconductors
作者:Christoph M. Hendrich、Valentin D. Hannibal、Lukas Eberle、Leif E. Hertwig、Ute Zschieschang、Frank Rominger、Matthias Rudolph、Hagen Klauk、A. Stephen K. Hashmi
DOI:10.1002/adsc.202001461
日期:2021.3.2
Herein we describe a gold‐catalyzed bidirectional synthesis of N‐heteropolycyclic compounds bearing carbazole moieties – namely π‐extended benzodicarbazoles and π‐extendedindolocarbazoles. Overall, four previously unknown core structures were synthesized. This approach is convergent, modular and the gold‐catalyzed key step comprises of a cascade reaction starting from stable di‐azido compounds. The
本文中,我们描述了带有咔唑基团的N杂环多环化合物(即π扩展的苯并二咔唑和π扩展的吲哚并咔唑)的金催化双向合成。总体而言,合成了四个以前未知的核心结构。这种方法是收敛的,模块化的,金催化的关键步骤包括从稳定的叠氮基化合物开始的级联反应。对获得的分子进行了充分表征,并研究了它们的光学和电子性质以及在真空沉积产生的有机薄膜晶体管中的性能。测得的载流子迁移率高达0.3 cm 2 / Vs。
Development of a fluorogenic small substrate for dipeptidyl peptidase-4
non-fluorescent dipeptide analogue H-Gly-Pro-1 for the use as a fluorogenicsubstrate for dipeptidyl peptidase-4 (DPP-4). The progress of the enzymatic hydrolysis of H-Gly-Pro-1 with DPP-4 was monitored by fluorometric determination of 1 released into the reaction medium. The results suggest that 1 could be used as fluorophore in OFF-ON-type fluorogenic probes.
Synthesis and Structural Characterization of a Tetranuclear Platinum(II) Metallamacrocycle Containing 1,3-Diisocyanoarene Ligands
作者:Hajime Ito、Tsuyoshi Maeda、Masaya Sawamura
DOI:10.1246/bcsj.80.1981
日期:2007.10.15
A new tetranuclear platinum(II) metallamacrocycle, including four 1,3-diisocyanoarene ligands, was synthesized and characterized. The reaction of PtI2(cod) with an equimolar amount of the 1,3-diisocyanoarene ligand in dichloromethane under diluted conditions gave the metallamacrocycle [(PtI2)4(1,3-diisocyanoarene)4]. X-ray crystallographic analysis showed that the complex adopted a square ring structure with trans arrangement of coordinated isocyanides around the Pt atoms. GPC, ESI-MS, IR, and NMR analysis of the metallamacrocycle showed that the tetranuclear macrocyclic scaffold was maintained in solution.