抗真菌剂。第4部分:新型吲哚[1,2 - c ] -1,2,4-苯并三嗪衍生物的合成及其对植物病原真菌的抗真菌活性
摘要:
在叔丁基亚硝酸盐(t- BuONO)存在下,通过改良的Sandmeyer反应获得了一系列新型的吲哚[1,2 - c ] -1,2,4-苯并三嗪衍生物。与可商购的农用杀菌剂氨甲唑相比,其浓度为50μg/ mL时,两种吲哚[1,2 - c ] -1,2,4-苯并三嗪5h和5k表现出更有希望和更显着的抗真菌活性在体外对五种植物病原真菌的抵抗力。清楚地表明,在吲哚[1,2 - c ] -1,2,4-苯并三嗪(5a)的吲哚环上引入适当的取代基将导致更有效的衍生物。
抗真菌剂。第4部分:新型吲哚[1,2 - c ] -1,2,4-苯并三嗪衍生物的合成及其对植物病原真菌的抗真菌活性
摘要:
在叔丁基亚硝酸盐(t- BuONO)存在下,通过改良的Sandmeyer反应获得了一系列新型的吲哚[1,2 - c ] -1,2,4-苯并三嗪衍生物。与可商购的农用杀菌剂氨甲唑相比,其浓度为50μg/ mL时,两种吲哚[1,2 - c ] -1,2,4-苯并三嗪5h和5k表现出更有希望和更显着的抗真菌活性在体外对五种植物病原真菌的抵抗力。清楚地表明,在吲哚[1,2 - c ] -1,2,4-苯并三嗪(5a)的吲哚环上引入适当的取代基将导致更有效的衍生物。
A highly efficient approach to indolo [1,2-a]quinoxaline derivatives through a Pd-catalyzed regioselective C–Holefination/cyclization sequence has been developed. This transformation has a wide range of substrates with various functional groups, and the corresponding heterocyclic products were obtained in good yields.
已经开发出了一种高效的方法,可通过Pd催化的区域选择性C–H烯化/环化序列制备吲哚[1,2- a ]喹喔啉衍生物。该转化具有多种具有各种官能团的底物,并且以良好的产率获得了相应的杂环产物。
PPTS‐Catalyzed Bicyclization Reaction of 2‐Isocyanobenzaldehydes with Various Amines: Synthesis of Diverse Fused Quinazolines
A PPTS (pyridinium p‐toluenesulfonate)‐catalyzed bicyclization reaction of 2‐isocyanobenzaldehydes as 1,5‐dielectrophiles with various amines has been developed. The reaction not only provides a simple and efficient strategy for the assembly of structurally diverse fused quinazoline derivatives from readily available substrates under metal‐free and mild conditions in a single step with only water and
Copper-Catalyzed Dehydrogenative C(sp<sup>2</sup>)–N Bond Formation via Direct Oxidative Activation of an Anilidic N–H Bond: Synthesis of Benzoimidazo[1,2-<i>a</i>]indoles
作者:Xiaoxia Wang、Na Li、Zhongfeng Li、Honghua Rao
DOI:10.1021/acs.joc.7b01617
日期:2017.10.6
A dehydrogenative C(sp2)–N bond-forming strategy viacopper-catalyzed intramolecular C–H/N–H coupling has been developed, which systematically unraveled the feasibility and practicality for benzoimdazo[1,2-a]indole formations through oxidative anilidic N–H activation. The merit of this strategy is illustrated by the broad tolerance of functionalities, as well as the utilization of extremely cheap copper
通过铜催化的分子内C–H / N–H偶联,形成脱氢C(sp 2)–N键形成策略,系统地揭示了苯并咪唑[1,2- a ]吲哚通过氧化形成的可行性和实用性。苯胺NH活化。功能广泛的耐受性说明了该策略的优点,并且利用极其廉价的铜催化以分步和原子经济的方式实现了潜在有用的吲哚稠合四环。
Cobalt-Catalyzed Direct C–H Carbonylative Synthesis of Free (<i>NH</i>)-Indolo[1,2-<i>a</i>]quinoxalin-6(5<i>H</i>)-ones
C–H carbonylative reaction of N-(2-(1H-indol-1-yl)phenyl)picolinamides for the synthesis of (NH)-indolo[1,2-a]quinoxalin-6(5H)-one skeletons has been developed. Using benzene-1,3,5-triyl triformate (TFBen) as the CO source and picolinamide as the traceless directing group, various free (NH)-indolo[1,2-a]quinoxalin-6(5H)-ones were obtained in good yields (up to 88%). Additionally, a series of product derivatizations
N-(2-(1 H-吲哚-1-基)苯基)吡啶啉酰胺的钴催化直接CH羰基化反应,用于合成(NH)-吲哚[1,2 - a ]喹喔啉-6(5)H)-骨架已经开发出来。以苯甲酸1,3,5-三甲酸三乙酯(TFBen)作为CO源,并以吡啶甲酸酰胺为无痕导向基团,得到了各种游离的(NH)-吲哚并[1,2 - a ]喹喔啉-6(5 H)-。获得高产(高达88%)。另外,证明了一系列产物衍生化,并且可以通过该方案容易地构建PARP-1抑制剂C的核心片段。
Electrochemical oxidative C–H/N–H cross-coupling for C–N bond formation with hydrogen evolution
作者:Yi Yu、Yong Yuan、Huilin Liu、Min He、Mingzhu Yang、Pan Liu、Banying Yu、Xuanchi Dong、Aiwen Lei
DOI:10.1039/c8cc09899a
日期:——
catalyst-free and exogenous-oxidant-free conditions, a series of C-3 aminated imidazo[1,2-a]pyridines were synthesized by electrochemical intermolecular oxidative C–H/N–H cross-coupling. Furthermore, by using a catalytic amount of ferrocene as the mediator, electrochemical intramolecular oxidative C–H/N–H cross-coupling for the synthesis of 10H-benzo[4,5]imidazo[1,2-a]indole derivatives has also been accomplished
在无金属催化剂和无外源氧化剂的条件下,通过电化学分子间氧化C–H / N–H交叉偶联反应,合成了一系列C-3胺化的咪唑并[1,2- a ]吡啶。此外,通过使用催化量的二茂铁作为介体,用于合成10 H-苯并[4,5]咪唑并[1,2- a ]吲哚衍生物的电化学分子内氧化C–H / N–H交叉偶联具有也完成了。