Nitrogen–Iodine Exchange of Diaryliodonium Salts: Access to Acridine and Carbazole
摘要:
A nitrogen iodine exchange protocol of diaryliodonium salts with sodium azide salt is developed for general construction of significant functional acridines and carbazoles, in which introduction of nitrogen at a late stage was successfully established avoiding heteroatom incompatibility. Inorganic sodium azide served as the sole nitrogen atom source in this transformation. The diversiform functional acridines and carbazoles were comprehensively achieved through annulated diaryliodonium salts, respectively. Notably, Acridine orange (a fluorescent indicator for cell lysosomal dye) and Carprofen (a non steroidal anti-inflammatory drug) were efficiently established through this protocol.
carbonylation reaction for the synthesis of fluoren‐9‐ones from 2‐halogenated biphenyls using phenyl formate as a carbon monoxide surrogate was achieved. The combined use of cesium carbonate and o‐anisic acid resulted in a remarkable rate enhancement, where the reaction was complete within 3 min in some cases. Mechanistic studies indicated that the turnover‐limiting step of the reaction was the C−H bond‐cleaving
Broad activity of diphenyleneiodonium analogues against Mycobacterium tuberculosis, malaria parasites and bacterial pathogens
作者:Nghi Nguyen、Danny W. Wilson、Gayathri Nagalingam、James A. Triccas、Elena K. Schneider、Jian Li、Tony Velkov、Jonathan Baell
DOI:10.1016/j.ejmech.2017.10.010
日期:2018.3
evaluated primarily for in vitro efficacy against Gram-positive and Gram-negative bacteria, commonly responsible for nosocomial and community acquired infections. In addition, we also assessed the activity of these compounds againstMycobacteriumtuberculosis (Tuberculosis) and Plasmodium spp. (Malaria). This led to the discovery of highly potent compounds active against bacterial pathogens and malaria parasites
α-Bromoacrylic Acids as C1 Insertion Units for Palladium-Catalyzed Decarboxylative Synthesis of Diverse Dibenzofulvenes
作者:Minghao Zhang、Wenbo Deng、Mingjie Sun、Liwei Zhou、Guobo Deng、Yun Liang、Yuan Yang
DOI:10.1021/acs.orglett.1c01888
日期:2021.8.6
Herein α-bromoacrylic acids have been employed as C1 insertion units to achieve the palladium-catalyzed [4 + 1] annulation of 2-iodobiphenyls, which provides an efficient platform for the construction of diverse dibenzofulvenes. This protocol enables the formation of double C(aryl)–C(vinyl) bonds via a C(vinyl)–Br bond cleavage and decarboxylation. It is particularly noteworthy that the method features
Photochemical Generation and Reactivity of Naphthyl Cations:cine Substitution
作者:Micha Slegt、Floor Minne、Han Zuilhof、Hermen S. Overkleeft、Gerrit Lodder
DOI:10.1002/ejoc.200700338
日期:2007.11
donium tetrafluoroborate in methanol regiospecifically yield the naphthalen-1- and -2-yl ethers but afford scrambled 1- and 2-phenylnaphthalene Friedel-Crafts products. It is demonstrated that singlet naphthyl cations account for the formation of the naphthyl ethers, but that the cine substitution is most likely to be due to the intermediacy of triplet naphthyl cations. According to the experiments
萘-1-基(苯基)碘四氟硼酸盐和萘-2-基(苯基)碘四氟硼酸盐在甲醇中的光化学溶剂分解区域特异性地产生萘-1-和-2-基醚,但提供杂乱的1-和2-苯基萘Friedel -工艺品产品。证明单线态萘基阳离子导致了萘基醚的形成,但电影取代最有可能是由于三线态萘基阳离子的中介作用。根据这里报道的实验,单线态萘基阳离子的能量低于它们的三线态异构体。甲醇中阳离子的高水平 MO 计算支持这一发现。
Versatile telluracycle synthesis via the sequential electrophilic telluration of C(sp<sup>2</sup>)–Zn and C(sp<sup>2</sup>)–H bonds
作者:Bin Wu、Melvina Melvina、Xiangyang Wu、Edwin Kok Lee Yeow、Naohiko Yoshikai
DOI:10.1039/c7sc01162h
日期:——
We report herein a new approach for the synthesis of tellurium-bridged aromatic compounds based on the sequential electrophilic telluration of C(sp2)–Zn and C(sp2)–Hbonds with tellurium(IV) chlorides. A combination of transition metal-catalyzed (migratory) arylmetalation of alkynes and sequential telluration allows for the expedient construction of a library of functionalized benzo[b]tellurophenes
我们在此报告了一种新的合成碲桥接芳族化合物的新方法,该方法基于C(sp 2)-Zn和C(sp 2)-H键与碲(IV)氯化物的顺序亲电碲化。炔烃的过渡金属催化(迁移)芳基金属化和连续碲化相结合,可以方便地构建功能化的苯并[ b ]碲二苯酚文库。此外,可以容易地从相应的2-碘杂双联芳基合成各种杂芳基稠合的苯并二氮杂苯并与其他新颖的碲嵌入的多环芳族化合物。