Decaphyrin Conformers Stabilized by Pseudo-Rigid Dipyrrolylbenzothiadiazole Blocks: Synthesis, Structures and Interconversion [0.03%]
伪刚性二吡咯并苯并二噻唑单元稳定十菲啰啉异构体：合成、结构和互变异构化研究
Zhen Yang,Glib Baryshnikov,Shijun Li et al.
Zhen Yang et al.
Two conformers of a dipyrrolylbenzothiadiazole (DP-BTD) embedded decaphyrin(1.1.1.0.0.1.1.1.0.0) have been synthesized and separated, exhibiting crescent-shaped and figure-eight conformations, respectively. Incorporation of the hydrogen bon...
Selective Synthesis of Chiral Carbocycles by Iridium-Catalyzed Asymmetric Mono-, Double-, or Triple Hydrogenation of Cyclic Dienones [0.03%]
环状二烯酮的不对称单氢化、双氢化或三氢化选择性合成手性碳环
Bram B C Peters,Jia Zheng,Haili Zhang et al.
Bram B C Peters et al.
A divergent N,P-iridium-catalyzed asymmetric hydrogenation of cyclic dienones into chiral cyclohexenones, cyclohexanones, or cyclohexanols is described. The π-bonds in cyclic dienones underwent hydrogenation in a sequential manner, favorin...
Dihydrogen Phosphate Anion-Templated Supramolecular Assembly with Bistable [3]Rotaxane: Application in Selective and Sensitive Picric Acid Detection [0.03%]
二氢磷酸根阴离子模板的超分子[Bistable[3]]Rotaxane聚集体：选择性灵敏检测苦味酸传感器应用
Anjali Kumari,Suvankar Dasgupta
Anjali Kumari
A bistable [3]rotaxane comprising [23]crown ether and a pyrene fluorophore selectively exhibited dramatic pyrene excimer emission in the presence of the dihydrogen phosphate anion due to the generation of a supramolecular assembly. The asse...
Spatially Decoupled Fluorescent Amphiphiles for pH-Controlled Anion Detection in Water [0.03%]
空间分离的荧光两亲剂，用于水中的pH控制阴离子检测
Soohyung Kim,Seungyeon Hyun,Dongwhan Lee
Soohyung Kim
Recognition of anions in water remains a key challenge in supramolecular chemistry. We report pH-switchable multipodal amphiphiles that detect hydrophobic anions in aqueous media by a fluorescence turn-on response. An alternating arrangemen...
Electrochemical Nitrooxylation and NO2 Elimination-Grignard Addition for the Oxa-Quaternization of Saturated N-Heterocycles: Access to α-Aryl-α-hydroxy Lactams [0.03%]
电化学硝基氧化和NO2消除-格氏试剂加成反应构建饱和N杂环的氧季碳：用于合成α-芳基-α-羟基内酯抗生素的关键中间体
Ángel A Nolasco-Hernández,Leticia Quintero,Mario González-Perea et al.
Ángel A Nolasco-Hernández et al.
The development of an electrochemical nitrooxylation reaction of 3-alkoxyamino lactams A to 3-nitrooxylated lactams B allowed the invention of a NO2 elimination-Grignard reagent addition for the C3-oxa-quaternization of N-heterocycles. With...
How Far Can Trinitromethyl Substitution Be Pushed on a Single 1,2,3-Triazole Ring? [0.03%]
单个1,2,3-三唑环上能够引入多少 triflate 实例？
Jatinder Singh,Haixiang Gao,Richard J Staples et al.
Jatinder Singh et al.
Sequential nitration on a 1,2,3-triazole framework was explored to probe access to a maximally nitrated (nine-nitro) triazole species, although the fully nitrated product could not be isolated. Instead, a heptanitro product formed through a...
Chiral Phosphoric Acid and BF3·THF Relay Catalytic System Enables a Formal Asymmetric Aza-Baeyer-Villiger Rearrangement [0.03%]
手性磷酸和BF3·THF催化剂体系实现aza-baeyer-villiger重排反应的不对称催化
Xi-Liang Liu,Yi-Wen Zhao,Yu-Heng Lu et al.
Xi-Liang Liu et al.
A relay catalytic system comprising chiral phosphoric acid (CPA) and BF3·THF enables a formal asymmetric aza-Baeyer-Villiger rearrangement of cyclobutanones with a newly designed dinaphthylphosphinyl hydroxylamine (DNPH) reagent. The strat...
Defluorinative Alkene-Carbonyl Coupling Enabled by Photoredox Catalysis: An Access to Allylic Alcohols [0.03%]
光氧化还原催化脱氟化烯烃-羰基偶联反应合成烯丙醇类化合物
Ting-Ting Miao,Rong-Bin Liang,Xi Wang et al.
Ting-Ting Miao et al.
The defluorinative coupling of fluoroalkenes with carbonyl compounds provides a direct and efficient strategy to valuable allylic alcohols. However, existing methods typically rely on transition-metal catalyst, stoichiometric reductants, or...
Cyclocarbonickelation-Arylation Cascade under Ligand-Free Conditions: Access to Dibenzoxepine, Oxathiepine, and Thiazepine Frameworks and Mechanistic Insights [0.03%]
无配体条件下环卡宾镍化-芳构化串联反应：二苯并氧杂环庚三烯、噁噻平和噻唑平骨架的构建及机理研究
Sk Shamim Ahamed,Uma Sankar Mandal,Rabindranath Lo et al.
Sk Shamim Ahamed et al.
A ligand-free, nickel-catalyzed one-pot cyclocarbonickelation-arylation cascade of functionalized bromoalkyne substrates enables efficient and regioselective access to dibenzoxepine, dibenzoxathiepine, and dibenzothiazepine frameworks in go...
Enantioselective Synthesis of Chiral Cyclopentenes by Relay Catalysis from Terminal Alkynes, Enones, and Syngas [0.03%]
末端炔烃、烯酮和合成气经接力催化环化制备手性环戊烯化合物
Jing Zhao,Lin He,Hui Lv
Jing Zhao
A novel relay catalytic strategy for the asymmetric functionalization of terminal alkynes by synergistically integrating Rh-catalyzed hydroformylation with N-heterocyclic carbene (NHC)-catalyzed asymmetric annulation has been developed. Thi...