Search Results - "Cheng, Chien Hong"

Reaching Green: Heterocycle Synthesis by Transition Metal‐Catalyzed C−H Functionalization in Sustainable Medium by Santhoshkumar, Rajagopal, Cheng, Chien‐Hong

“…Catalytic C−H functionalization has emerged as an efficient alternative to traditional coupling reactions. However, some of these reactions depend on…”
Get full text

Diastereoselective [3+2] Annulation of Aromatic/Vinylic Amides with Bicyclic Alkenes through Cobalt-Catalyzed C−H Activation and Intramolecular Nucleophilic Addition by Gandeepan, Parthasarathy, Rajamalli, Pachaiyappan, Cheng, Chien-Hong

“…A highly diastereoselective method for the synthesis of dihydroepoxybenzofluorenone derivatives from aromatic/vinylic amides and bicyclic alkenes is described…”
Get full text

Cobalt-Catalyzed Oxidative Annulation of Nitrogen-Containing Arenes with Alkynes: An Atom-Economical Route to Heterocyclic Quaternary Ammonium Salts by Prakash, Sekar, Muralirajan, Krishnamoorthy, Cheng, Chien-Hong

“…Four cobalt‐catalyzed oxidative annulation reactions of nitrogen‐containing arenes with alkynes proceeds by C−H activation, thus leading to biologically useful…”
Get full text

Cobalt‐Catalyzed Annulation Reactions via C−H Bond Activation by Prakash, Sekar, Kuppusamy, Ramajayam, Cheng, Chien‐Hong

“…Considerable research attention has been directed towards the use of first‐row transition metals in organic synthesis. The more abundant, and less expensive…”
Get full text

Synthesis of Phenanthridinones from N-Methoxybenzamides and Arenes by Multiple Palladium-Catalyzed CH Activation Steps at Room Temperature by Karthikeyan, Jaganathan, Cheng, Chien-Hong

“…Many steps make light work: Substituted phenanthridinones can be obtained with high regioselectivity and in very good yields by palladium‐catalyzed cyclization…”
Get full text

One-Pot Synthesis of Isoquinolinium Salts by Rhodium-Catalyzed CH Bond Activation: Application to the Total Synthesis of Oxychelerythrine by Jayakumar, Jayachandran, Parthasarathy, Kanniyappan, Cheng, Chien-Hong

“…It's worth its salt: The title reaction leads to the synthesis of highly substituted isoquinolinium salts (see scheme; Cp*=Me5C5). The reaction proceeds…”
Get full text

Rhodium(III)-Catalyzed Synthesis of Cinnolinium Salts from Azobenzenes and Alkynes: Application to the Synthesis of Indoles and Cinnolines by Muralirajan, Krishnamoorthy, Cheng, Chien-Hong

“…Versatile salts: A new rhodium‐catalyzed synthesis of cinnolinium salts from various azobenzenes and alkynes under air is described. These salts readily…”
Get full text

Regioselective Synthesis of Indenols by Rhodium-Catalyzed CH Activation and Carbocyclization of Aryl Ketones and Alkynes by Muralirajan, Krishnamoorthy, Parthasarathy, Kanniyappan, Cheng, Chien-Hong

“…Ketones and alkynes join together: The catalytic title reaction proceeds rapidly at 120 °C and requires only 1 hour for completion (see scheme). The reaction…”
Get full text

A Highly Efficient Universal Bipolar Host for Blue, Green, and Red Phosphorescent OLEDs by Chou, Ho-Hsiu, Cheng, Chien-Hong

“…The bipolar host material BCPO (bis‐4‐ (N‐carbazolyl)phenylphosphine oxide) containing a phosphine oxide and two carbazole groups, synthesized in three steps,…”
Get full text

Regioselective Synthesis of Indoles via Rhodium-Catalyzed CH Activation Directed by an In-Situ Generated Redox-Neutral Group by Muralirajan, Krishnamoorthy, Cheng, Chien-Hong

“…A regioselective synthesis of indoles from arylhydrazine hydrochlorides with alkynes and diethyl ketone catalyzed by a rhodium complex is described. A possible…”
Get full text

Transition-Metal-Catalyzed π-Bond-Assisted CH Bond Functionalization: An Emerging Trend in Organic Synthesis by Gandeepan, Parthasarathy, Cheng, Chien-Hong

“…Transition‐metal‐catalyzed CH activation is considered to be an important tool in organic synthesis and has been accepted and widely used by chemists because…”
Get full text

Easy Access to 1-Amino and 1-Carbon Substituted Isoquinolines via Cobalt-Catalyzed CH/NO Bond Activation by Muralirajan, Krishnamoorthy, Kuppusamy, Ramajayam, Prakash, Sekar, Cheng, Chien-Hong

“…A green atom‐economical method for the synthesis of highly functionalized 1‐amino and 1‐carbon substituted isoquinolines from the reaction of…”
Get full text

Triarylamine‐Pyridine‐Carbonitriles for Organic Light‐Emitting Devices with EQE Nearly 40 by Chen, Yi‐Kuan, Jayakumar, Jayachandran, Hsieh, Chia‐Min, Wu, Tien‐Lin, Liao, Chun‐Cheng, Pandidurai, Jayabalan, Ko, Chang‐Lun, Hung, Wen‐Yi, Cheng, Chien‐Hong

“…Highly efficient thermally activated delayed fluorescence (TADF) molecules are in urgent demand for solid‐state lighting and full‐color displays. Here, the…”
Get full text

Advancements in the Synthesis and Applications of Cationic N-Heterocycles through Transition Metal-Catalyzed C−H Activation by Gandeepan, Parthasarathy, Cheng, Chien-Hong

“…Cationic N‐heterocycles are an important class of organic compounds largely present in natural and bioactive molecules. They are widely used as fluorescent…”
Get full text

Diboron compound-based organic light-emitting diodes with high efficiency and reduced efficiency roll-off by Wu, Tien-Lin, Huang, Min-Jie, Lin, Chih-Chun, Huang, Pei-Yun, Chou, Tsu-Yu, Chen-Cheng, Ren-Wu, Lin, Hao-Wu, Liu, Rai-Shung, Cheng, Chien-Hong

“…Organic light-emitting diodes (OLEDs) based on thermally activated delayed fluorescence (TADF) materials are promising for the realization of highly efficient…”
Get full text

A New Molecular Design Based on Thermally Activated Delayed Fluorescence for Highly Efficient Organic Light Emitting Diodes by Rajamalli, Pachaiyappan, Senthilkumar, Natarajan, Gandeepan, Parthasarathy, Huang, Pei-Yun, Huang, Min-Jie, Ren-Wu, Chen-Zheng, Yang, Chi-Yu, Chiu, Ming-Jui, Chu, Li-Kang, Lin, Hao-Wu, Cheng, Chien-Hong

“…Two benzoylpyridine-carbazole based fluorescence materials DCBPy and DTCBPy, bearing two carbazolyl and 4-(t-butyl)­carbazolyl groups, respectively, at the…”
Get full text

Fickle Reactivity of Allenes in Transition‐Metal‐Catalyzed C−H Functionalizations by Santhoshkumar, Rajagopal, Cheng, Chien‐Hong

“…Transition‐metal‐catalyzed C−H functionalizations with allenes lead to unique selectivity challenges due to the presence of two adjacent carbon–carbon double…”
Get full text

Allylic Carbon–Carbon Double Bond Directed Pd-Catalyzed Oxidative ortho-Olefination of Arenes by Gandeepan, Parthasarathy, Cheng, Chien-Hong

“…Pd-catalyzed selective ortho-olefination of arenes assisted by an allylic C–C double bond at room temperature using O2 as a terminal oxidant is described. A…”
Get full text

Cobalt(III)-Catalyzed [5 + 1] Annulation for 2H‑Chromenes Synthesis via Vinylic C–H Activation and Intramolecular Nucleophilic Addition by Kuppusamy, Ramajayam, Muralirajan, Krishnamoorthy, Cheng, Chien-Hong

“…A new cobalt-catalyzed phenolic OH-assisted C–H functionalization of 2-vinylphenols with allenes to give various 2H-chromenes is described. It is the first…”
Get full text

Cobalt‐Catalyzed Mild Ring‐Opening Addition of Arenes C−H Bond to 7‐Oxabicyclic Alkenes by Muralirajan, Krishnamoorthy, Prakash, Sekar, Cheng, Chien‐Hong

“…A mild approach for a Cp*Co(III)‐catalyzed C−H naphthylation of arenes by 7‐oxabicyclic alkenes has been developed. In some cases, intermediate products with a…”
Get full text