27845-50-7Relevant articles and documents
Non-nanogold catalyzed aerobic oxidation of secondary amines to imines
Zhu, Bolin,Angelici, Robert J.
, p. 2157 - 2159 (2007)
Bulk gold powder (～103 nm particle size) is a highly active catalyst for the oxidative dehydrogenation of secondary amines to imines under the mild conditions of 1 atm O2 and 60-100°C. The Royal Society of Chemistry.
Precise incorporation of transition metals into organolead oxyhalide crystalline materials for photocatalysis
Fang, Lei,Fei, Honghan,Ma, Wen,Song, Xueling,Sun, Chen,Zhang, Lu
, p. 11360 - 11364 (2021)
Organolead halide crystalline materials are an emerging class of high-performance photocatalysts. However, limited studies have been performed to tune their photoactive properties by precise introduction of transition metals. Herein, we report the success
Metal-Free Organocatalytic Oxidative Ugi Reaction Promoted by Hypervalent Iodine
Singh, Karandeep,Kaur, Amanpreet,Mithu, Venus Singh,Sharma, Siddharth
, p. 5285 - 5293 (2017)
We report here a novel IBX-promoted oxidative coupling of primary amines and its utilization to Ugi reaction. Advantageously, the reaction could be carried out in choline chloride urea as a natural deep eutectic solvent. A range of imines and bisamides fr
Covalent Organic Frameworks toward Diverse Photocatalytic Aerobic Oxidations
Liu, Shuyang,Tian, Miao,Bu, Xiubin,Tian, Hua,Yang, Xiaobo
supporting information, p. 7738 - 7744 (2021/05/07)
Photoactive two-dimensional covalent organic frameworks (2D-COFs) have become promising heterogenous photocatalysts in visible-light-driven organic transformations. Herein, a visible-light-driven selective aerobic oxidation of various small organic molecules by using 2D-COFs as the photocatalyst was developed. In this protocol, due to the remarkable photocatalytic capability of hydrazone-based 2D-COF-1 on molecular oxygen activation, a wide range of amides, quinolones, heterocyclic compounds, and sulfoxides were obtained with high efficiency and excellent functional group tolerance under very mild reaction conditions. Furthermore, benefiting from the inherent advantage of heterogenous photocatalysis, prominent sustainability and easy photocatalyst recyclability, a drug molecule (modafinil) and an oxidized mustard gas simulant (2-chloroethyl ethyl sulfoxide) were selectively and easily obtained in scale-up reactions. Mechanistic investigations were conducted using radical quenching experiments and in situ ESR spectroscopy, all corroborating the proposed role of 2D-COF-1 in photocatalytic cycle.
Synthesis of chromeno[3,4-b]piperazines by an enol-ugi/reduction/cyclization sequence
Bornadiego, Ana,Neo, Ana G.,Marcos, Carlos F.
supporting information, (2021/05/31)
Keto piperazines and aminocoumarins are privileged building blocks for the construction of geometrically constrained peptides and therefore valuable structures in drug discovery. Combining these two heterocycles provides unique rigid polycyclic peptidomimetics with drug-like properties including many points of diversity that could be modulated to interact with different biological receptors. This work describes an efficient multicomponent approach to condensed chromenopiperazines based on the novel enol-Ugi reaction. Importantly, this strategy involves the first reported post-condensation transformation of an enol-Ugi adduct.
