41859-58-9Relevant academic research and scientific papers
Excited-State Copper Catalysis for the Synthesis of Heterocycles
Banerjee, Arghya,Bazan-Bergamino, Emmanuel A.,Frederiks, Nicoline C.,Johnson, Christopher J.,Ngai, Ming-Yu,Sarkar, Satavisha,Shah, Jagrut A.
supporting information, (2021/12/09)
Heterocycles are one of the largest groups of organic moieties with significant medicinal, chemical, and industrial applications. Herein, we report the discovery and development of visible-light-induced, synergistic excited-state copper catalysis using a combination of Cu(IPr)I as a catalyst and rac-BINAP as a ligand, which produces more than 10 distinct classes of heterocycles. The reaction tolerates a broad array of functional groups and complex molecular scaffolds, including derivatives of peptides, natural products, and marketed drugs. Preliminary mechanistic investigation suggests in situ generations of [Cu(BINAP)2]+ and [Cu(IPr)2]+ catalysts that work cooperatively under visible-light irradiation to facilitate catalytic carbo-aroylation of unactivated alkenes, affording a wide range of useful heterocycles.
Bezafibrate scaffold derived hydrazide-hydrazones: Synthesis and antioxidant activities
Pallapati, Ramya Krishna,Gugulothu, Sailaja,Vanga, Umamaheswara Rao,Bollikolla, Hari Babu
, p. 2473 - 2482 (2020/09/09)
A NEW series of Bezafibrate derived hydrazide-hydrazone analogues were generated by using some five membered, fused heterocyclic and aromatic aldehydes. All the hydrazones were obtained in good yields from methanol at 60-80°C for 5-8 hours stirring. Moreover, the compounds were also screened for their anti-oxidant activity potentiality at four different concentrations using DPPH method. Among these compounds, compound 6k analogue of bezafibrate was found to be the most active at all the tested concentrations (≈ 40% inhibition at 25 μg/mL ) followed by 6j (4-hydroxy, 3-methoxy 5-bromo analogue ≈ 35% at 25 μg/mL) compared to standard ascorbic acid (49.6% at 25 μg/mL).
Catalytic Access to Functionalized Allylic gem-Difluorides via Fluorinative Meyer–Schuster-Like Rearrangement
An, Rui,Li, Huimin,Liao, Lihao,Wu, Jin-Ji,Xu, Yang,Zhao, Xiaodan
supporting information, p. 11010 - 11019 (2020/05/18)
An unprecedented approach for efficient synthesis of functionalized allylic gem-difluorides via catalytic fluorinative Meyer–Schuster-like rearrangement is disclosed. This transformation proceeded with readily accessible propargylic fluorides, and low-cost B–F reagents and electrophilic reagents by sulfide catalysis. A series of iodinated, brominated, and trifluoromethylthiolated allylic gem-difluorides that were difficult to access by other methods were facilely produced with a wide range of functional groups. Importantly, the obtained iodinated products could be incorporated into different drugs and natural products, and could be expediently converted into many other valuable gem-difluoroalkyl molecules as well. Mechanistic studies revealed that this reaction went through a regioselective fluorination of alkynes followed by a formal 1,3-fluorine migration under the assistance of the B–F reagents to give the desired products.
