41859-57-8Relevant articles and documents
Amide Bond Formation via the Rearrangement of Nitrile Imines Derived from N-2-Nitrophenyl Hydrazonyl Bromides
Boyle, Mhairi,Livingstone, Keith,Henry, Martyn C.,Elwood, Jessica M. L.,Lopez-Fernandez, J. Daniel,Jamieson, Craig
supporting information, p. 334 - 338 (2022/01/20)
We report how the rearrangement of highly reactive nitrile imines derived from N-2-nitrophenyl hydrazonyl bromides can be harnessed for the facile construction of amide bonds. This amidation reaction was found to be widely applicable to the synthesis of primary, secondary, and tertiary amides and was used as the key step in the synthesis of the lipid-lowering agent bezafibrate. The orthogonality and functional group tolerance of this approach was exemplified by the N-acylation of unprotected amino acids.
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).
Design and Scalable Synthesis of N-Alkylhydroxylamine Reagents for the Direct Iron-Catalyzed Installation of Medicinally Relevant Amines**
Delcaillau, Tristan,Falk, Eric,Gürtler, Laura,Makai, Szabolcs,Morandi, Bill
supporting information, p. 21064 - 21071 (2020/09/21)
Secondary and tertiary alkylamines are privileged substance classes that are often found in pharmaceuticals and other biologically active small molecules. Herein, we report their direct synthesis from alkenes through an aminative difunctionalization reaction enabled by iron catalysis. A family of ten novel hydroxylamine-derived aminating reagents were designed for the installation of several medicinally relevant amine groups, such as methylamine, morpholine and piperazine, through the aminochlorination of alkenes. The method has excellent functional group tolerance and a broad scope of alkenes was converted to the corresponding products, including several drug-like molecules. Besides aminochlorination, the installation of other functionalities through aminoazidation, aminohydroxylation and even intramolecular carboamination reactions, was demonstrated, further highlighting the broad potential of these new reagents for the discovery of novel amination reactions.
