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Relevant academic research and scientific papers

Manganese Catalyzed Direct Amidation of Esters with Amines

The transition metal catalyzed amide bond forming reaction of esters with amines has been developed as an advanced approach for overcoming the shortcomings of traditional methods. The broad scope of substrates in transition metal catalyzed amidations remains a challenge. Here, a manganese(I)-catalyzed method for the direct synthesis of amides from a various number of esters and amines is reported with unprecedented substrate scope using a low catalyst loading. A wide range of aromatic, aliphatic, and heterocyclic esters, even in fatty acid esters, reacted with a diverse range of primary aryl amines, primary alkyl amines, and secondary alkyl amines to form amides. It is noteworthy that this approach provides the first example of the transition metal catalyzed amide bond forming reaction from fatty acid esters and amines. The acid-base mechanism for the manganese(I)-catalyzed direct amidation of esters with amines was elucidated by DFT calculations.

CHEMICAL UNCOUPLERS OF RESPIRATION AND METHODS OF USE THEREOF

Uncoupling of respiration is a well-recognized process that increases respiration and heat production in cells. Provided herein are chemical uncouplers of respiration that are compounds of Formula (I). Also provided are methods for preventing or treating metabolic disorders and modulating metabolic processes using compound of Formula (I).

Discovery of Hydrolysis-Resistant Isoindoline N -Acyl Amino Acid Analogues that Stimulate Mitochondrial Respiration

N-Acyl amino acids directly bind mitochondria and function as endogenous uncouplers of UCP1-independent respiration. We found that administration of N-acyl amino acids to mice improves glucose homeostasis and increases energy expenditure, indicating that this pathway might be useful for treating obesity and associated disorders. We report the full account of the synthesis and mitochondrial uncoupling bioactivity of lipidated N-acyl amino acids and their unnatural analogues. Unsaturated fatty acid chains of medium length and neutral amino acid head groups are required for optimal uncoupling activity on mammalian cells. A class of unnatural N-acyl amino acid analogues, characterized by isoindoline-1-carboxylate head groups (37), were resistant to enzymatic degradation by PM20D1 and maintained uncoupling bioactivity in cells and in mice.

Synthesis and biological evaluation of macamides derivatives as potent inhibitors of breast cancer cell MCF-7

A series of macamides (1-4) and their synthetic analogs (5-14) were synthesized and evaluated for in vitro inhibitory activities against breast cancer cell MCF-7. The results of bioactive assay showed that two of the macamides (compound 1 and 4) and one synthetic analog (compound 5) displayed comparable inhibitory activities against MCF-7 cell line, with IC50 values of 29.6, 36.2 and 27.2 μM, respectively.

Synthesis of fatty acid amides of catechol metabolites that exhibit antiobesity properties

A series of fatty acid amides of 3,4-methylenedioxymethamphetamine (MDMA) catechol metabolites were synthesized in order to evaluate their biological activities. Upon administration, all synthesized compounds resulted in negative modulation of food intake in rats. The most active compounds have affinity for the CB1 receptor and/or PPAR-α; part of their biological activity may be caused by these double interactions.

CHEMICAL COMPOSITION OF THE FRONTAL GLAND SECRETIONS FROM NEO-GUINEAN NASUTE TERMITE SOLDIERS.

The chemical composition of the frontal gland secretion of four Neo-Guinean nasute termite soldiers has been studied.Seventeen diterpenes have been isolated and identified.Some of them have been reported before from other Nasutitermitinae (4, 5, 6, 7, 17,