Developing new efficient catalytic systems to convert abundant and renewable feedstocks into valuable products in a compact, flexible, and target-specific manner is of high importance in modern synthetic chemistry. Here, we describe a versatile set of mild catalytic conditions utilizing a single gold-based solid catalyst that enables the direct and additive-free preparation of four distinct and...

A sodium salt of 2-(fur-2-yl)-6-nitro-1,2,4-triazolo[1,5-a]pyrimidin-7-one as a close structural analogue ZM-241385 was obtained. This heterocycle can serve an effector for A2a adenosine receptors and possesses antiseptic activity. The structures compounds were confirmed based on the data 1H, 13C NMR spectroscopy, IR elemental analysis. structure 2-furyl-6-nitro-1,2,4-triazolo[1,5-a]pyrimidin-7...

Several cycline dependent kinase 2 (CDK2) inhibitors with different chemical structures have been introduced. The hinge region of CDK2 (residues 81–84) contains a set of hydrogen bond donor and acceptor sites some of which must be satisfied for potent inhibitor binding. The benzimidazolone skeleton may provide such interactions. Accordingly, 3-sulfonamide substituted benzamido-benzimidazolones ...

We present the first report of biotransformation 3-nitro-1,2,4-triazol-5-one (NTO) and 2,4-dinitroanisole (DNAN), replacements for explosives 1,3,5-trinitro-1,3,5-triazine (RDX) 2,4,6-trinitrotoluene (TNT), respectively, by methane-oxidizing cultures under aerobic conditions. Two consortia, dominated Methylosinus spp., degraded both compounds with transient production reduced NTO products, non-...

The hydration numbers of typical aprotic polar substances bearing dipole moments larger than 3 D, such as nitro compounds and nitriles, were precisely determined in aqueous solution using high frequency dielectric relaxation techniques up to a frequency of 50 GHz at 25 °C. The hydration number is one of the most quantitative parameters for determining the hydrophilicity or hydrophobicity of a c...

3 Starting from 2-methyl-4-nitro-imidazole, new 5-(2-methyl- 4-nitro-1-imidazomethyl)-1,3,4-oxadiazole-2-thione () was synthesized and was subjected to Mannich reaction with appropriate amines to yield a new series of 3-substituted aminomethyl-5-(2-methyl-4-nitro-1-imidazomethyl)- 1,3,4-oxadiazole-2-thiones (4a-j). The structure of the title compounds was elucidated by elemental analysis and sp...

From the time immemorial, sodium borohydride has been used for the reagent of choice for reducing various carbonyl compounds and acid chlorides in protic solvents. Over the past decades the utility of sodium borohydride has been greatly expanded and various modifications have been developed. Reductive dechlorination of aromatic halo nitro compounds have a great significance in the field of orga...

An efficient one-pot reductive acetylation of aromatic nitro compounds is developed without isolating the intermediate amine. The nitro compound is efficiently reduced by sodium borohydride and catalytic amount of Pd-C in MeOH-water media in presence / absence of alkali, and the amine thus generated is acetylated by acetic anhydride in situ in excellent yields through easy work-up. The techniqu...

Site-directed mutagenesis based on the crystal structure of AurF, a nitro group forming monooxygenase from Streptomyces thioluteus, revealed that AurF variants are capable of selectively transforming guanidyl- and amidinyl-substituted anilines into the corresponding nitro compounds. Our results provide new insights into the biochemical basis of regioselective N-oxygenation.