Three coumarin derivatives, viz. 6-methyl-N-(3-methyl-phen-yl)-2-oxo-2H-chromene-3-carboxamide, C18H15NO3 (1), N-(3-meth-oxy-phen-yl)-6-methyl-2-oxo-2H-chromene-3-carboxamide, C18H15NO4 (2), and 6-meth-oxy-N-(3-meth-oxy-phen-yl)-2-oxo-2H-chromene-3-carboxamide, C18H15NO5 (3), were synthesized and structurally characterized. The mol-ecules display intra-molecular N-H⋯O and weak C-H⋯O hydrogen bo...

A straightforward one-pot route for the synthesis of a new 4-phenyl-1,2,5,6-tetraazafluoranthen-3(2H)-one is reported form direct hydrazinolysis triketo ester and hydrazine hydrate in ethanol. 4-Phenyl-1,2,5,6-tetraazafluoranthen-3(2H)-one was subjected to aza-Michael addition N-alkylation on reaction with set alkylating agents presence K2CO3. Hydrazinolysis hydrazide conversion thiosemicarbazi...

Asymmetric allylic alkylation is a powerful reaction that allows the enantioselective formation of C-C bonds. Here we describe the asymmetric alkylation of alkylzirconium species to racemic 3,6-dihydro-2H-pyrans. Two systems were examined: 3-chloro-3,6-dihydro-2H-pyran using linear optimization (45-93% ee, up to 33% yield, 5 examples) and 3,6-dihydro-2H-pyran-3-yl diethyl phosphate with the ass...

In the title compound, C(24)H(26)O(5), the 2H-chromene ring system is essentially planar, with a maximum deviation of 0.029 (2) Å from the best-fit mean plane incorporating both rings. The dihedral angle between the 2H-chromene ring system and the benzene ring is 21.00 (1)°. In the crystal, pairs of C-H⋯O hydrogen bonds generate an R(2) (2)(8) ring pattern. These contacts are bolstered by weake...

Structural characterization of gas-phase [M,C,2H]+ (M = Ta, Ir, Pt), formed by reacting laser ablation M+ with ethylene oxide (c-C2H4O) or methane under multiple collision conditions, is achieved using infrared multiple-photon dissociation (IR-MPD) spectroscopy the intracavity free-electron FELICE. After product formation, part distribution complexed Ar, allowing for simultaneous recording IR-M...

H-NMR (400 MHz, CDCl3): δ = 0.81 (t, J=6.4 Hz, 3H, H19), 1.12-1.48 (m, 24H, H5-H9; H12-H18), 1.49-1.62 (m, 2H, H4), 2.23 (t, J=7.5 Hz, 2H, H3), 2.83 (brs, 2H, H10-H11), 3.59 (s, 3H, H1) ppm. C-NMR (100 MHz, CDCl3): δ = 14.1 (C19, CH3), 22.7 (C18, CH2), 24.9 (C4, CH2), 26.6 (CH2), 26.6 (CH2), 27.8 (CH2), 27.8 (CH2), 29.0 (CH2), 29.2 (CH2), 29.2 (CH2), 29.3 (CH2), 29.5 (CH2), 29.6 (CH2), 31.9 (C1...

Changes in potassium (K) concentration in erythrocytes (RBC) were investigated during the early developing stage (1 and 2 weeks after) and the chronic established stage (12 to 16 weeks after the renal artery constriction) in two-kidney (group 2H) and one-kidney Goldblatt hypertension (group 1H) of the rabbit. In both group 2H and group 1H, blood pressure was already elevated significantly durin...

it has been hypothesized that the survival, development, fecundity and population of insects are affected significantly by high temperatures. the diamondback moth, plutella xylostell (l.) (lepidoptera: plutellidae), is a serious and economically important pest of cruciferous crops throughout the word. in this research, the adult longevity and fecundity of p. xylostella were studied in laborator...

Abstract Metallic conductive 1T phase molybdenum sulfide (MoS 2 ) has been identified as promising anode for sodium ion (Na + batteries, but its metastable feature makes it difficult to obtain and restacking during the charge/discharge processing result in part capacity reversibility. Herein, a synergetic effect of atomic‐interface engineering is employed constructing 2H‐MoS layers assembled on...