نتایج جستجو برای: αα bis substituted benzylidene cycloalkanones
تعداد نتایج: 86685 فیلتر نتایج به سال:
A new series of bimetallic complexes Co(II), Cd(II) and Hg(II) with Schiff base ligand (N,N',-Bis(Benzylidene)-1,3-Phenylenediamine, {BENDAMB (1,3)} have been synthesized characterized by elemental analysis, molar conductance, magnetic moment measurements, IR, Electronic 1H NMR spectral studies. The softness parameter TEn also calculated to derive the binding side thiocyanate ligand. data shows...
We have described the synthesis of novel biphenylethane-based wires for molecular electronics. Exceptional single-molecule diode behavior was predicted for unsymmetrically substituted biphenylethane derivatives, synthesized here using the so far unexplored unsymmetrically substituted 1,2-bis(4-bromophenyl)ethanes as key intermediates, which were obtained from the corresponding tolane precursor ...
3- and 4-Methylcyclohexanone have been isolated exclusively as their energetically disfavoured axial conformers in the host-guest complexes formed upon recrystallization of the novel optically pure host compound, (+)-(2R,3R)-1,1,4,4-tetraphenylbutane-1,2,3,4-tetraol (TETROL), from these cycloalkanones.
This study investigated prenatal diagnosis of α-thalassemia and β-thalassemia in 3049 families 18 regions Hainan Province. Molecular was performed couples with thalassemia Genomic DNA extracted from peripheral blood the villus, amniotic fluid, or cord fetuses. DNA-based using polymerase chain reaction. The most commonly detected mutation for was− SEA/αα (31.53%), followed by − α4.2/αα (11.15%) ...
The antiaromaticity of a series of dianions of p-substituted benzylidene dibenzo[a,d]cycloheptenes was examined through calculated measures of antiaromaticity. The nucleus-independent chemical shifts (NICS) and magnetic susceptibility exaltation both showed substantial antiaromatic character in the benzannulated tropylium anion. When the antiaromaticity was normalized for the area of the ring, ...
Tyrosinase is a key player in ultraviolet-induced melanogenesis. Because excessive melanin accumulation in the skin can induce hyperpigmentation, the development of tyrosinase inhibitors has attracted attention in cosmetic-related fields. However, side effects including toxicity and low selectivity have limited the use of many tyrosinase inhibitors in cosmetics. We synthesized 12 novel 2-(subst...
The combination of organolithium chemistry with gold catalysis has enabled the development a synthetic strategy for accessing polysubstituted indoles and carbazoles from readily available starting materials. This method is based on “back-to-front” approach ketopyrroles, generated by intramolecular carbolithiation N,N-bis-(2-lithioallyl)amines that evolve into 3,4-bis(lithiomethyl)dihydropyrrole...
Cobalt and nickel complexes of a new carborane-substituted bis(phosphanido) ligand have been prepared. Reaction the cobalt complex with white phosphorus (P 4 ) results in remarkable fragmentation P into 3 1 units.
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