نتایج جستجو برای: alkene
تعداد نتایج: 1831 فیلتر نتایج به سال:
Intermolecular [2+2+1] cycloaddition which incorporates an alkyne, an isocyanate, and an alkene into a γ-butyrolactam proceeds with nickel catalyst.
The reaction of hydrazones with iodine/base leads to diazo intermediates that can be trapped by an internal alkene or alkyne.
Catalytic reductive coupling processes have been developed in numerous contexts as a strategy for the regioand stereoselective installation of alkenes. The direct coupling of a polar p system with a relatively nonpolar p system is often a successful strategy for selectively accomplishing synthetically desirable heterocouplings while avoiding undesired homocoupling of either reagent. For example...
Brønsted acid sites in zeolites (H-FER, H-MFI, H-MOR) selectively hydrogenate alkenes in excess H2 at high temperatures (>700 K) and at rates proportional to alkene and H2 pressures. This kinetic behavior and the De Donder equations for non-equilibrium thermodynamics show that, even away from equilibrium, alkene hydrogenation and monomolecular alkane dehydrogenation occur on predominantly uncov...
We report the synthesis of cyclic cobaltocenium olefins (cationic cobaltocenophane or ansa-cobaltocenium). This is prepared by ring-closing metathesis (RCM) diallyl cobaltocenium, which isomerizes into two different dienes. The isomerization terminal alkene at higher temperature results in thermodynamically more stable internal alkene, supported computational calculation. RCM these isomers prod...
Antagonists of the Escherichia coli type-1 fimbrial adhesin FimH are recognized as attractive alternatives for antibiotic therapies and prophylaxes against acute and recurrent bacterial infections. In this study α-d-mannopyranosides O- or C-linked with an alkyl, alkene, alkyne, thioalkyl, amide, or sulfonamide were investigated to fit a hydrophobic substituent with up to two aryl groups within ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید