نتایج جستجو برای: triphenylphosphine
تعداد نتایج: 925 فیلتر نتایج به سال:
Described herein is the development of a continuous flow, solid-phase triphenylphosphine (PS-PPh3) assisted protocol to facilitate in situ coupling reciprocal pairs halogen and carbonyl functionalised molecular by Wittig olefination within 15 mins. The entails injecting single solution (1 : 1 CHCl3 EtOH) containing halogenated carbonyl-based substrates into continuously flowing stream EtOH 1), ...
A nitrosamine photooxidation reaction is shown to generate a peroxy intermediate by experimental physical-organic methods. The irradiation of phenyl and methyl-substituted nitrosamines in the presence of isotopically labeled 18-oxygen revealed that an O atom was trapped from a peroxy intermediate to trimethylphosphite or triphenylphosphine, or by nitrosamine itself, forming two moles of nitrami...
Tris(triphenylphosphine)gold(I) chloride was found to form a crystalline phase with two molecules of dichloromethane. In the crystal the chlorine atom is almost fully dissociated from the [(Ph3P)3Au] cation. The gold atom shows only a minor displacement from the plane of the phosphorus atoms (sum of the angles P-Au-P 355.35!; d(Au-Cl) 2.7962(6) Å), very similar to the geometry of the solvent-fr...
BACKGROUND 1,1-Difluoroalkenes cannot only be used as valuable precursors for organic synthesis, but also act as bioisosteres for enzyme inhibitors. Among various methods for their preparation, the carbonyl olefination with difluoromethylene phosphonium ylide represents one of the most straightforward methods. RESULTS The combination of (chlorodifluoromethyl)trimethylsilane (TMSCF2Cl) and tri...
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