نتایج جستجو برای: 13 diaryl h benzofchromene
تعداد نتایج: 828046 فیلتر نتایج به سال:
A multistep synthesis was developed to prepare new 1,2,3-triazole-amino acid conjugates (6 and 7). These compounds contain the diaryl ether moiety were synthesized via SNAr reaction under mild condition in good yield. Their structures confirmed by spectroscopic analyses (HR-MS, NMR, IR). showed significant antiproliferative activity (>30%) toward breast MCF7 liver HepG2 cancer cells lines at...
A novel rhodium-catalyzed linear codimerization of alkyl phenyl ketenes with internal alkynes to dienones and a novel synthesis of furans by an unusual cycloaddition of diaryl ketenes with internal alkynes have been developed. These reactions proceed smoothly with the same rhodium catalyst, RhCl(PPh(3))(3), and are highly dependent on the structure and reactivity of the starting ketenes.
A highly efficient and stereoselective arylation of in situ-generated azavinyl carbenes affording 2,2-diaryl enamines at ambient temperatures has been developed. These transition-metal carbenes are directly produced from readily available and stable 1-sulfonyl-1,2,3-triazoles in the presence of a rhodium carboxylate catalyst. In several cases, the enamines generated in this reaction can be cycl...
Silver-catalyzed carbonphosphonation of α,α-diaryl allylic alcohols is achieved. A series of γ-ketophosphonates with different substituents were readily obtained. The mechanistic study indicated that the reaction was initiated by the addition of P-radicals, which sequentially undergo 1,2-migration of an aryl group to form C(Ar)-C(sp(3)) bonds.
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