Base-mediated isocyanide-based three-component reactions: divergent synthesis of spiro-substituted furans and pyrroles
作者:Hai-Ying Wang、Ming Bao、Bo Jiang、Liang Li
DOI:10.1039/c5ra25408f
日期:——
A facile base-mediated isocyanide-based three-component cycloaddition protocol for chemoselective formation of functionalized spiro-substituted furans and pyrroles derivatives has been developed. Fairly good yields of the products, the ready availability of the starting materials and the excellent chemoselectivity are the main advantages of this method.
Organophosphorus Chemistry. XV. The Reaction of 10-Dicyanomethylene-9(10<i>H</i>)-phenanthrenone with Alkyl Phosphites
作者:Wafaa M. Abdou、Neven A. F. Ganoub、Mohamed R. Mahran
DOI:10.1246/bcsj.64.747
日期:1991.2
The titled compound 5a reacts with trialkyl phosphites and dialkyl phosphonates to give, in each case, two conformers (A+B) of the corresponding phosphonate 8 and 9. The yields of the two isomers were estimated on the basis of 31P NMR data. Besides, structures 8 and 9 were supported by analytical and spectroscopic measurements of the major isomer 8A and 9A. The rotational isomers were assigned in terms of the Newman projection and NMR data. Relative ratios were studied in the light of dynamic NMR spectroscopy.