Synthesis of 4H-pyrans by O-cyclization of 1,5-diketones
Copyright policy ) A. F. Blinokhvatov; O. V. Markovtseva; M. N. Nikolaeva;
Synthesis of 4H-pyrans by O-cyclization of 1,5-diketones
Substituted 4H-pyrans were obtained in high preparative yields by the reaction of 1,5-diketones with acetic anhydride and boron trifluoride etherate in diethyl ether. It is assumed that the heterocyclization of 1,5-diketones includes a step involving the formation and transformations of an acyloxy carbonium ion.
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These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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