Pentaoxyphosphoranes from the Reaction of Trialkyl Phosphites with α-Ketoaldehydes and with Vicinal Triketones. Condensations of α-Ketoaldehydes with α-Diketones. P31 and H1 Nuclear Magnetic Resonance Spectra1
Pentaoxyphosphoranes from the Reaction of Trialkyl Phosphites with α-Ketoaldehydes and with Vicinal Triketones. Condensations of α-Ketoaldehydes with α-Diketones. P<sup>31</sup> and H<sup>1</sup> Nuclear Magnetic Resonance Spectra<sup>1</sup>