Figure 1.
7Li NMR at −30 °C of 1 : 1 mixture of 7 and 9 with LiHMDS. Enolized separately and combined at −78 °C (Spectrum 1). Warming and recooling to −30 °C (Spectrum 2).
7Li NMR at −30 °C of 1 : 1 mixture of 7 and 9 with LiHMDS. Enolized separately and combined at −78 °C (Spectrum 1). Warming and recooling to −30 °C (Spectrum 2).