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. Author manuscript; available in PMC: 2016 Apr 29.
Published in final edited form as: J Am Chem Soc. 2015 Apr 21;137(16):5292–5295. doi: 10.1021/jacs.5b01899

Figure 2.

Figure 2

In situ 31P NMR spectra for the reaction shown in eq 5. (A) Initial spectrum of phosphetanium 12. (B) Spectrum recorded at −70 °C immediately following addition of LiAlH4 showing formation of 17. (C) Spectrum recorded after warming reaction to −30 °C showing formation of 10. Units are ppm relative to 85% H3PO4 external standard.