Spectroscopic Reaction Monitoring Techniques on the Resin

Since the aforementioned reactions were conducted on an insoluble support, conventional techniques such as TLC could not be used to monitor the 

Gel-phase C NMR spectra were also recorded on the polymer-supported material at each step in the reaction sequence. Again, the loss or gain of the trimethylsilyl resonance at 8 0.3—0.5 ppm was a diagnostic feature. 

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