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31P NMR spectra for the synthesis of RCOOR1 (benzyl benzoate). I: TPPO (1 equiv), (COCl)2 (1.3 equiv), CH3CN (5 ml). II: after addition of RCOOH (benzoic acid, 1 equiv). III: R1OH (benzyl alcohol, 1.3 equiv) with Et3N (1 equiv) were added to solution II.
