Tetraphenyl pyrophosphate

The same pyrophosphate5 can be prepared in high yield from dibenzyl hydrogen phosphate by reaction for a short time with tetraphenyl pyrophosphate at room temperature in an-... 

If 8-mercaptoadenosine-2, 3/-cyclic phosphate is treated with a phosphateactivating agent, e.g. diphenyl phosphorochloridate or tetraphenyl pyrophosphate, an oligomer is formed in which each phosphate is esterified by the 2 - and 3 -hydroxy-groups of one nucleoside residue and the 5 -hydroxy-group of the next. On... 

What we consider as the first unequivocal evidence for such an insertion reaction has now been demonstrated by D. A. Bright and A. M. Aaronson (24). Under carefully controlled conditions, they added ethylene oxide to tetraphenyl pyrophosphate to form and to identify as the sole reaction product ethylene glycol bis (diphenyl phosphate). This is illustrated in Fig. 8. The reaction proceeds at 70 °C when ethylene oxide is added to molten... 

A similar reaction of tetraphenyl pyrophosphate with propylene oxide leads to an 80% yield of the corresponding insertion product, as an oily liquid. The reaction time was six hours at 70 °C. purity, 96.7% by HPLC. Magnesium chloride and stannous octoate were also shown to be effective catalysts for this insertion reaction. 

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