Triallyl phosphites

In the removal of protecting groups used in the phosphonyl-ation of nucleosides, catalytic hydrogenolysis is usually employed. Thus, 5 -deoxynucleoside-5 -phosphonates have been synthesized by an Arbusov reaction between triallyl phosphite and 5 -deoxy-5 -iodonucleosides to give the corresponding diallyl ester from which the allyl groups were removed by hydrogenolysis [40] (Fig. 6.18). 

Triallyl phosphate, 3184 Trimethyl phosphate, 1318 Trimethyl phosphite, 1315 Trimethyl thiophosphate, 1316... 

Ethylene dimethacrylate-methyl methacrylate Ethylene dimethacrylate 1,3-Butylene dimethacrylate Acrylonitrile a-Chloroacrylonitrile Vinyl acetate Styrene Vinyltoluene Divinylbenzene A -Vinyl-2-pyrrolidone 4-Vinylpyridine Diallyl phosphite Triallyl phosphate Butenediol... 

A direct comparison of the additive behavior of neutral phosphates and phosphites in the four-ball test under relatively mild conditions is reported in the work of Goldblatt and Appeldoorn [43]. The data shown in Table 11-15 are their findings for 3% of the additive dissolved in a heavy white oil and run in the four-ball machine for 15 minutes at 1200 rpm. In wet air all the phosphates show about the same wear im.provement under a 10 kg load over wear with the base oil in dry argon there is no significant improvement. Tributyl phosphite functions consistently poorer in the wear test than either triallyl or triphenyl phosphite, whose behavior is not significantly different from that of the corresponding phosphates. All the additives improve the performance of the... 

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