phosphorus pentoxide
1.The results of NH_3-TPD and IR showed that phosphorus pentoxide reacted with both Br?o??nsted acid sites and terminal SiOH groups.
2.Aldisin(6,7-dihydropyrroloazepine-4,8(1H,5H)-dione)and its derivatives,4-bromoaldisin and 4,5-dibromoaldisin,were synthesized by cyclization of 3-[(pyrrole-2-carbonyl)amino] propionic acid under reflux using phosphorus pentoxide in methane-sulfonic acid as the cyclization regent. Their structures were characterized by(~1HNMR),(~(13)CNMR),FABMS and IR spectra.
