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Diphenylphosphine oxide
| Product name | Diphenylphosphine oxide |
| Specification | ≥99% |
| Net weight | 25kg/drum |
| CAS No. | 4559-70-0 |
| Molecular formula | C12H11OP |
| Molecular weight | 202.1804 |
| Physical properties | Melting point: 56～57℃(lit.) Boiling point: 377℃ Flash point: 153℃ Refractive index: 1.608-1.61 Form: Crystal color: White Water solubility: slightly soluble in water Sensitivity: highly hygroscopic |
| Storage method | Keep away from light, ventilated and dry place, sealed and stored |
| Use | Diphenylphosphine oxide [Ph2P(O)H] is commonly used in the preparation of triphenylphosphine oxide, alkenyldiphenylphosphine oxide, addition to alkynes and Wittig-Horner reagents. Synthesis of diphenylphosphine derivatives Ph2P(O)H is coupled with aryl trifluoromethanesulfonate, and phosphine oxide is reduced to obtain diphenylarylphosphine, which is a commonly used chiral ligand. Ph2P(O)H reacts with TMSCl to give trimethylsiloxydiphenylphosphine, which reacts with haloalkene to give alkenyldiphenylphosphine oxide (Formula 2)[4]. Addition to alkynes Metal-catalyzed addition of diphenylphosphine oxide to alkynes yields highly stereospecific alkene compounds (Formula 3)[5,6]. Addition to olefins Under microwave conditions, diphenylphosphine oxide can undergo an addition reaction with olefins without any solvent and catalyst (Formula 4)[7]. Reaction with difluorochloromethane The reaction of Ph2P(O)H with difluorodichloromethane can prepare difluoromethyldiphenylphosphine oxide, which is further reacted with aldehydes or ketones to form 1,1-difluoroalkenes. |
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