867-33-4

Usage

Synthesis Reference(s)

Tetrahedron Letters, 35, p. 4223, 1994 DOI: 10.1016/S0040-4039(00)73157-1

Upstream product

• 6830-45-1 tetra-n-propyldiphosphane disulfide 
• 927-77-5 n-propylmagnesium bromide 
• 2234-82-4 1-propylmagnesium chloride 
• 762-04-9 phosphonic acid diethyl ester 
• 22689-71-0 di-n-propyl dithiophosphinic acid 
• 54043-94-6 Tetrapropyldiphosphan-bis-trimethylsilylimid 
• 89599-85-9 Dipropylphosphortrichlorid 
• 56-23-5 tetrachloromethane 
• 27443-18-1 dipropylphosphine oxide 
• 107-08-4 1-iodo-propane 
• 81373-58-2 dipropylphosphinous iodide 
• 92587-59-2 C₆H₁₄IOP 
• 53483-29-7 trimethylsiloxydipropylphosphinate 
• 106-94-5 propyl bromide 

Relevant academic research and scientific papers

Preparation method of dialkylphosphinic acid

The invention discloses a preparation method of dialkylphosphinic acid, which comprises the following steps: adding phosphorous acid into a reaction kettle, adding a catalyst, and carrying out pyrolysis at 170-190 DEG C to generate hydrogen phosphide; introducing the obtained hydrogen phosphide into a reaction kettle containing olefin, conducting heating and pressurizing in the presence of an initiator, and conducting reacting to obtain dialkylphosphine; and adding the obtained dialkylphosphine into a solvent, adding hydrogen peroxide while stirring, and conducting reacting to obtain the dialkylphosphinic acid. According to the preparation method of the dialkylphosphinic acid, high-purity phosphide hydrogen raw material gas is prepared by pyrolyzing phosphorous acid, free radical additionreaction is conducted on the phosphide hydrogen raw material gas and various olefins to prepare high-purity, high-grade and high-added-value dialkylphosphine, and subsequent controllable oxidation isconducted by taking the dialkylphosphine as a raw material to obtain the dialkylphosphinic acid. Various types of dialkylphosphinic acids are prepared, the operation steps are simple, and the operation conditions are mild.

Synthesis of asymmetric P,P-dialkyl-P',P'-diphenylethylenediphosphine dioxides

Asymmetric P,P-dialkyl-P',P'-diphenylethylenediphosphine dioxides were synthesized by the addition of dialyklphosphinous acids to diphenylvinylphosphine oxide in toluene without a catalyst and in DMSO in the presence of concentrated aqueous alkali.The method for isolating dipropyl- and dibutylphosphinous acids obtained by reactions of diethylphosphite with the corresponding alkylmagnesium bromides was improved. - Key words: ethylenediphosphine dioxides; diphenylvinylphosphine oxide; dialkylphosphinous acids; PH-acids; PH-addition.

SYNTHESIS OF ACYCLIC AND CYLIC DIALKYLPHOSPHINIC ACIDS FROM AMMONIUM HYPOPHOSPHITE

The possibilities of synthesizing dialkylphosphinic and cyclic phosphinic acids from ammonium hypophosphite, hexamethyldisilazane, and corresponding halogen derivatives have been studied.These acids can be prepared in low yield, but the simplicity of the process compensates for this disadvantage.

Synthesis of alkyl phosphinic acids from silyl phosphonites and alkyl halides

Mono- and di-substituted phosphinic acids have been synthesised in a one-pot reaction, by the addition of alkyl halides to silyl phosphonites, under mild and flexible conditions.

INVESTIGATION OF THE REACTION BETWEEN DIALKYLPHOSPHINE OXIDES AND CARBONTETRACHLORIDE

The time dependent formation of intermediates and end products in the reaction between Et2P(O)H and CCl4 is analysed using (31)P-NMR technique.The various reaction steps are studied separately in order to elucidate the overall mechanism.A key step is the disproportionation of Et2P(O)H catalysed by Et2PCl and Et2P(O)Cl, in a cyclic process, the latter being produced initially by the reaction between Et2P(O)H and CCl4.The diethylphosphine formed during disproportionation reacts immediately with CCl4, driving the reaction through the intermediates, Et2PCl and Et2PCCl3which react with Et2P(O)OH producing Et2P(O)Cl, (Et2PO)2O, and Et2P(O)CHCl2, as end products.The influence of the substituents on rate and product yields was studied with n-propyl, n-butyl, n-octyl, and allyl as substituents in the dialkylphosphine oxide.