Abstract:
The present disclosure provides prodrug compounds of MDMA, MDA, and derivatives thereof having an improved pharmacokinetic profile suitable for the treatment of various neurological diseases.
Abstract:
The invention relates to a process for the preparation of bis(perfluoroalkyl)phosphinic acid anhydrides by reaction of a bis(perfluoroalkyl)phosphinic acid with phosphorus pentoxide, to novel bis(perfluoroalkyl)phosphinic acid anhydrides and to uses of bis(perfluoroalkyl)phosphinic acid anhydrides.
Abstract:
A method for producing monohydroxy-functionalized dialkylphosphinic acids, esters, and salts, characterized in that a) a phosphinic acid source (I) is reacted with olefins (IV) in the presence of a catalyst A to obtain an alkylphosphonous acid, the salt or ester (II) thereof, b) the obtained alkylphosphonous acid, the salt or ester (II) thereof is reacted with alkylene oxides of formula (V) in the presence of a catalyst B to obtain a monofunctionalized dialkylphosphinic acid derivative (III), catalyst A represents transition metals and/or transition metal compounds and/or catalyst systems composed of a transition metal and/or a transition metal compound and at least one ligand, and catalyst B is a Lewis acid.
Abstract:
A flame retarded thermoplastic polymer composition comprising a thermoplastic polymer and a metal salt of phosphinic acid possessing a desired degree of volatility.
Abstract:
Aluminum salts of phosphinic acid or diphosphinic acids having alkyl and/or aryl substitutes, obtainable by heating an ester of the corresponding phosphinic acids or diphosphinic acids with aluminum hydroxide at a temperature of more than 150° C. under pressure in the presence of water, are distinguished by a particular crystal structure and are suitable as flameproofing agents for plastics.
Abstract:
This invention relates to a method for producing aluminum phosphinates of the formula [R.sub.1 R.sub.2 P(O)O.sup.- ].sub.3 Al.sup.3 +, where R.sub.1 and R.sub.2 are the same or different and represent a C.sub.1-8 alkyl group or a phenyl group. The process involves reaction of the corresponding alkali metal phosphinate with aluminum sulfate. The aluminum phosphinate salts are useful as a flame retardant for plastics.
Abstract:
The invention relates to a process for preparing alkali metal salts and/or alkaline earth metal salts of alkylphosphonous acids and dialkylphosphinic acids from elemental yellow phosphorus and alkyl halides, which comprises carrying out the reaction in the presence of aqueous alkali metal hydroxide or alkaline earth metal hydroxide or mixtures thereof. The invention likewise relates to the use of the compounds prepared by the process according to the invention for preparing flame retardants, extraction media and plant protection agents.
Abstract:
The invention relates to a process for preparing dialkylphosphinate salts, which comprisesa) reacting elemental yellow phosphorus with alkyl halides in the presence of alkali metal hydroxide or alkaline earth metal hydroxide to form a mixture which comprises as main constituents the salts of alkylphosphonous, phosphorous and hypophosphorous acids,b) adjusting the mixture to a pH below 7 and then reacting the mixture with olefins in the presence of a free-radical initiator andc) reacting the dialkylphosphinic acids obtained according to b) and/or alkali metal salts thereof with metal compounds of Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na and/or K to give the metal dialkylphosphinate salts.The invention likewise relates to the use of the metal dialkylphosphinate salts prepared by the process according to the invention to prepare flame retardants.
Abstract:
Polyesters such as polyethylene terephthalate or polybutylene terephthalate are provided with a flame-retardant finish by addition of calcium salts or aluminum salts of phosphinic or diphosphinic acids.
Abstract:
Preparation of phosphonic and/or phosphinic acids by hydrolytic cleavage of phosphonic and/or phosphinic acid alkyl esters in the presence of the phosphonic and/or phosphinic acid by carrying out the hydrolysis at a temperature of from 160.degree. to 250.degree. C with the use of at least a stoichiometric amount of water, and by distilling off the alkanol formed, optionally together with water.