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| Number | Title | Issue Date |
| 4885394 | Process for the preparation of tertiary phosphine oxides The invention relates to a process for the preparation of tertiary phosphine oxides by reacting primary or secondary phosphines with dimethyl carbonate under elevated pressure at elevated temperature.... | 12/05/1989 |
| 4806691 | Process for the preparation of tertiary phosphine oxides Tertiary phosphine oxides are prepared by oxidation of tertiary phosphine sulfides using H2 O2 in a solvent comprising about 2-20% by weight of optionally halogenated lower aliphatic carboxylic acids and the remainder of mono- or pol... | 02/21/1989 |
| 4745224 | Methods for making tertiary phosphine oxides Methods for making tertiary phosphine oxides from the corresponding tertiary phosphine sulfides by reacting the latter with sulfuric acid and/or organic sulfonic acids at temperatures from 70° C. to 200° C.... | 05/17/1988 |
| 4705894 | Process for recovery of organic acids from aqueous solutions A mixture of trialkyl phosphine oxides (HTRPO) was prepared having the formula: ##STR1## wherein R1, R2 and R3 are same or different alkyl groups of 5 to 9 carbon atoms and the total number of carbon atoms and the tot... | 11/10/1987 |
| 4675446 | Process for the preparation of tertiary phosphine oxides Tertiary phosphine oxides are prepared by the oxidation of tertiary phosphine sulfides with H2 O2 in a solvent composed of at least about 20% by weight, preferably at least about 50% by weight, of optionally halogenated, lower alipha... | 06/23/1987 |
| 4618719 | Addition of phosphines to alpha-olefins There is disclosed an improved process for the addition of phospines to alpha-olefins at high yields and conversions. The process involves the absence of a catalyst whose residues could interfere with the utility of the product, such as n-hexyldiphenylpho... | 10/21/1986 |
| 4605780 | Reactivation of rhodium complex hydroformylation catalysts Process for removing alkyl substituted phosphine from a hydroformylation medium and enhancing the rhodium complex catalyst contained therein via an oxygenation treatment.... | 08/12/1986 |
| 4581416 | Process for the synthesis of tertiary phosphine oxides and sulfides, and new tertiary phosphine oxides and sulfides The invention relates to processes for the synthesis of tertiary phosphine oxides and sulfides. The process according to the invention consists, in a first step, of reacting a secondary phosphine oxide or sulfide with an optionally activated alkali metal ... | 04/08/1986 |
| 4511738 | Process for preparing phosphine oxides A phosphine sulfide derivative is chlorinated and hydrolyzed with little pollution problem to give the corresponding phosphine oxide derivative.... | 04/16/1985 |
| 4447584 | Process for the synthesis of tertiary phosphine oxides and sulphides, and new tertiary phosphine oxides and sulphides The invention relates to processes for the synthesis of tertiary phosphine oxides and sulphides. The process according to the invention consists, in a first step, of reacting a secondary phosphine oxide or sulfide with an optionally activated alkali metal... | 05/08/1984 |
| 4371509 | Oxidizing phosphorus compounds with chlorosulfonic acid The invention relates to a process for oxidizing organic phosphorus compounds of the general formula (I) in which R stands for an organic radical, X stands for halogen and n stands for 0, 1, 2 or 3, to obtain compounds of the general formula (II) in which R, X... | 02/01/1983 |
| 4365094 | Process for the synthesis of tertiary phosphine oxides, and new tertiary phosphine oxides The invention relates to the synthesis of tertiary phosphine oxides and also to certain tertiary phosphine oxides. According to the invention, an organic phase containing a halogenomethyl derivative, a secondary phosphine oxide and a phase transfer catalyst in... | 12/21/1982 |
| 4346236 | Method of oxidizing tertiary-alkyl phosphines Tertiary-alkyl phosphines, such as tris-(3-hydroxypropyl) phosphine may be oxidized by heating in the presence of water and between about 0.1 and about 10% by weight of an acid catalyst at a temperature above about 100° C.... | 08/24/1982 |
| 4317887 | Metal complexing polymers Novel polyfunctional compounds and polymers are disclosed of the general formula ##STR1## wherein Q designates -X' or -X-&3xb5;-R; where X' designates ##STR2## where is --OH, or --SH; ଲ is --OH, --SH, --NH2, --NO2 | 03/02/1982 |
| 4294989 | Methylcyclohexyl-O-anisylphosphine Process for the homogeneous catalytic hydrogenation of ଲ-substituted--acylamido-acrylic acids which yields, after hydrogenation, an optically active mixture. The process comprises the hydrogenation of ଲ-substituted--acylamido-acr... | 10/13/1981 |
| 4265827 | Catalytic asymmetric hydrogenation Process for the homogeneous catalytic hydrogenation of -substituted--acylamido-acrylic acids which yields, after hydrogenation, an optically active mixture. The process comprises the hydrogenation of ଲ-substituted-ଲ-acylamido-acr... | 05/05/1981 |
| 4261919 | Catalytic asymmetric hydrogenation Process for the homogeneous catalytic hydrogenation of ଲ-substituted--acylamido-acrylic acids which yields, after hydrogenation, an optically active mixture. The process comprises the hydrogenation of ଲ-substituted--acylamidoacry... | 04/14/1981 |
| 4124533 | Metal coordination complexes containing optically active phosphine or arsine ligands Process for the homogeneous catalytic hydrogenation of ଲ-substituted--acylamido-acrylic acids which yields, after hydrogenation, an optically active mixture. The process comprises the hydrogenation of ଲ-substituted--acylamido-acr... | 11/07/1978 |
| 4122123 | Production of quaternary phosphonium halides Production of quaternary phosphonium halides of the general formula: in which R1, R2, R3 and R4 stand for identical or different alkyl groups having from 1 to 4 carbon atoms and X stands for halogen, especially for c... | 10/24/1978 |
| 4096189 | Production of tertiary phosphine oxides Production of tertiary phosphine oxides of the general formula in which R1, R2 and R3 each stand for identical or different, substituted or unsubstituted alkyl, aryl or aralkyl groups. The tertiary phosphine oxides are produced... | 06/20/1978 |
| 4070496 | Phosphine oxides having a physiological cooling effect Compounds and compositions are disclosed having a physiological cooling action on the skin. The compositions contain as the active ingredient certain phosphine oxides. The compositions disclosed include toilet and cosmetic preparations, e.g. toilet water,... | 01/24/1978 |
| 4061681 | Method for the preparation of mono- or poly [dialkyl or dicycloalkylphosphonylmethyl] aromatic carbocyclic compounds Mono- and poly [dialkyl or dicycloalkylphosphonylmethyl] aromatic carbocyclic compounds are prepared by reacting an appropriately substituted secondary phosphine with formaldehyde, reacting the resultant dialkyl or dicyclohydroxymethylphosphine with an ap... | 12/06/1977 |
| 4052463 | Process for preparing tertiary phosphine sulfides and oxides Tertiary phosphine sulfides and oxides are prepared by contacting elemental phosphorus with dialkyl sulfides, diaryl sulfides or dialkyl ethers in the presence of a catalyst under at least autogenous pressure at a temperature of from about 200° to about ... | 10/04/1977 |
| 4026709 | Color photographic recording material The present invention relates to new compounds having an active methylene group or phenolic hydroxyl group and therefore capable of being used as photographic color couplers. The new compounds contain at least one radical of a phosphoric acid diester, pho... | 05/31/1977 |
| 4020110 | Production of tertiary methylphosphine oxides Production of tertiary methylphosphine oxides of the general formula ##STR1## in which R and R' each stand for identical or different, branched or unbranched, substituted or unsubstituted alkyl, cycloalkyl, aralkyl or aryl groups having from 1 to 18 ... | 04/26/1977 |
| 4016156 | Distyryl compounds New distyryl compounds of the formula ##STR1## WHEREIN Rx denotes an optionally modified sulphonic acid group, a sulphone group, an optionally functionally modified carboxylic acid group or the nitrile group, Rx ' denotes an opt... | 04/05/1977 |
| 3997611 | Production of tertiary phosphine oxides Production of tertiary phosphine oxides of the general formula (I): ##STR1## in which the substituents R1 and R2, being identical or different, each stand for an alkyl, alkenyl, alkinyl, cycloalkyl, aralkyl or aryl radical havin... | 12/14/1976 |
| 3987009 | Transition metal catalyst compositions A catalyst composition consisting essentially of a non-linear polymer consisting essentially of a recurring unit having the following structural formula: wherein R1 is an unsubstituted or substituted straight or branched chain divalent saturate... | 10/19/1976 |
| 3980711 | Production of methylphosphine oxides Methylphosphine oxides of the general formula (I) ##EQU1## are produced from hydroxymethylphosphines of the general formula (II) ##EQU2## in which formulae R and R' each stand for identical or different alkyl-, cycloalkyl-, aralkyl- or aryl grou... | 09/14/1976 |
| 3972877 | Butadiene derivatives, process for their preparation and their use as optical brighteners 1,3-BUTADIENES CONTAINING AT LEAST ONE TERMINAL 2-BENZOFURANYL GROUP ARE OBTAINABLE BY HORNER syntheses. The products are optical brighteners.... | 08/03/1976 |
| 3960950 | Process for carbodiiomide synthesis Phosphine oxides are prepared from terpenes and are found to be valuable as catalysts in the condensation of isocyanates to yield carbodiimides.... | 06/01/1976 |
| 3932524 | Process for the preparation of phosphine oxides and sulphides A process for the preparation of phosphine oxides or sulphides of the formula: ##EQU1## in which R is a linear or branched aliphatic radical containing 5-12 carbon atoms, aralkyl radical selected from the group consisting of lower alkyl of 2-3 ... | 01/13/1976 |
| 3931333 | Production of halogen-containing tertiary phosphine oxides Production of halogen-containing tertiary phosphine oxides of the general formula I ##EQU1## in which the substituents R.sub.1, R.sub.2 and R.sub.3, being identical or different, stand for an alkyl, alkenyl, aryl or aralkyl radical, at least one... | 01/06/1976 |
