Class / Patent application number | Description | Number of patent applications / Date published |
564012000 | Phosphorus attached directly to amino nitrogen by nonionic bonding | 15 |
20080221353 | Novel phosphonium salt ionic liquid and reaction solvent including the same - The present invention provides an ionic liquid including a quaternary phosphonium salt represented by general formula (1): | 09-11-2008 |
20100081842 | Trimerization - A new P—N—P ligand is useful in ethylene oligomerizations. In combination with i) a source of chromium and ii) an activator such as methylalumoxane; the ligand of this invention may be used to prepare an oligomer product that contains a mixture of hexenes and octenes. The hexenes and octenes produced with this ligand contain very low levels of internal olefins when produced under preferred reaction conditions. | 04-01-2010 |
20100217040 | 2, 2', 6, 6'- TETRASUBSTITUTED AMINOPHOSPHINE LIGAND AND ITS SYNTHESIS METHOD - The present invention relates to a 2,2′,6,6′-tetrasubstituted aminophosphine ligand and its synthesis method. The structure of the ligand is shown as below. Its synthesis method comprises: Step (1) coupling 2,6-dinitrochlorobenzene as the starting material to obtain 2,2′,6,6′-tetranitrobiphenyl; Step (2): hydrogenating the 2,2′,6,6′-tetranitrobiphenyl with Pd/C to obtain 2,2′,6,6′-tetraminobiphenyl; Step (3): reacting the 2,2′,6,6′-tetraminobiphenyl with a phosphine halide to obtain the 2,2′,6,6′-tetrasubstituted aminophosphine ligand. The ligand of the present invention is an achiral compound, and its preparation method is simple. The ligand can be converted to a chiral bimetallic catalyst with single configuration eventually through introduction of external chirality. Moreover, the ligand can be used in various asymmetric reaction catalyzed by metals with high reactivity and stereoselectivity. | 08-26-2010 |
20110178338 | POLYALKYLENE GLYCOL PRODUCING CATALYST, AND METHOD FOR PRODUCING POLYALKYLENE GLYCOL USING SAME - To provide a catalyst composed of a salt of a phosphazenium cation and an active hydrogen compound anion, which can be easily synthesized, does not contain metal components at all, and does not leave any odor on a resulting product; a method for its production; and an economical and efficient method for producing a polyalkylene oxide by means thereof. | 07-21-2011 |
20150031914 | P-N-P LIGAND - A new P-N-P ligand is useful in ethylene oligomerizations. In combination with i) a source of chromium; and ii) an activator such as methylalumoxane; the ligand of this invention may be used to prepare an oligomer product that contains a mixture of high purity alpha olefins. In a preferred embodiment, the ligand of this invention enables a selective oligomerization in which the majority of the liquid product is a mixture of hexene and octene. The amount of by-product polymer that is produced in preferred oligomerization reactions is advantageously low. | 01-29-2015 |
20160122371 | LIGAND COMPOUND, CATALYST SYSTEM FOR OLEFIN OLIGOMERAZATION, AND METHOD FOR OLEFIN OLIGOMERIZATION USING THE SAME - This disclosure relates to a ligand compound, a catalyst system for olefin oligomerization, and a method for olefin oligomerization using the same. The catalyst system for olefin oligomerization according to the present invention has excellent catalytic activity, and yet, exhibits high selectivity to 1-hexene and 1-octene, thus enabling efficient preparation of alpha-olefin. | 05-05-2016 |
564013000 | The phosphorus and nitrogen are members of the same ring | 3 |
20090131716 | CHIRAL TETRAAMINOPHOSPHONIUM SALTS, CATALYST FOR ASYMMETRIC SYNTHESIS AND METHOD FOR PRODUCING CHIRAL beta-NITROALCOHOL - A chiral tetraaminophosphonium salt represented by formula (1) and a method for producing chiral β-nitroalcohol comprising reacting an aldehyde or a ketone and a nitroalkane in the presence of the chiral tetraaminophosphonium salt represented by formula (1) and a base, or in the presence of a conjugated base of the chiral tetraaminophosphonium salt represented by formula (1): | 05-21-2009 |
20100160681 | Chiral phosphoramides, chiral N-phosphonimines and methods for forming the same - This application relates to the design and synthesis of new chiral imines reagents which can be utilized for the synthesis of chiral drugs and their precursors. It describes the design of the free NH2-group-attached chiral phosphoramides, a chiral N-phosphonimines and the methods for forming the same. The free NH2-group-attached chiral phosphoramides, having the structure of formula (I): | 06-24-2010 |
20140066654 | Solvent-Free Process for the Preparation of Cyclophosphamide - This invention discloses a solvent-free process for the preparation of cyclophosphamide. According to this invention, there is no solvent used during the reaction step for preparing cyclophosphamide, so that the total volume of the reaction for preparing cyclophosphamide can be reduced and the manufacture of cyclophosphamide can become more efficient. Furthermore, the above solvent-free process for the preparation of cyclophosphamide is more simply operated, more economic, and more environmental friendly than the preparation of cyclophosphamide in the prior art. | 03-06-2014 |
564014000 | Chalcogen and plural nitrogens bonded directly to the same phosphorus | 6 |
20080287709 | Method of Separating Acids from Chemical Reaction Mixtures by Means of Apolar Amines - A process for the removal of acids from reaction mixtures, comprising at least one product of value which is sparingly soluble in water, by at least one unpolar amine as an auxiliary base, which includes: a) reacting the auxiliary base with the acid with formation of a salt; b) reacting the salt formed in step a) with a further base which accepts the acid with liberation of the auxiliary base and combines with the acid to be accepted from the auxiliary base to form a salt which is very readily soluble in water; c) extraction of the mixture obtained in step b) with water or an aqueous medium, wherein the salt of the further base dissolves in the aqueous phase and the product of value, or the solution of the product of value, in a suitable solvent and the auxiliary base form at least one separate nonaqueous phase; and d) removal by distillation of at least part of any solvent present from the at least one nonaqueous phase obtained in step c), to form two nonmiscible liquid phases. | 11-20-2008 |
20090023954 | Ionic liquid containing phosphonium ion and method for producing the same - An ionic liquid of the present invention is “an ionic liquid comprising an organic substance represented by the following general formula (1) as a cation component” and “an ionic liquid comprising a cation component and an anion component, and the cation component is one or plural kinds selected from the group consisting of cation components represented by the following formula (1)”. | 01-22-2009 |
20100036160 | LITHIUM SALT AND METHOD FOR PRODUCING THEREOF - A main object of the present invention is to provide a lithium salt which can improve its lithium transference number when used as a supporting salt of an electrolyte solution or the like. To attain the object, the present invention provides a lithium salt comprising a chemical structure represented by the following general formula (1): | 02-11-2010 |
20110196172 | PROCESS FOR PREPARING N-(HYDROCARBYL) PHOSPHORIC OR THIOPHOSPHORIC TRIAMIDES - The invention provides a process for preparing N-(hydrocarbyl)phosphoric or thiophosphoric triamides with substantially improved yields and purity. Two equivalents of hydrocarbylamine are used in the reaction with phosphoryl or thiophosphoryl chloride and then with ammonia in an aromatic solvent. The invention further relates to N-(hydrocarbyl)phosphopric or thiophosphoric triamides having the purity of at least 98% wherein R is a hydrocarbyl group and X is O or S. | 08-11-2011 |
20140378704 | SYNTHESIS AND FORMULATIONS OF SALTS OF ISOPHOSPHORAMIDE MUSTARD AND ANALOGS THEREOF - Disclosed herein are formulations and methods of manufacture of compounds of formula (E): | 12-25-2014 |
20160251384 | METHOD OF SEPARATING ACIDS FROM CHEMICAL REACTION MIXTURES BY MEANS OF APOLAR AMINES | 09-01-2016 |