Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 7122553 | Liposomal formulation of irinotecan The present invention is for novel compositions and methods for treating cancer, particularly, for treating cancer in mammals and more particularly in humans. The therapeutic compositions of the present invention include liposome entrapped irinotecan in which the li... | 10/17/2006 |
| 7109276 | Method for free radical reduction of dithiocarbonylated or dithiophosphorylated functions borne by a polymer The invention concerns a method for preparing a polymer, comprising a step which consists in contacting: (A) at least a living organic polymer having at its chain end a dithiocarbonylated or dithiophosphorylated function capable of being reactivated; (B) at least a ... | 09/19/2006 |
| 7097737 | Method of making a modified unbleached pulp for lyocell products In accordance with the present invention, lyocell products can be made with unbleached pulps resulting in products with high amounts of hemicellulose and high amounts of lignin as compared to conventional lyocell products. The lyocell products of the present inventi... | 08/29/2006 |
| 6551467 | Microwave facilitated allyllic substitution The present invention is draw to microwave heating of a transition metal-catalysed organic reaction, in which a catalyst complex between a transition metal and an auxiliary ligand or ligands, the ligand being asymmetric or symmetric, monodentate or bident... | 04/22/2003 |
| 6491796 | Synthesis of phthalocyanines by microwave irradiation This invention provides a novel process for preparing soluble phthalocyanines by microwave irradiation in the absence of any organic solvent. Three different starting materials, i.e. t-butylphthalic anhydride, t-butyl phthalonitrile and metal-free H2... | 12/10/2002 |
| 6369231 | Process for preparation of 2-chloropyridine Described are processes for producing 2-chloropyridine by reacting pyridine with molecular chlorine in the vapor phase in the presence of a catalyst which includes an organic compound which generates free radicals under the conditions of the reaction.... | 04/09/2002 |
| 6348630 | Method for purifying hexamethylenediamine in mixtures of hexamethylenediamine and an unsaturated cyclic imine The level of an unsaturated cyclic imine (I) of the formula (I) ##STR1## where R1 is alkenyl having 3, 4, 5, 6, 7, 8, 9, 10, 11 carbon atoms belonging to the ring system, in a mixture comprising hexamethylenediamine and an imine (I) is reduced ... | 02/19/2002 |
| 6328855 | Method for producing (+)-exo-6-phenyl-3-azabicyclo-[3.2.0]heptanes A process for preparing (+)-exo-6-phenyl-3-azabicyclo[3.2.0]heptanes of the formula I ##STR1## where R is hydrogen, chlorine, bromine, fluorine or methoxy, which comprises photocyclizing a bisallylammonium salt of the formula II ##STR2## where R has ... | 12/11/2001 |
| 5904818 | Process for the regeneration of an aqueous process liquid of the amine-oxide process The invention is concerned with a process for the production of a solution of N-methylmorpholine-N-oxide in water, characterized by the following steps: (a) providing an aqueous solution containing N-methylmorpholine and morpholine and exhibiting a pH val... | 05/18/1999 |
| 5536376 | Method for production of 2-chloropyridine and 2,6-dichloropyridine A method for producing 2-chloropyridine and 2,6-dichloropyridine by the steps of mixing vaporized chlorine and vaporized water to obtain dilute chlorine; introducing the dilute chlorine and vaporized pyridine into a reactor; and reacting the vaporized pyr... | 07/16/1996 |
| 5486275 | Nitrogen-containing perfluoroalkyl bromide and method for production thereof A nitrogen-containing perfluoroalkyl bromide, a novel compound to the art, is represented by the formula, ##STR1## wherein Rf1 and Rf2 independently stand for a perfluoroalkyl group of one to five carbon atoms, provided that Rf | 01/23/1996 |
| 5484932 | Halogenation processes in advantageous solvents, and novel bistrifluoromethyl-polyfluoroalkoxybenzenes Compounds such as ##STR1## wherein R is F, CF3, CF2 H, CHF CF3 or CF2 CF3, as well as related compounds containing chlorine, are used as solvents in halogenation processes.... | 01/16/1996 |
| 5453161 | Polyamic acid to polyimide conversion by microwave heating An intermolecular and/or intramolecular non-foamed polyimide is prepared by heating an aromatic tetracarboxylic acid or dianhydride thereof and an aromatic diamine thereby preparing a polyamic acid, and then subjecting the polyamic acid in the solid phase... | 09/26/1995 |
| 5439794 | Mixed ligand complexes and uses thereof as binding agents to DNA This invention concerns a coordination complex or salt thereof which is spectroscopically or photoactively determinable when bound to DNA having the formula ##STR1## wherein M is a suitable transition metal and each of R1, R2 an... | 08/08/1995 |
| 5225556 | Chemical probes for left-handed DNA and for A-DNA; chiral metal complexes as Z-specific antitumor agents and as double strand cleavers This invention concerns a coordination complex and salts and optically resolved enantiomers thereof, of the formula (R)3 --M, wherein R comprises 1,10-phenanthroline or a substituted derivative thereof, M comprises a suitable transition metal, ... | 07/06/1993 |
| 5225562 | Method of preparing (+)-deoxoartemisinin and selected analogues of (+)-deoxoartemisinin This invention is a new method for preparing compounds useful as antimalarial agents having the formula; ##STR1## wherein R is hydrogen, a linear, branched or cyclo lower alkyl group having 1 to 8 carbon atoms; aminoalkyl; branched aminoalkyl; hydrox... | 07/06/1993 |
| 5141608 | Process of preparing 2-chloropyridine and/or 2,6-dichloropyridine 2-chloropyridine and/or 2,6-dichloropyridine are effectively produced by reacting pyridine with chlorine gas in the gaseous phase with irradiation of ultraviolet rays, while the reaction gas mixture is being agitated.... | 08/25/1992 |
| 5091535 | Organic photochromic compound, a dimer of pyrido quinoline An organic photochromic compound with improved long term preservability, thermal stability, the repetition character of the record and the like and useful as recording-memory materials or photosensitizers, comprising dimers of the compounds selected from ... | 02/25/1992 |
| 4980475 | Process for the preparation of N-10 alpha-methoxyl-lumilysergol and esters, thereof, and intermediates for their preparation Processes for the preparation of esters of N1 -methyl-10-methoxylumilysergol are described, in which lysergol esters are subjected to N-methylation and subsequently to photochemical reaction with methanol/H2 SO4. Th... | 12/25/1990 |
| 4976834 | Asymmetric photochemical reaction process An optically active substance having an optical purity of at least 50% e.e. is obtained by an asymmetric photochemical reaction by converting a starting, achiral material in a chiral crystalline form and irradiating light to the chiral crystalline form to... | 12/11/1990 |
| 4977259 | Process for preparing reactive stabilizing compound Reactive stabilizing compounds, able to stabilize organic polymers, contain in their molecule a sterically hindered amino group and a hydrolyzable silyl function. In stabilizing organic polymers, said reactive stabilizing compounds can be hydrolyzed at th... | 12/11/1990 |
| 4957609 | Process for preparing N-heterocyclic compounds The invention relates to a process for the preparation of compounds of general formula (I) ##STR1## wherein R1 represents a hydrogen atom or a C1-10 alkyl, C3-7 cycloalkyl, C3-7 cycloalkyl-(C1-4)... | 09/18/1990 |
| 4957608 | Preparation of 8-bromomethyl-3-methylquinoline compounds A process for the preparation of 8-bromomethyl-3-methylquinoline compounds of the formula I ##STR1## where one or both substituents X are chlorine and, where relevant, the other substituent X is hydrogen, by bromination of the corresponding 8-me... | 09/18/1990 |
| 4940520 | Process for the preparation of 4-acyloxyazetidin-2-one by singlet oxygen oxidation The 4-acyloxyazetidin-2-ones, which are intermediates in the production of carbapenems and penems, are produced from 4-furanylazetidin-2-ones by singlet oxygen oxidation.... | 07/10/1990 |
| 4908442 | Tetra ketone porphyrin monomers and the process of preparation thereof The present invention relates to a tetraketone of the structure ##STR1## wherein M is a metal atom and R is selected from phenyl, alkyl substituted phenyl or halogen substituted phenyl. The process to prepare this tetraketone is disclosed. The presen... | 03/13/1990 |
| 4898654 | Method of producing optically active ଲ-lactam derivatives Disclosed is a method of producing an optically active ଲ-lactam derivative of the formula ##STR1## comprising irradiating with light, in solid phase, an inclusion complex of a compound of the formula ##STR2## with an optically active ... | 02/06/1990 |
| 4891108 | Process for preparing tetrahalopyridines Symmetrical or 2,3,5,6-tetrahalopyridine is prepared by reacting 3,5-dihalopyridine in the liquid phase with chlorine or bromine while heating and irradiating the reactants with ultraviolet light. The reaction may be carried out with or without a chlorina... | 01/02/1990 |
| 4888100 | Photochemical conversion of cephalosporins, 1-carba(1-dethia)cephalosporins and 1-oxa(1-dethia)cephalosporins A process for photochemically converting 3-exomethylene cephams (or 1-carba(1-dethia)cephams or and 1-oxa(1-dethia)cephams) from the corresponding 3-alkyl-3-cephem (or 1-carba(1-dethia)cephem or 1-oxa(1-dethia)cephem) is provided. Further provided are 3-c... | 12/19/1989 |
| 4886735 | Photopolymerizable recording materials and photoresist layers and lithographic printing plates based thereon Photopolymerizable recording materials suitable for producing photoresist layers and lithographic printing plates are composed of one or more photopolymerizable olefinically unsaturated organic compounds, optionally a polymeric binder, one or more photopo... | 12/12/1989 |
| 4870179 | Process for preparing lysergol derivatives A method of preparing lysergol derivatives, particularly 10-methoxy lumilysergol, 1-methyl-10-methoxy-lumilysergol and C8 esters of 1-methyl-10-methoxy-lumilysergol, is provided characterized in that lysergol esters are subjected to p... | 09/26/1989 |
| 4851094 | Process for producing amidine sulfonic acid intermediates for guanidines An efficient synthesis of quanidines, e.g. of the formula (III), by oxidizing a thiourea, e.g. of the following formula (II): ##STR1## with H2 O2 and a molybdenum catalyst to yield an aminoiminomethane sulfonic acid which can th... | 07/25/1989 |
| 4820846 | Triarylmethane compounds, their preparation and use as photoconductive systems Compounds which are useful as sensitizers of photoconductors, having the general formula: ##STR1## in which: like symbols represent identical substituents, at least 4 of R1 to R9 represent hydrogen atoms and the remaining R... | 04/11/1989 |
| 4754029 | 3-oxo-2-azabicyclohexane derivatives 3-Oxo-2-azabicyclohexane derivatives represented by the general formula: ##STR1## wherein R1 represents an optically active menthoxy group or an optically active 1-phenylethoxy group when R2 and R3 are combined to for... | 06/28/1988 |
| 4668356 | Photolytic process for the formation of carbon-containing free radicals and its applications to free radical polymerization in particular Process for the formation of carbon-containing free radicals R., which optionally include functional groups, wherein thermal and/or photochemical energy is supplied to a thiocarbonyl-containing ester corresponding to the general formula (I): ##STR1##... | 05/26/1987 |
| 4554007 | Geometrical isomer of 1-substituted-1-triazolylstyrenes, and their production and use as fungicide, herbicide and/or plant growth regulant The present invention relates to one of the two geometrical isomers (a compound defined as I-A isomer in the description below) of a triazole compound represented by the formula (I) or (II), ##STR1## wherein R1 is a hydrogen atom, a C... | 11/19/1985 |
| 4545880 | Photochemical process for preparing camptothecin derivatives New Camptothecin derivatives possessing high anti-tumor activity with slight toxicity, represented by the general formula: ##STR1## wherein R1 stands for a hydrogen atom, an alkyl group, a hydroxyl group, an alkoxy group or an acyloxy grou... | 10/08/1985 |
| 4526986 | Halomethyl, methyl maleic anhydride and synthesis of bromomethyl, methyl maleic anhydride Quaternary ammonium compounds containing anhydride groups are prepared by halogenating dimethylmaleic anhydride and reacting the halogenated product with a tertiary amine. The products are useful as surfactants, biocides and as cosurfactants in enhanced o... | 07/02/1985 |
| 4492619 | Photochemical process for preparing alkoxy substituted compounds N-Chlorolactams, -amides, and -carbamates are photolyzed in alcoholic solution to provide N-(alpha-alkoxyalkyl)-substituted derivatives. These derivatives are interacted with hydroxylated acrylate or methacrylate esters to yield monomers which may be poly... | 01/08/1985 |
| 4483757 | Photochemical process for preparing amines Aliphatic, cycloaliphatic, heterocyclic aliphatic and aromatic amines are prepared in a liquid phase reaction under the influence of light energy in the presence of a specified ammonium halide photocatalyst whereby addition of N--H bonds from ammonia or a... | 11/20/1984 |
| 4473692 | Camptothecin derivatives and process for preparing same New Camptothecin derivatives possessing high anti-tumor activity with slight toxicity, represented by the general formula: ##STR1## wherein R1 is a hydrogen atom, an alkyl group, a hydroxyl group, an alkoxy group or an acyloxy group, R | 09/25/1984 |
