Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 6777440 | HIV integrase inhibitors The present invention relates to the inhibition of HIV integrase, and to the treatment of AIDS or ARC by administering compounds of the following formula, or a tautomer of said compound, or a pharmaceutically acceptable salt, solvate or prodrug thereof: ... | 08/17/2004 |
| 6639094 | Process for producing -aminoketone derivatives A process for producing -amino-dihalogenated methyl ketone derivatives by reacting an N-protected -amino acid ester with a dihalomethyl lithium is provided. This process is suitable for the production on an industrial scale and by this proce... | 10/28/2003 |
| 6469205 | Method for oxidation of xylene derivatives Xylene derivatives, such as chloro-ortho-xylene, are oxidized in the absence of solvent or added promoter in the presence of at least one metal catalyst. The primary products are chlorophthalic anhydride and chlorotoluic acid.... | 10/22/2002 |
| 6465685 | Method for oxidation of xylene derivatives Xylene derivatives, such as chloro-ortho-xylene, are oxidized in a solvent in the presence of at least one metal catalyst with addition of promoter after the reaction has proceeded to an intermediate stage of conversion to product mixture. The product com... | 10/15/2002 |
| 6127573 | Oxidaton of primary alcohols to carboxylic acids with a TEMPO catalyst using NaClO2 and NaClO The present invention relates to a TEMPO-catalyzed oxidation of primary alcohols, RCH2 OH to corresponding carboxylic acids, RCOOH in the presence of catalytic in the presence of catalytic amount of NaClO and stoichiometric amount of NaClO... | 10/03/2000 |
| 6087530 | Process for preparing ଲ-amino--hydroxy acid derivatives An object of the present invention is to provide a process for producing a ଲ-amino--hydroxy acid derivative via efficient and industrially utilizable steps. The present invention provides a process for producing a ଲ-amino--hydrox... | 07/11/2000 |
| 6020518 | Process for preparing ଲ-amino--hydroxy acid derivatives An object of the present invention is to provide a process for producing a ଲ-amino--hydroxy acid derivative via efficient and industrially utilizable steps. The present invention provides a process for producing a ଲ-amino--hydrox... | 02/01/2000 |
| 6008407 | Method of preparing fluoroaromatic compounds The present invention provides a method of preparing ortho-difluorobenzene derivatives, which comprises (a) providing a mixture of cyclohexenes by reacting chlorotrifluoroethylene (CTFE) and 1.3-diene in a flow reactor and distilling the resultant, and (b... | 12/28/1999 |
| 5869740 | Herbicide intermediates Compounds of the formula: ##STR1## wherein R is CH2 X or CHX2 and X is chloro or bromo and R1 is chloro, bromo or nitro which are useful as intermediates for preparing herbicidal 2-(2'-substituted)-4'-(alkylsulfo... | 02/09/1999 |
| 5783729 | Chemical process for the production of sulfonyl benzoic acids A process for preparing a compound of formula (I), ##STR1## where R1 is optionally substituted alkyl or phenyl, R2 is COOH, and R3 and R4 are independently selected from hydrogen, halo, haloalkyl, nitro, hy... | 07/21/1998 |
| 5036156 | Process for the preparation of -bromo-phenylacetic acids Compounds of formula ##STR1## in which R1 and R2 are hydrogen or halogen, are prepared by reacting an aldehyde of formula: ##STR2## with CHBr3 and KOH in a mixture of an inert solvent and water. Further an e... | 07/30/1991 |
| 4929753 | Preparation of trifluoromethylbenzoic acid from hexafluoroxylene Trifluoromethylbenzoic acid is obtained at high yield from ,,,',','-hexafluoroxylene, which is a relatively inexpensive compound, by reacting this compound with a strong acid in sulfuric acid which is at least par... | 05/29/1990 |
| 4845279 | Method of preparing 4-trifluoromethyl-2-nitrobenzoic acid and novel isomer An isomer mixture of 4-trifluoromethyl-2-nitrobenzoic acid and 4-trifluoromethyl-3-nitrobenzoic acid, which is a novel compound, is obtained by nitrating a compound represented by ##STR1## (Z is COY or CY3, and Y is a halogen atom) with a ... | 07/04/1989 |
| 4806681 | Process for producing cinnamic acid from 1,1,1,3-tetrachloro-3-phenylpropane This invention relates to a process for preparing cinnamic acid by hydrolysis of 1,1,1,3-tetrachloro-3-phenylpropane with acetic acid, trifluoroacetic acid or formic acid, optionally in the presence sulphuric acid, phosphoric acid, para-toluenesulphonic a... | 02/21/1989 |
| 4786443 | Process for the carbonylation of olefinically unsaturated compounds with a palladium catalyst Process for the carbonylation of olefins with CO in the presence of water, an alcohol and/or a carboxylic acid in the presence of a catalyst composition based on (a) a Pd compound, (b) a protonic acid, and (c) a phosphine PR1 R2 R3 | 11/22/1988 |
| 4327226 | Process and apparatus for producing aromatic dicarboxylic acids A process and an apparatus for producing an aromatic dicarboxylic acid by oxidizing a benzene derivative with molecular oxygen in the liquid phase in a lower aliphatic carboxylic acid as a solvent in the presence of an oxidation catalyst, wherein a starti... | 04/27/1982 |
| 4082913 | Phenoxyalicyclic carboxylic acid derivatives Novel anti-atherosclerosis agents having the formula, ##STR1## wherein R is hydrogen or lower alkyl, n and m each signify an integer of 4 - 6, and A is hydrogen or a group of the formula, ##STR2## WHEREIN R and m have the same meanings as define... | 04/04/1978 |
| 4075238 | Polyhalobenzylic disulfooxonium compounds Polyhalobenzylic disulfooxonium compounds are produced by the reaction of aromatic methyl, halomethyl or hydroxymethyl substituents with sulfur trioxide. The disulfooxonium salts are readily converted to alcohols by hydrolysis to provide monomers for the ... | 02/21/1978 |
| 4021492 | Dibromination process The ,-dibromo-substituted or unsubstituted-4-pivaloyl toluenes, e.g., ,-dibromo-4-pivaloyl toluene, are prepared by bromination of a corresponding p-pivaloyl toluene with liquid bromine at a temperature of at least 125° C.... | 05/03/1977 |
| 4007220 | Preparation of phthalaldehydic acid from ,,,','-pentachloro-o-xylene High yields of phthalaldehydic acid from ,,,','-pentachloro-o-xylene can be obtained in an excellent degree of purity if a mixture of said pentachloroxylene and phthalaldehydic acid in water is heated to a temperatu... | 02/08/1977 |
