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| Number | Title | Issue Date |
| 8088955 | Alpha-substituted α,β-unsaturated E- or Z-aldehydes, use thereof, and processes for their preparation α,β This invention relates to novel alpha-substituted α,β-unsaturated E- or Z-aldehydes, or isomer mixture thereof, of the formula (I) in which R1 and R2 may be identical or different and are each H or a hydrocarbon, in which the hydrocarbon may ... | 01/03/2012 |
| 7586009 | Bis-(hydroxybenzaldehyde) compound and novel polynuclear polyphenol compound derived therefrom and method for production thereof Provide a new bis-(hydroxybenzaldehyde) compound, as well as a new polynuclear polyphenol compound derived therefrom, suitable for use as component materials for photosensitive resist compositions, component materials and hardeners for epoxy resins, developers and a... | 09/08/2009 |
| 7276632 | Method for the production of 2,3--substituted 2-aryl propenals The invention relates to a method for producing 2,3-cis-substituted 2-aryl propenals by condensing a 2-aryl acetaldehyde I with a non-enolizable aldehyde compound II in the presence of a base. The inventive method is characterized in that the reaction is carried out... | 10/02/2007 |
| 7173148 | Process for producing 1-acetoxy-3-(substituted phenyl)propene compound The compounds represented by the formula (I) are produced by reacting benzene compound of the formula (IV) or (V) with alkenylidene diacetate of the formula (VI) in the presence of a catalyst comprising one or more members selected from (a) halogenated boron compoun... | 02/06/2007 |
| 7154008 | Production method of alkylbenzaldehydes In the production of an alkylbenzaldehyde by a method comprising a step of preparing a solution of complex of a starting alkylbenzene and a hydrogen fluoride-boron trifluoride catalyst and a step of formylation by bringing the solution of complex into contact with c... | 12/26/2006 |
| 7145043 | Non-Hazardous oxidative neutralization of aldehydes Methods, compositions, and devices for alleviating the problems of toxic discharge of aldehydes present in waste streams are disclosed. The methods relate to forming neutralized aldehydes by treating aldehydes with oxidizing agents. The oxidizing agents offer a simp... | 12/05/2006 |
| 7122705 | Method for preparing 3-cyclopentyloxy-4-methoxybenzaldehyde Processes for coupling phenol and cycloalkyls including combining an optionally substituted phenol, a cycloalkyl substituted with a leaving group, carbonate salt, tetrahydrofuran, and an optional phase transfer agent are provided. Also provided are processes for pre... | 10/17/2006 |
| 7078571 | Preparation of 1,3-di-halo-substituted benzene derivatives A process for preparing 1,3-di-halo-substituted benzene derivatives (II) from 2,6-di-halo-substituted benzaldehydes (I) (where X1, X2 are each independently F, Cl, Br, and R1, R2, R3 are each independently H, ha... | 07/18/2006 |
| 6965055 | Process for producing cinnamaldehyde derivatives, use thereof and the like A process for conveniently and efficiently producing a highly pure cinnamaldehyde derivative, for example, (2E)-(3-hydroxy-4-methoxy)cinnamaldehyde, which comprises reacting a benzaldehyde derivative, such as isovanillin and the like, with acetaldehyde in the presen... | 11/15/2005 |
| 6949682 | Cinnamaldehyde derivatives inhibiting growth of tumor cell and regulating cell cycle, preparations and pharmaceutical compositions thereof The present invention relates to cinnamaldehyde derivatives inhibiting growth of tumor cell and regulating cell cycle, the method for preparation and the pharmaceutical composition thereof. The cinnamaldehyde derivatives of the present invention can be effectively u... | 09/27/2005 |
| 6723883 | Continuous method for production of cinnamaldehyde and dihydrocinnamaldehyde derivatives The present invention relates to a continuous process for the preparation of cinnamaldehyde or cinnamaldehyde derivatives by continuous reaction of benzaldehyde derivatives with alkanals in the presence of bases and optionally subsequent continuous hydrogenation in ... | 04/20/2004 |
| 6703527 | Method for oxidation of allyl alcohol Allyl alcohols are converted into corresponding aldehydes or ketones in a high yield under a mild condition by using an inexpensive aluminum alkoxide as an Oppenauer oxidation catalyst and a hydride acceptor. Thus, there is provided an industrially useful... | 03/09/2004 |
| 6670510 | Process for preparing 2,5-dimethoxy benzaldehyde The present invention recites a process for the of 2,5-dimethoxy-benzaldehyde by reacting a 2-hydroxy-5 methoxy-benzaldehyde with a suitable metal hydroxide in the presence of a suitable solvent to make a metal salt of 2-hydroxy-5-methoxy benzaldehyde com... | 12/30/2003 |
| 6630607 | Aromatic methylidene compounds, aromatic aldehyde compounds and methylstyryl compounds used to prepare the methylidene compounds, and methods for preparing these compounds Aromatic methylidene compounds of the following general formula ##STR1## wherein R11 and R21 independently in each occurrence represent an unsubstituted or substituted alkyl or alkoxy group, a halogen, a cyano group or a nitro gr... | 10/07/2003 |
| 6596909 | Adsorption of aldehyde with adsorbent containing zeolite The present invention provides the adsorbent which adsorbs the aldehyde efficiently for a long period. The present invention also includes an adsorption device, an article and a method using the same. The adsorbent of the invention comprises a zeolite, wh... | 07/22/2003 |
| 6531634 | Non-hazardous oxidative neutralization of aldehydes Methods, compositions, and devices for alleviating the problems of toxic discharge of aldehydes present in waste streams are disclosed. The methods relate to forming neutralized aldehydes by treating aldehydes with oxidizing agents. The oxidizing agents o... | 03/11/2003 |
| 6515137 | Catalytic processes employing chiral imidazolidinone-based catalyst composition Acid addition salts of imidazolidinones are provided as catalysts for transforming a functional group within a first reactant by reaction with a second reactant. Exemplary first reactants are ,ଲ-unsaturated carbonyl compounds such as ,... | 02/04/2003 |
| 6448409 | Method for the synthesis of chiral allylic alcohols utilizing selone based chiral derivatizing agents Molecules containing a chiral 1,2-diol unit are synthesized from reactions between aldehydes and N-acyl selones. A chilled N-acyl selone is reacted with a Lewis acid such as TiCl4 and mixed with a tertiary amine such as diisopropylethylamine to... | 09/10/2002 |
| 6437190 | Preparation of aldols using a microstructured reaction system A process for preparing aldols by catalytic reaction of aldehydes and/or ketones comprises conducting said reaction in the channels of a microstructured reaction system.... | 08/20/2002 |
| 6433230 | Process for conducting an aldol condensation ,ଲ-Unsaturated keto compounds are prepared by base-catalyzed aldol condensation of aldehydes and/or ketones having from 1 to 15 carbon atoms, comprising: reacting the aldehydes and/or ketones with an aqueous catalyst solution under adiabatic ... | 08/13/2002 |
| 6417407 | Method of making 2-bromo-4-chloro substituted phenols A 2-bromo-4-chloro substituted phenol is prepared from a first composition of a substituted phenol and benzotrifluoride in a weight ratio to the substituted phenol of about 2 to about 4. Into the first composition is sparged about 1 to about 1.5 equivalen... | 07/09/2002 |
| 6407029 | Mixtures comprising tetrakis(pyrrolidino/piperdino)phosphonium salts The present invention relates to mixtures comprising from 70 to 99.5% by weight of a compound of the formula (R)4 P+ X- (1) and from 30 to 0.5% by weight of a compound of the formula (R)3 P.dbd.O (2), where R is... | 06/18/2002 |
| 6184421 | Method for preparing a 4-hydroxybenzaldehyde and derivatives The present invention concerns a process for the preparation of a 4-hydroxybenzaldehyde and its derivatives. More particularly, the invention concerns the preparation of 3-methoxy-4-hydroxybenzaldehyde and 3-ethoxy-4-hydroxybenzaldehyde, respectively know... | 02/06/2001 |
| 6184404 | Process for the selective alkylation of aldehydes by means of organozinc compounds There is described a process for the enantioselective alkylation of aldehydes by means of organozinc compounds, of which a ligand of the zinc is transferred to the aldehyde, and the other ligand acts as so-called dummy ligand. As novel substances there ar... | 02/06/2001 |
| 6166273 | Processes for fluorinating aromatic ring compounds A process is provided for increasing the fluorine content of benzene or pyridine rings which are optionally substituted with from 1 to 3 inert substituents. The process involves (a) contacting the ring with a metal fluoride composition comprising cupric f... | 12/26/2000 |
| 6127581 | Process for preparing fluorinated benzyl alcohols and fluorinated benzaldehydes Fluorinated benzaldehydes are obtainable in a simple and inexpensive manner and in significantly improved yields when chlorinated benzaldehydes are reacted with alkali metal fluorides at temperatures in the range from about 130 to 200° C. in the presence... | 10/03/2000 |
| 6114587 | Process and catalyst for the selective production of -alkylcinnamaldehyde The selective obtainment of -alkyl cinnamaldehydes, such as Jasmine aldehyde is carried out by a process that involves two consecutive reactions: acetalization of an n-alkyl aldehyde by direct reaction with an alcohol or by transacetalization follo... | 09/05/2000 |
| 6020531 | Process for the preparation of 2,6-disubstituted benzothiophene compounds A benzothiophene compound represented by a formula: ##STR1## wherein R1 represents a lower alkyl group, and R2 represents a halogen atom; a lower alkyl group; or a cycloalkyl group or cycloalkenyl group which may optionally be s... | 02/01/2000 |
| 5856583 | Synthesis of 2-hydroxyarylaldehydes A method for the preparation of 2-hydroxyarylaldehydes from an aryloxy magnesium compound and formaldehyde, which comprises reacting at a temperature from 40°-120° C., an aryloxy magnesium compound having an aryloxy anion and a non-aryloxy anion and in ... | 01/05/1999 |
| 5786516 | Process for the preparation of isovanillin The present invention relates to a novel process for the preparation of isovanillin. The process for the preparation of isovanillin according to the invention is characterized in that it consists in dealkylation being carried out using a strong acid, sele... | 07/28/1998 |
| 5770762 | Process for producing 4-substituted-2-butenals Described is a process for producing a 4-substituted-2-butenal represented by the following formula (1); ##STR1## (wherein X represents an acyloxy group or halogen atom; R represents hydrogen atom, an aliphatic hydrocarbon group or an aromatic hydroc... | 06/23/1998 |
| 5763675 | Process for the preparation of 2-hydroxyarylaldehydes under reduced pressure A method for the preparation of a 2-hydroxyarylaldehyde which comprises reacting a magnesium bis-hydrocarbyloxide, derived at least in part from a hydroxyaromatic compound having at least one free position ortho to the hydroxyl group, with formaldehyde or... | 06/09/1998 |
| 5756853 | Process for the preparation of a substituted 4-hydroxybenzaldehyde The subject of the present invention is a process for the preparation of a 4-hydroxybenzaldehyde carrying at least one substituent in the position ortho to the OH group. It more particularly relates to the preparation of 3-methoxy-4-hydroxybenzaldehyde an... | 05/26/1998 |
| 5728892 | Method for preparing an alpha-alkycinnamaldehyde The invention relates to a method for preparing an -alkylcinnamaldehyde via aldol concensation of a benzaldehyde and an alkanal, with pyrrolidine being employed as a catalyst. The method is suitable, in particular, for preparing -hexylcinnam... | 03/17/1998 |
| 5703269 | Process for preparing aromatic olefins The preparation of aromatic olefins from haloaromatics and olefins (Heck reaction) is carried out in the presence of palladium complexes as catalysts, which complexes contain heterocyclic carbenes as ligands.... | 12/30/1997 |
| 5648552 | Process for the preparation of isovanillin The present invention relates to a novel process for the preparation of isovanillin. The process for the preparation of isovanillin according to the invention is characterized in that it consists in dealkylation being carried out using a strong acid, sele... | 07/15/1997 |
| 5502257 | Process for the production of cyclopropanecarboxaldehyde Disclosed is a process for the preparation of cyclopropanecarboxaldehyde by the thermal isomerization of 2,3-dihydrofuran under superatmospheric pressure, e.g., at a temperature of about 300° to 600° C. and a pressure of about 3 to 345 bars absolute.... | 03/26/1996 |
| 5457239 | Process for formylation of aromatic compounds A process for the preparation of a formylated aromatic compound comprising contacting an aromatic compound with (i) a halogenated compound in the presence of a Lewis acid, and (ii) a base, is described. The subject process provides an efficient and effect... | 10/10/1995 |
| 5434302 | Method for the preparation of optically active 2-aryl alkyl aldehydes and formation of 2-aryl-alkanoic acids therefrom The present process is directed to preparing optically active 2-aryl alkyl aldehydes by various processes through the use of an optically active amine, (-)-2'-amino-3-phenyl propane. The aldehyde formed can then be oxidized to produce the corresponding ac... | 07/18/1995 |
| 5430194 | Process for improving enantiomeric purity of aldehydes The present invention relates to a process for producing an optically active aldehyde (first aldehyde) containing a reduced amount of the corresponding enantiomeric aldehyde (second aldehyde) which process comprises: (1) providing an initial solution cont... | 07/04/1995 |
