摘要:
A method for cleaving a bisphenol which comprises: (1) a cleavage step comprising feeding a mixture of a bisphenol and derivatives of chroman and flavan which are by-produced during the production of a bisphenol to a cleavage reactor and effecting cleavage reactions in the presence of a basic or acidic catalyst at 150 to 260 DEG C under a reduced pressure of 300 mmHg or less, (2) a distillation step comprising feeding the products of the cleavage reactions to a distillation column in a gaseous state and conducting a distillation at 130 to 200 DEG C under a reduced pressure of 300 mmHg or less, and (3) a reflux step comprising condensing the distillate from the distillation step, recycling a part of the resultant condensate to the distillation step at a reflux ratio of 0.01 to 3 and drawing out the rest of the condensate to the outside of the system. The method can be employed for producing a product containing isopropenyl phenol and phenol with high purity.
摘要:
The present invention relates to novel specifically-substituted phenyl compounds, especially substituted di- tert -butyl phenol derivatives, which are effective as anti-inflammatory, analgesic and/or antipyretic agents. These phenyl compounds are substituted with a low molecular weight alkyl chain which terminates in a specific unsaturated functional group. These unsaturated functionalities are -C=CH, C=CH₂, C=C=CH₂, and aldehydes in the form of their acetals. The present invention further relates to pharmaceutical compositions which contain an anti-inflammatory agent of the present invention and a pharmaceutically-acceptable carrier. Finally, the present invention relates to methods for treating diseases characterized by inflammation, such as rheumatoid arthritis and osteoarthritis, in humans or lower animals. Such methods comprise administering to a human or lower animal in need of such treatment a safe and effective amount of an anti-inflammatory agent or composition of the present invention.
摘要:
An alkylated hydroxyl-containing aromatic compound is produced by isomerizing a normal alpha-olefin having from about 16 to about 30 carbon atoms in the presence of a first solid, acidic catalyst capable of inducing both olefin isomerization and skeletal isomerization to produce a mixture of isomerized olefin, then alkylating an hydroxyl-containing aromatic compound with the mixture of isomerized olefins in the presence of a second solid, acidic catalyst. The first solid, acidic catalyst can be SM-3, MAPO-11, SAPO-11, SSZ-32, ZSM-23, MAPO-39, SAPO-39, ZSM-22, SSZ-20, ZSM-35, SUZ-4, NU-23, NU-87, natural ferrierite or synthetic ferrierite. The second solid, acidic catalyst can be a sulfonic acid anionic ion exchange resin catalyst or an acidic clay.
摘要:
Novel and biologically active cyclisation substrates are disclosed of the formula: wherein: (a) R, is H or alkyl of one to four carbon atoms; (b) R 2 is H or alkyl of one to four carbon atoms, with the proviso that R, is H when R 2 is alkyl, and with the proviso that R 2 is H when R, is alkyl; (c) R. is a suitable leaving group selected from the group consisting of hydroxy, alkoxy of one to four carbons, alkoxyalkoxy of two to four carbons, acyloxy of one to about seven carbon atoms, and trialkylsilyioxy of less then fifteen carbons; (d) R, is H, hydrocarbyl of one to fourteen carbons, carboxyacyl of two to twelve carbons, trialkylsilyl of less than fifteen carbons, and heterocyclic of five to seven atoms and four to six carbons; and (e) R5(1) and R5(2) are each H, alkyl of one to eight carbons, or an optionally esterified or etherified hydroxy group selected from the group consisting of hydroxy, alkoxy of one to four carbons, alkoxy-alkoxy of two to four carbons, trialkylsilyloxy of one to fifteen carbons, cycloalkoxy of four to eight carbons, carboxyacyloxy of one to seven carbons, or unsuhstituted heterocyclic ether of five to seven members, with the proviso that at least one of R5(1) and R5(2)is hydrogen. A method is disclosed for the cyclisation of the compounds of formula leading to novel and biologically active compounds of the following formulae: having R, as defined above, with R. being R5(1) or R5(2) as defined above, and R. being alkyl of from about one to about four carbon atoms.
摘要:
Disclosed is a preparation process of an acetylene derivative comprising reacting a compound having a skeleton represented by the formula (1) : in the molecular formula with a compound represented by the formula (2) : wherein R 1 , R 2 , R 3 and R 4 are each a substituted or unsubstituted, saturated or unsaturated alkyl group or a substituted or unsubstituted aryl group, for instance having 1 to 6 carbon atoms, and can be the same or different, R 1 and R 2 or R 3 and R 4 can bond to form a ring including a nitrogen atom or nitrogen atom and other hetero atoms; or R 1 and R 3 can bond to form a ring including a nitrogen atom or a nitrogen atom and other hetero atoms; or with a compound represented by the formula (3): wherein R 1 , R 2 , R 3 and R 4 are the same as in the formula (2), and X 1 is a chlorine, bromine or iodine atom.
摘要:
Meta-hydroxyphenylacetylenes are produced from phenyl-substituted ketal or acetal precursors. Using biotransformation processes, these precursors serve as substrates that are converted to cis-dihydrodiol intermediates. The cis-dihydrodiols can be converted chemically to the corresponding meta-substituted compounds, e.g., meta-substituted phenols, and then to m-hydroxyphenylacetylene, which is an intermediate needed to produce acetylene-terminated resins. The biotransformation step employs arene-2,3-dioxygenase in intra- or extra- cellular form.
摘要:
Die erfindungsgemäßen neuen Phenolderivate sind spezifisch wirkende, hinreichend stabile 5-Lipoxygenenase-Inhibitoren und insbesondere in Arzneimittelzubereitungsformen zur Therapie pathologischer Zustände, an denen Leukotriene als Mediatoren beteiligt sind, einsetzbar. Sie entsprechen der allgemeinen Formel worin A und B gleich oder verschieden und jeweils -C=C-, cis-CH=CH- oder trans-CH=CH- sind, R, Wasserstoff oder ein gegebenenfalls wie definiert substituierter Alkyl-, Cycloalkyl- oder Phenylrest ist, R 2 und R 3 einen der definierten Reste, bevorzugt Wasserstoff, darstellen, R 4 Wasserstoff, Alkyl oder Acyl ist, R 5 für eine Carboxygruppe oder ein funktionelles Derivat davon oder für eine freie, veretherte oder veresterte Hydroxylgruppe steht und R 6 einen der definierten Reste, bevorzugt Wasserstoff oder Methoxy, bedeutet. Die erfindungsgemäße Herstellung der Verbindungen der Formel I erfolgt insbesondere durch Aufbau der aliphatischen Kette, ausgehend von geeigneten Acetylenverbindungen oder mit Hilfe von Wittig-Reaktionen. Der Rest R 5 kann anschließend z. B. in andere gewünschte Carboxygruppenderivate umgewandeltwerden. Insbesondere durch katalytische Hydrierung lassen sich A und B im Rahmen der Definition variieren.
摘要:
A compound of formula (I): or a salt thereof, in which Y is a group where m is an integer of from 1 to 5, n is an integer of from 4 to 12, each of R' and R 2 , which may be the same or different, represents hydrogen or C 1-6 alkyl, X represents a double or triple bond, and each of A and B represents hydrogen when X is a double bond, or both A and B are absent when X is a triple bond, is useful in treating allergic diseases.