摘要:
The present invention relates to a haloalkenyl alkoxymethyl ether compound of the following general formula (1): R1CH2OCH2OCH2CH2CH═CH(CH2)aX1 (1) wherein R1 represents a hydrogen atom, an n-alkyl group having 1 to 9 carbon atoms, or a phenyl group, X1 represents a halogen atom, and “a” represents an integer of 3 to 14. The present invention also relates to processes for preparing a terminal conjugated alkadien-1-yl acetate compound of the following general formula (5): CH2═CHCH═CH(CH2)aOAc (5) wherein “a” is as defined above, and Ac represents an acetyl group, and a terminal conjugated alkadien-1-ol compound of the following general formula (6): CH2═CHCH═CH(CH2)aOH (6) wherein “a” is as defined above, from the haloalkenyl alkoxymethyl ether compound (1).
摘要:
To provide a novel method for producing a halogenated acrylic acid derivative.A compound represented by the formula (1): (wherein each of R1 and R2 which are independent of each other, is a hydrogen atom or a monovalent group essentially containing a carbon atom, or R1 and R2 together form a ring, R3 is a monovalent group capable of being desorbed by R3OH removal reaction, and each of R4 and R5 which are independent of each other, is a hydrogen atom or a monovalent group essentially containing a carbon atom) and having a boiling point of at most 500° C., is subjected to R3OH removal reaction in a vapor phase in the presence of a solid catalyst to obtain an ethene derivative represented by the formula (2): the ethene derivative represented by the formula (2) and a halogenated methane represented by the formula (3): CHXYZ (3) (wherein each of X, Y and Z which are independent of one another, is a halogen atom) are reacted in the presence of a basic compound and a phase transfer catalyst, to obtain a cyclopropane derivative represented by the formula (4): and the cyclopropane derivative represented by the formula (4) is reacted by heating in a liquid phase or in a vapor phase to obtain a halogenated acrylic acid ester derivative represented by the formula (5):
摘要:
The present invention relates to a process of a cis/trans isomerization of an unsaturated compound A being selected from the group consisting of unsaturated ketones, unsaturated ketals, unsaturated aldehydes, unsaturated acetals, unsaturated carboxylic acids, esters of an unsaturated carboxylic acid and amides of an unsaturated carboxylic acid using polythiol as cis/trans isomerization catalyst. It has been observed that the isomerization is very efficient and fast.
摘要:
Compounds of formula (I) are of use in the modulation of Kv3.1, Kv.3.2 and Kv3.3 channels and have utility in the treatment or prevention of related disorders.
摘要:
This invention provides: a compound for accurately forming a carbon nanoring that contains a specific number of organic rings and has a definite diameter; a method for producing the compound; a method for efficiently producing a carbon nanoring; and a cycloparaphenylene obtained by the production method. The carbon nanoring of the present invention is a compound obtained by bonding a specific number of organic ring groups. The method for producing a carbon nanoring of the present invention comprises a modification step wherein a halogen atom in a U-shaped compound is modified into a boron compound, and a coupling step wherein the U-shaped compound is subjected to a coupling reaction. The U-shaped compound is a novel compound that has cyclohexane rings, benzene rings, and specific organic ring groups.
摘要:
A separation apparatus using a membrane for diafiltration, which provides precise fractionation of a target substance by monitoring and regulating permeability of the target substance based on measurement values and analytical values indicating separation status, such as physical values and concentration of a permeate liquid, a circulating liquid and an internal circulating liquid in a membrane device. A diafiltration process including adding a cleaning liquid to an treating liquid which contains multiple target substances and extracting a target substance into the permeate liquid supplied from a membrane separation apparatus to fractionate the target substance from other target substances remaining in a residual liquid. In the present invention, permeability of the target substance is controlled by regulating or controlling at least one operating parameter, such as a flow rate of the permeate liquid, operating pressure and temperature of the membrane separation apparatus, and concentration and amount of a circulating liquid, to a predetermined range based on a separation status index and/or a progress index of a separating operation.
摘要:
A retroviral protease inhibiting compound of the formulaA--X--Bor a pharmaceutically acceptable salt, prodrug or ester thereof, wherein X is a linking group;A is(1) substituted amino,(2) substituted carbonyl,(3) functionalized imino,(4) functionalized alkyl,(5) functionalized acyl,(6) functionalized heterocyclic or(7) functionalized (heterocyclic)alkyl; andB is(1) substituted carbonyl independently defined as herein,(2) substituted amino independently defined as herein,(3) functionalized imino independently defined as herein,(4) functionalized alkyl independently defined as herein,(5) functionalized acyl independently defined as herein,(6) functionalized heterocyclic independently defined as herein or(7) functionalized (heterocyclic)alkyl independently defined as herein.
摘要:
Naphthalene derivatives of the formula: ##STR1## wherein R.sup.1, represents a hydrogen atom, a lower alkyl group or an acyl group; R.sup.2 independently represents a hydrogen atom, a lower alkyl group, a lower alkoxy group, a halogen atom, a cycloalkyl group, a cycloalkylalkyl group, a hydroxyl group, an aryl group which may be substituted, an arylalkyl group whose aryl group may be substituted, a heteroaryl group, or a heteroaryllakyl group; R.sup.3 represents a hydrogen atom, a lower alkyl group, a lower alkenyl group, an aryl group which may have a substituent, an arylalkyl group whose aryl group may be substituted, an arylalkenyl group whose aryl group may be substituted, a cycloalkyl group, an alkoxyalkyl group, a heteroaryl group, a heteroarylalkyl group, a carboxyl group, a carboxyalkyl group, an aminoalkyl group, or a cyano group; R.sup.6 is C.sub.1-6 alkyl; and m is 0 or an integer of from 1 to 2 useful in treating autoimmune diseases are disclosed.
摘要翻译:下式的萘衍生物:其中R 1,表示氢原子,低级烷基或酰基; R2独立地表示氢原子,低级烷基,低级烷氧基,卤素原子,环烷基,环烷基烷基,羟基,可被取代的芳基,芳基可以被取代的芳基烷基 ,杂芳基或杂芳基烷基; R 3表示氢原子,低级烷基,低级烯基,可以具有取代基的芳基,可以被取代芳基的芳基烷基,可以被芳基取代的芳基烯基,环烷基, 烷氧基烷基,杂芳基,杂芳基烷基,羧基,羧基烷基,氨基烷基或氰基; R6是C1-6烷基; 并且公开了m为0或可用于治疗自身免疫性疾病的1〜2的整数。
摘要:
Perfluoropolyethers and perhalogenated chlorofluoroether polymers are disclosed that can be prepared by fluorinating polymers made by the polymerization of acetals, ketals, polyacetals, polyketals and orthoesters with elemental fluorine.
摘要:
A process for the preparation of vitamin A which preferably comprises bringing cyclogeranyl sulphone into contact with a C.sub.10 aldehyde acetal, halogenating the derivative obtained and then removing the halogen group and the sulphone, removing the acetal group and isomerizing the retinal obtained to the desired configuration. Also disclosed are compounds useful as intermediates in the synthesis of vitamin A and processes for preparation of these intermediate compounds.