摘要:
A process for the preparation of acetals and ketals by reacting an aldehyde or ketone with an alcohol in the presence of an acidic catalyst and removing water by pervaporation. Manufacturing equipment for the preparation of acetals and ketones is also provided.
摘要:
Improved water resistant acetal sizing agents including 1,1-octadecoxyoctadecane are provided along with methods for their synthesis including methods in which C8 to C30 alkyl bromides are reacted with a polyol under basic conditions and those in which a C8 to C30 primary alcohol is reacted with an organic base in the presence of a suitable oxidizing agent under basic conditions.
摘要:
Bicycloheptene compounds represented by general formula (1) and being useful as intermediates for the production of agricultural chemicals or drugs (wherein X is hydroxycarbonyl, hydroxymethyl, halogenomethyl, nitromethyl, or methylthiomethyl); and a process for the preparation of compounds of general formula (1), characterized by reacting 5,5-dimethoxy-1,2,3,4-tetrachlorocyclopentadiene with a compound represented by general formula (2) (wherein X is as defined above)
摘要:
The present invention relates to a method of catalyzing etherification, esterification, hydration, ether cleavage, isomerization alkylation, or other reactions which are catalyzable with an acid or molecular sieve catalyst. Said reactions are conducted using a novel, dual functional catalyst prepared with active components and a small amount of binder, wherein said dual functional catalyst comprises cylindrical pellets which are molded such that a cross-section or each pellet has a window lattice shape with external teeth, or a star shape with inner spokes.
摘要:
The present invention provides a process whereby fluorinated ketones of various structures can be produced by short process steps and which is useful as an industrial production process. Namely, it is a process for producing a fluorinated ketone of the following formula (5), which comprises reacting a compound of the following formula (3) having a fluorine content of at least 30 mass %, with fluorine in a liquid phase to obtain a compound of the following formula (4), and then, subjecting the ester linkage of the compound of the formula (4) to a dissociation reaction: RCCOOCHRARB (3) RCFCOOCFRAFRBF (4) RAFRBFC═O (5) wherein each of RA and RAF are each a monovalent organic group such as an alkyl group, or RA and RB may be bonded to each other to form a bivalent organic group such as an alkylene group, RAF and RBF are a monovalent organic group such as a perfluoroalkyl group formed by fluorination of RA and RB, or they are bonded to each other to form a bivalent organic group such as a perfluoroalkylene group, and RC and RCF are each a monovalent organic group such as a perfluoroalkyl group which may contain an etheric oxygen atom.
摘要翻译:本发明提供了一种方法,其中各种结构的氟化酮可以通过短的工艺步骤制备,并且可用作工业生产方法。名义上,它是一种制备下式(5)的氟化酮的方法,其包括 使具有至少30质量%的氟含量的下式(3)的化合物与氟在液相中反应,得到下式(4)的化合物,然后将化合物 式(4)解离反应:其中R A和R A各自各自为一价有机基团,例如烷基,或者R和R可彼此键合 为了形成二价有机基团,例如亚烷基,R AF和R BF均为一价有机基团,例如通过R A和R B的氟化形成的全氟烷基,或者它们键合到 彼此形成二价有机基团,例如全氟亚烷基基团,和R a a d R CF各自为可以含有醚性氧原子的一价有机基团,例如全氟烷基。
摘要:
An adamantanemethanol derivative of the invention is represented by the following formula (1), wherein Ra is a hydrogen atom or a hydrocarbon group; Rb is a hydrocarbon group having a carbon atom, to which carbon atom at least one hydrogen atom is bonded, at a bonding site with the adjacent carbon atom; Rc, Rd and Re are each a hydrogen atom, a hydroxyl group which may be protected by a protective group or the like; provided that a hydroxyl group protected by a protective group or the like is bonded to at least one carbon atom constituting the adamantane skeleton when Ra is a hydrogen atom or a methyl group and Rb is a methyl group; and at least one substituent, in addition to the HO—C(Ra)(Rb)— group indicated in the formula (1), is bonded to the adamantane ring when one of Ra and Rb is a methyl group and the other is an ethyl group.
摘要:
A method for fluoromethylation of a halogenated alcohol. The method includes refluxing a halogenated alcohol with a dihalomethane under basic conditions in a first solvent to form a halomethyl ether and fluorinating the halomethyl ether in the presence of a fluorinating agent.
摘要:
New phenolic compounds of formula (I) R=C3-C17 dialkoxymethyl group, 1,3-dioxolan-2-yl group optionally substituted on peaks 4 and/or 5 by one or more C1-C8 alkyls or 1,3-dioxan-2-yl group optionally substituted on peaks 4 and/or 5 and/or 6 by one or more C1-C8 alkyls. n=1, 2 or 3, the group or groups are in o and/or p position of the OH of the cycle m=from 0 to 4-n, X=functional group such as OH or Hal or C1-C8 alkyl or alkoxy group or C5-C12 aryl group and optionally 1 or 2 heteroatoms such as N or O, or carboxy or —CO—Y group where Y=C1-C8 alkyl or alkoxy or amido or amino or thiol group, on condition that at least one of the ortho or para positions of the phenolic cycle is substituted by a hydrogen, and their salts with the alkali metals, alkaline-earth metals and amines.
摘要:
2-Chloro-1,1,1-trialkoxyethane of formula (II): wherein R1 to R3, which may be the same or different, are alkyl, or any two of the alkyl groups taken together form a cyclic group, is prepared by reacting 1,1,1-trialkoxyethane with gaseous or liquid chlorine in the presence of alcohol solvent in an amount ranging from 0.1% to 20 wt %, based on the amount of 1,1,1-trialkoxyethane reactant.
摘要:
A process is described for preparing diacetals of glyoxal by reacting from 40 to 75% by weight aqueous glyoxal with monohydric alcohols in the presence of an acid catalyst, which comprises leaving a liquid mixture which, at the beginning of the reaction, comprises alcohol and glyoxal in a molar ratio of at least 15:1 and also water in a concentration of not more than 8% by weight in contact with the acid catalyst until concentration in the reaction mixture of the diacetal formed reaches at least 70% of the equilibrium concentration without more than 5% by weight of the alcohol used having already been distilled off.