Provided is a method for producing, in an industrially advantageous manner, an acid addition salt of an organic sulfonic acid and a 4-amino-2-halobenzonitrile compound. An acid addition salt of an organic sulfonic acid and a 4-amino-2-halobenzonitrile compound represented by formula (2) is produced. A production method according to the present invention includes a separation step for, by using a method in which the solubility difference between acid addition salts of isomers in a solvent is used, separating, from acid addition salts of an organic sulfonic acid and an isomer mixture of compounds represented by formula (1) with at least a compound represented by formula (2) being included in the acid addition salts, an acid addition salt of the compound represented by formula (2) and the organic sulfonic acid. (In the formulas, X denotes a halogen atom, R1 denotes a substituent that is inert to the reaction, and n denotes an integer of 0-3.)
C07C 231/06 - Preparation of carboxylic acid amides from nitriles by transformation of cyano groups into carboxamide groups
C07C 237/30 - Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups having the carbon atom of at least one of the carboxamide groups bound to a carbon atom of a non-condensed six-membered aromatic ring of the carbon skeleton having the nitrogen atom of the carboxamide group bound to hydrogen atoms or to acyclic carbon atoms
C07C 255/58 - Carboxylic acid nitriles having cyano groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing cyano groups and singly-bound nitrogen atoms, not being further bound to other hetero atoms, bound to the carbon skeleton
C07C 309/30 - Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton of non-condensed six-membered aromatic rings of six-membered aromatic rings substituted by alkyl groups
2.
NAPHTHALENEDITHIOL AND DERIVATIVE THEREOF, AND PRODUCTION PROCESS AND USE FOR THE SAME
Provided are a naphthalenedithiol or a derivative thereof that can achieve both high refractive index and high dissolubility (compatibility), and a process for producing the same and a use therefor. A naphthalene compound of the present invention is represented by the formula (1):
Provided are a naphthalenedithiol or a derivative thereof that can achieve both high refractive index and high dissolubility (compatibility), and a process for producing the same and a use therefor. A naphthalene compound of the present invention is represented by the formula (1):
wherein R1 and R2 independently represent a hydrogen atom or a substituent, R3 represents a substituent, and n denotes an integer of 0 to 6.
Provided are a naphthalenedithiol or a derivative thereof that can achieve both high refractive index and high dissolubility (compatibility), and a process for producing the same and a use therefor. A naphthalene compound of the present invention is represented by the formula (1):
wherein R1 and R2 independently represent a hydrogen atom or a substituent, R3 represents a substituent, and n denotes an integer of 0 to 6.
At least one of R1 and R2 may represent the substituent. The naphthalene compound of the formula (1) may be dissolved in or mixed with an organic solvent to prepare a mixture (or blend); a curable composition containing the naphthalene compound of the formula (1) may be prepared; a resin of the present invention at least contains a constituent unit represented by the formula (1P):
Provided are a naphthalenedithiol or a derivative thereof that can achieve both high refractive index and high dissolubility (compatibility), and a process for producing the same and a use therefor. A naphthalene compound of the present invention is represented by the formula (1):
wherein R1 and R2 independently represent a hydrogen atom or a substituent, R3 represents a substituent, and n denotes an integer of 0 to 6.
At least one of R1 and R2 may represent the substituent. The naphthalene compound of the formula (1) may be dissolved in or mixed with an organic solvent to prepare a mixture (or blend); a curable composition containing the naphthalene compound of the formula (1) may be prepared; a resin of the present invention at least contains a constituent unit represented by the formula (1P):
wherein R3 represents a substituent, and n denotes an integer of 0 to 6.
C07C 327/26 - Esters of monothiocarboxylic acids having carbon atoms of esterified thiocarboxyl groups bound to carbon atoms of six-membered aromatic rings
C07C 321/20 - Sulfides, hydropolysulfides, or polysulfides having thio groups bound to acyclic carbon atoms of an unsaturated carbon skeleton containing rings
C07D 407/12 - Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group containing two hetero rings linked by a chain containing hetero atoms as chain links
C08L 41/00 - Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a bond to sulfur or by a heterocyclic ring containing sulfurCompositions of derivatives of such polymers
3.
1,6-NAPHTHALENEDITHIOL PRODUCT AND PROCESS FOR PRODUCING THE SAME
Provided are a naphthalenedithiol (or a naphthalenedithiol product) having a high purity and a reduced coloration, and a process for producing the same.
Provided are a naphthalenedithiol (or a naphthalenedithiol product) having a high purity and a reduced coloration, and a process for producing the same.
A 1,6-naphthalenedithiol (a 1,6-naphthalenedithiol product) according to the present invention has a purity of not less than 99.5% and a polymeric 1,6-naphthalenedithiol content of not more than 0.2%, each determined by high performance liquid chromatography using area normalization; and has a Gardner color scale in a molten state of not more than 1. The polymeric 1,6-naphthalenedithiol may be a disulfide form as a dimeric 1,6-naphthalenedithiol. Such a 1,6-naphthalenedithiol product can be produced by distilling a crude raw material containing 1,6-naphthalenedithiol and at least a polymeric 1,6-naphthalenedithiol to obtain a distillate fraction containing 1,6-naphthalenedithiol. The crude raw material may be a dry solid of a crudely purified product of 1,6-naphthalenedithiol from a reaction mixture.
The present invention provides: a naphthalenedithiol which has high purity, while being reduced in the degree of coloring; and a method for producing this naphthalenedithiol. 1,6-naphthalenedithiol according to the present invention has a purity of 99.5% or more in terms of area percentage by means of high-speed liquid chromatography; the content of multimers of 1,6-naphthalenedithiol is 0.2% or less; and this 1,6-naphthalenedithiol has a Gardner color number of 1 or less in a molten state. The multimers of 1,6-naphthalenedithiol may be disulfide dimers. This 1,6-naphthalenedithiol can be produced by subjecting a crude starting material, which contains 1,6-naphthalenedithiol and at least multimers of 1,6-naphthalenedithiol, to distillation so as to distill a fraction that contains 1,6-naphthalenedithiol. The crude starting material may be a solid dried product of a partially purified 1,6-naphthalenedithiol product that is obtained by purification from a reaction mixture.
Provided are: a naphthalene dithiol capable of achieving both high refractive index and high solubility (compatibility) or a derivative thereof; and a production method and a use for the same. A naphthalene compound according to the present invention is represented by formula (1). (In the formula, R1and R2each independently indicate a hydrogen atom or a substituent, R3indicates a substituent, and n indicates an integer of 0-6.) At least one of R1and R2can be the substituent. The naphthalene compound represented by formula (1) can be dissolved in or mixed with an organic solvent to prepare a mixture (or a solution). A curable composition including the naphthalene compound represented by formula (1) can be prepared. A resin according to the present invention includes at least a structural unit represented by formula (1P). (In the formula, R3 indicates a substituent, and n indicates an integer of 0-6.)
C07C 319/14 - Preparation of thiols, sulfides, hydropolysulfides or polysulfides of sulfides
C07C 321/28 - Sulfides, hydropolysulfides, or polysulfides having thio groups bound to carbon atoms of six-membered aromatic rings
C07C 323/21 - Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and singly-bound oxygen atoms bound to the same carbon skeleton having the sulfur atom of at least one of the thio groups bound to a carbon atom of a six-membered aromatic ring of the carbon skeleton with the sulfur atom of the thio group bound to a carbon atom of a six-membered aromatic ring being part of a condensed ring system
C07C 323/62 - Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atom of at least one of the thio groups bound to a carbon atom of a six-membered aromatic ring of the carbon skeleton
C07C 323/64 - Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and sulfur atoms, not being part of thio groups, bound to the same carbon skeleton
C07C 327/22 - Esters of monothiocarboxylic acids having carbon atoms of esterified thiocarboxyl groups bound to hydrogen atoms or to acyclic carbon atoms
C07D 303/34 - Compounds containing oxirane rings with hydrocarbon radicals, substituted by sulfur, selenium, or tellurium atoms
C08G 59/30 - Di-epoxy compounds containing atoms other than carbon, hydrogen, oxygen, and nitrogen
C08G 59/40 - Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups characterised by the curing agents used
Provided is method of producing 6-bromo-2-naphthoic acid useful as a raw material in pharmaceuticals, agricultural chemicals, etc. This 6-bromo-2-naphthoic acid production method involves reacting 6-hydroxy-2-naphthoic acid with ammonia in the presence of sulfite or bisulfite to obtain 6-amino-2-naphthoic acid, subjecting the obtained 6-amino-2-naphthoic acid to a diazotization reaction to obtain a diazotized compound, and subsequently reacting the diazotized compound with copper bromide in the presence of an acid. By means of the present invention, it is possible to produce 6-bromo-2-naphthoic acid with high yield and high purity at low cost.
C07C 51/363 - Preparation of carboxylic acids or their salts, halides, or anhydrides by reactions not involving formation of carboxyl groups by introduction of halogenPreparation of carboxylic acids or their salts, halides, or anhydrides by reactions not involving formation of carboxyl groups by substitution of halogen atoms by other halogen atoms
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