摘要:
A method for producing 2,6-dihydroxybenzoic acid, which comprises heating an aqueous solution which contains a mixture of 2,6-dihydroxybenzoic acid and 2,4-dihydroxybenzoic acid and has a pH value of 4 or more, to selectively decompose 2,4-dihydroxybenzoic acid, and separating 2,6-dihydroxybenzoic acid from the decomposition reaction mixture.
摘要:
A process for producing 2-methyl-1,3-cyclohexanedione which comprises subjecting 1,3-cyclohexanedione, formaldehyde and a dialkylamine to Mannich reaction to obtain a 2-dialkylaminomethyl-1,3-cyclohexanedione, and subjecting the 2-dialkylaminomethyl to hydrogenolysis, and a process for producing 2-methylresorcinol which comprises aromatizing 2-methyl-1,3-cyclohexanedione obtained. According to these processes, it is possible to produce high-purity 2-methylresorcinol and 2-methyl-1,3-cyclohexanedione commercially easily and advantageously.
摘要:
A method for producing 1,4-dihydroxy-2-naphthoic acid which comprises the steps of: subjecting 1,4-dihydroxynaphthalene into an alkali metal salt formation reaction in an organic medium capable of dissolving 1,4-dihydroxynaphthalene using an alkali metal alcoholate; and subjecting the salt formation reaction mixture to carboxylation using carbon dioxide gas.
摘要:
An anthrapyridone compound of the following formula (I), which is useful for coloring synthetic resins: ##STR1## wherein Q is --NH.sub.2, --NHCH.sub.3 or --NHCOZ where Z is phenyl or alkyl which may be substituted; X.sub.1, X.sub.2 and X.sub.3 are each hydrogen, halogen, alkyl, alkoxy, hydroxy, --NHCOR.sup.1, --CONR.sup.2 R.sup.3 m --COR.sup.4, --COOR.sup.5, --SO.sub.2 R.sup.6 or --SO.sub.2 NR.sup.7 R.sup.8 where R.sup.1 and R.sup.4 are each C.sub.1-4 alkyl, R.sup.2 and R.sup.3 are each hydrogen or C.sub.1-4 alkyl, R.sup.5 and R.sup.6 are each alkyl or hydroxyalkyl and R.sup.7 and R.sup.8 are each hydrogen or C.sub.1-4 alkyl, with proviso that when Q is --NHCH.sub.3, X.sub.1, X.sub.2 and X.sub.3 are each hydrogen, halogen, alkoxy, hydroxy, --NHCOR.sup.1, --CONR.sup.2 R.sup.3, --COR.sup.4, --COOR.sup.5, --SO.sub.2 R.sup.6 or --SO.sub.2 NR.sup.7 R.sup.8.Process for producing the anthrapyridone compound is also provided.
摘要:
A turquoise blue reactive dye represented by a free acid of the formula, ##STR1## wherein [CuPc] is a copper phthalocyanine nucleus, W is ##STR2## in which R.sub.1 and R.sub.2 are each a hydrogen atom or a methyl group and i is an integer of 2 to 6 both inclusive, Y.sub.1 and Y.sub.2 are each a hydrogen atom, a methyl, methoxy or sulfonic acid group, l and m are each a number of 0 to 3, and n is a number of 1 to 3, provided that l+m+n is not more than 4.This dye is suitable for dyeing cellulose fibers to produce a turquoise blue dyed product superior in fastnesses, acid stability, build-up property, level dyeing property, and low-temperature dyeability.
摘要翻译:由下式游离酸代表的绿松石蓝色活性染料其中[CuPc]是铜酞菁核,W是其中R 1和R 2各自是氢原子或甲基,且i是 2〜6的整数,Y 1和Y 2各自为氢原子,甲基,甲氧基或磺酸基,l和m各自为0〜3,n为1〜3的数,条件是 l + m + n不大于4.这种染料适用于染色纤维素纤维,以生产出坚固耐性,酸稳定性,增强性能,水平染色性能和低温可染性优越的绿松石蓝染色产品。
摘要:
The present invention is directed to a method for preparing 2-amino-6-chloropurine having a double cone-like crystal form, comprising the steps of: (A) suspending 2-amino-6-chloropurine having an acicular or irregular-shaped crystal form in a liquid consisting essentially of water having a pH of from 3 to 10; and (B) heating the resulting suspension at a temperature of from 70.degree. to 100.degree. C. to complete the double cone-like crystal form conversion.
摘要:
A red reactive dye represented by a free acid of the formula, ##STR1## wherein X is a hydrogen atom, a methyl, methoxy or sulfonic acid group, Y is --CH.dbd.CH.sub.2, --CH.sub.2 CH.sub.2 Y.sub.1 or --CH.sub.2 CH.sub.2 OY.sub.2 (in which Y.sub.1 is a halogen atom, and Y.sub.2 is the residue of polybasic acids), R is a C.sub.1 -C.sub.4 alkyl group, R.sub.1 and R.sub.2 are each a hydrogen atom, a methyl or ethyl group, and the azo group is located on a meta-or para-position of the benzene ring A with respect to the --NR.sub.2 -- group and the sulfonic acid group on the benzene ring A is adjacent to the azo group. This dye is suitable for dyeingcellulose fibers red to afford dyeings superior in fastnesses, acid stability, build-up property, level dyeing property and white dischargeability.
摘要翻译:由下式游离酸代表的红色活性染料,其中X是氢原子,甲基,甲氧基或磺酸基,Y是-CH = CH 2,-CH 2 CH 2 Y 1或-CH 2 CH 2 OY 2(其中 Y1是卤素原子,Y2是多元酸的残基),R是C1-C4烷基,R1和R2各自是氢原子,甲基或乙基,偶氮基位于元 - 或苯环A相对于-NR2-基的对位,苯环A上的磺酸基与偶氮基相邻。 这种染料适用于红色染色纤维素纤维,以提供优异的耐晒牢度,酸稳定性,增强性能,水平染色性能和白色放电性能的染色。
摘要:
The present invention relates to a production method of 4′-bromomethyl-2-cyanobiphenyl, which includes reacting 4′-methyl-2-cyanobiphenyl with bromine in the presence of a radical initiator and an oxidant. According to the present invention, since bromine can be regenerated by reacting hydrogen bromide, which is by-produced with the progress of bromination, with an oxidant, inhibition of bromination by hydrogen bromide, coloring by bromine and the like can be prevented. Thus, 4′-bromomethyl-2-cyanobiphenyl useful as a starting material of pharmaceutical products can be produced industrially beneficially.
摘要:
A methine compound represented by the following formula and an agent containing the same for coloring resins such as polystyrene, ABS. ##STR1## wherein R.sup.1 is a hydrogen atom, a lower alkyl group, a lower alkoxy group, a nitro group or a lower carboxylic ester group; R.sup.2 is a lower alkyl group, a lower carboxylic amide group or a lower carboxylic ester group; and X is --SO.sub.2 NR.sup.3 R.sup.4, --SO.sub.2 NCHNR.sup.5 R.sup.6 or --SO.sub.2 R.sup.7, where R.sup.3 and R.sup.4 each is a hydrogen atom, a lower alkyl group or a phenyl group, R.sup.5 and R.sup.6 each is a lower alkyl group, and R.sup.7 is a lower alkyl group or a hydroxyethyl group.
摘要:
An anthrapyridone compound of the following formula (I) and which is useful for coloring resins: ##STR1## wherein X.sup.1 is hydrogen, --NHCOR.sup.1, --CONR.sup.2 R.sup.3, --COR.sup.4, --SO.sub.2 R.sup.5 or --SO.sub.2 NR.sup.6 R.sup.7, in which R.sup.1 and R.sup.4 are each C.sub.1-4 alkyl, R.sup.2 and R.sup.3 are each hydrogen or C.sub.1-4 alkyl, R.sup.5 is C.sub.1-4 alkyl or hydroxyethyl, R.sup.6 and R.sup.7 are each hydrogen or C.sub.1-4 alkyl, X.sup.2 is hydrogen or imidomethyl of the formula (II): ##STR2## wherein n is a number of 1 to 2, X.sup.4 is hydrogen or carboxylic acid C.sub.1-4 alkyl-ester, X.sup.3 is hydrogen, halogen, hydroxyl, C.sub.1-4 alkyl or C.sub.1-4 alkoxyl, with the proviso that X.sup.1 is --NHCOR.sup.1, --CONR.sup.2 R.sup.3, --COR.sup.4, --SO.sub.2 R.sup.5 or --SO.sub.2 NR.sup.6 R.sup.7 when X.sup.2 is hydrogen, X.sup.2 is the imidomethyl of the formula (II) when X.sup.1 is the hydrogen, is provided, which is prepared by allowing the .alpha.-halonathraquinone compound with an acylated primary aromatic amine compound in a nonaqueous medium in the presence of metallic copper or a copper compound.
摘要翻译:用于着色树脂的下式(I)的蒽并吡啶酮化合物:其中X 1是氢,-NHCOR 1,-CONR 2 R 3,-COR 4,-SO 2 R 5或-SO 2 NR 6 R 7,其中R 1和R 4是 每个C 1-4烷基,R 2和R 3各自为氢或C 1-4烷基,R 5为C 1-4烷基或羟乙基,R 6和R 7各自为氢或C 1-4烷基,X 2为氢或式(II)的亚氨基甲基) :其中n为1至2的数,X 4为氢或羧酸C 1-4烷基酯,X 3为氢,卤素,羟基,C 1-4烷基或C 1-4烷氧基,其中 条件是当X 2是氢时,X 1是-NHCOR 1,-CONR 2 R 3,-COR 4,-SO 2 R 5或-SO 2 NR 6 R 7,X 2是当X1是氢时式(II)的亚氨基甲基,其通过使α - 在金属铜或铜化合物的存在下,在非水介质中使用具有酰化伯芳香胺化合物的卤代萘醌化合物。