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41. 发明授权

US5179230A Process for the preparation of 2,3,4,5-tetrafluorobenzoic acid 失效
标题翻译：制备2,3,4,5-四氢叶酸的方法
公开(公告)号：US5179230A
公开(公告)日：1993-01-12
申请号：US872059
申请日：1992-04-23
申请人： Theodor Papenfuhs , Ralf Pfirmann
发明人： Theodor Papenfuhs , Ralf Pfirmann
IPC分类号： C07C51/00 , C07C51/06 , C07C63/70
CPC分类号： C07C51/44 , C07C51/38
摘要： A process for the preparation of 2,3,4,5,-tetrafluorobenzoic acid of the formula (1) ##STR1## by heating N'-substituted N-aminotetrafluorophthalimides of the formula (2) ##STR2## in which X is the radical ##STR3## where R.sub.1, R.sub.2 are a hydrogen atom, an alkyl-(C.sub.1 -C.sub.10)- group, aryl group, alkyl-(C.sub.1 -C.sub.6)-Co- group or aryl-CO- group, it being possible for the aryl or aryl-CO- group in the case of R.sub.1 and R.sub.2 to be substituted on the aromatic ring by fluorine and/or chlorine atoms and/or alkyl-(C.sub.1 -C.sub.4)-groups, or R.sub.1 and R.sub.2 together are a phthaloyl radical which can be substituted on the aromatic ring by 4 chlorine atoms or 4 fluorine atoms, or where X is the radical ##STR4## which can be substituted on the aromatic ring by fluorine and/or chlorine atoms and/or alkyl-(C.sub.1 -C.sub.4)- groups, in an aqueous medium at pH values of approximately -1 to approximately +1 at temperatures of approximately 160 to approximately 220.degree. C.
摘要翻译：通过加热式（2）的N-取代的N-氨基四氟邻苯二甲酰亚胺（2）制备式（1）的2,3,4,5-四氟苯甲酸的方法（1）其中X是基团，其中R 1，R 2是氢原子，烷基 - （C 1 -C 10） - 基，芳基，烷基 - （C 1 -C 6） - 基或芳基-CO-基团， R 1和R 2在芳环上被氟和/或氯原子和/或烷基 - （C 1 -C 4） - 基团取代时，芳基或芳基-CO-基团是有可能的，或者R1和R2 一起是可以在芳环上被4个氯原子或4个氟原子取代的邻苯二甲酰基，或其中X是可以在芳环上被氟和/或氯原子和/或烷基取代的基团 - （C1-C4） - 基团，在约160至约220℃的温度下，pH值约为-1至约+ 1的水性介质中。

42. 发明授权

US5151532A Process for the production of high-purity tetrachloro-1,4-benzoquinone 失效
标题翻译：生产高纯度四氯丙烯-1,4-苯并噻唑酮的方法
公开(公告)号：US5151532A
公开(公告)日：1992-09-29
申请号：US724499
申请日：1991-06-27
申请人： Otto Arndt , Theodor Papenfuhs
发明人： Otto Arndt , Theodor Papenfuhs
IPC分类号： C07C50/24 , C07C37/62 , C07C45/00 , C07C46/00 , C07C46/06 , C07C67/00
CPC分类号： C07C46/00 , C07C37/62 , C07C46/06
摘要： A process for the preparation of high-purity tetrachloro-1,4-benzoquinone by the action of hydrogen peroxide and hydrochloric acid on hydroquinone, which comprises causing 3.8 top 4.2 times the molar quantity of 30 to 37% hydrochloric acid and 1.9 to 2.1 times the molar quantity of 50 to 35% hydrogen peroxide, to act at 5 to 50.degree. C. on 1 mole of hydroquinone in at least 12 times the molar quantity of 30 to 37% hydrochloric acid, then heating the resulting suspension, which essentially contains 2,5-dichlorohydroquinone, to 45 to 55.degree. C. and again causing to act on it, at 50 to 95.degree. C., 3.8 to 4.2 times the molar quantity of 30 to 37% hydrochloric acid and 1.9 to 2.1 times the molar quantity of 50 to 35% hydrogen peroxide, in each case based on the hydroquinone used, and finally adding to the suspension, which is now essentially composed of trichloro-1,4-benzoquinone, 1.9 to 2.1 times the molar quantity of hydrochloric acid of the said concentration range, and 0.95 to 1.05 times the molar quantity of hydrogen peroxide of the said concentration range, in each case based on the hydroquinone used, at 95 to 115.degree. C., sufficiently slowly for no chlorine to escape.
摘要翻译：一种通过过氧化氢和盐酸对氢醌的作用制备高纯度四氯-1,4-苯醌的方法，其包括使3.8倍上升4.2倍摩尔量的30至37％盐酸和1.9至2.1倍摩尔量为50至35％的过氧化氢，以5至50℃在1摩尔氢醌中至少12倍摩尔量的30至37％盐酸作用，然后加热得到的悬浮液，其基本上含有 2,5-二氯对苯二酚，至45至55℃，并再次引起其作用，在50至95℃，摩尔量为30至37％盐酸的3.8至4.2倍，摩尔数的1.9至2.1倍数量为50〜35％的过氧化氢，在各种情况下都是以所使用的氢醌为基准，最后加入到现在基本上由三氯-1,4-苯醌组成的悬浮液中，盐酸的摩尔量为1.9〜2.1倍该浓度范围为0.95〜1.05倍所述浓度范围内的摩尔量的过氧化氢，在每种情况下，基于所使用的氢醌，在95至115℃下，足够缓慢地没有氯逸出。

43. 发明授权

US5149850A Process for the production of high-purity tetrachloro-1,4-benzoquinone 失效
标题翻译：生产高纯度四氯丙烯-1,4-苯并噻唑酮的方法
公开(公告)号：US5149850A
公开(公告)日：1992-09-22
申请号：US726625
申请日：1991-06-28
申请人： Otto Arndt , Theodor Papenfuhs
发明人： Otto Arndt , Theodor Papenfuhs
IPC分类号： C07C37/62 , C07C45/00 , C07C46/00 , C07C46/06 , C07C50/24 , C07C67/00
CPC分类号： C07C46/00 , C07C37/62 , C07C46/06
摘要： A process for the production of high-purity tetrachloro-1,4-benzoquinone by the action of chlorine and hydrochloric acid on hydroquinone which comprises causing 1.9 to 2.1 times the molar quantity of gaseous chlorine to act at temperatures from 5.degree. to 15.degree. C. on 1 mol of hydroquinone in 6 to 7 times the molar quantity of 30 to 37% hydrochloric acid, then diluting the resulting suspension, essentially containing 2,5-dichlorohydroquinone, with 2 to 3 parts of water, relative to hydroquinone employed, and initially warming to a temperature from 20.degree. to 30.degree. C., subsequently introducing 1.9 to 2.1 times the molar quantity of chlorine gas in an air atmosphere while raising the temperature to 90.degree.-100.degree. C. with simultaneous dilution with 3.5 to 4.5 parts of water, relative to hydroquinone employed, and finally introducing 1 to 2 times the molar quantity of gaseous chlorine, relative to hydroquinone employed, at temperatures from 100.degree. to 115.degree. C.
摘要翻译：通过氯和盐酸对氢醌的作用生产高纯度四氯-1,4-苯醌的方法，其包括使气态氯的摩尔量的1.9至2.1倍在5至15℃的温度下起作用在1摩尔氢醌中的摩尔量为30至37％盐酸的6至7倍，然后相对于所用氢醌将所得悬浮液（基本上含有2,5-二氯对苯二酚）稀释至2至3份水，和最初升温至20℃至30℃，随后将空气气氛中的氯气的摩尔量引入1.9至2.1倍，同时将温度升至90℃-100℃，同时用3.5至4.5份稀释的水，相对于所使用的氢醌，并且最终在100-115℃的温度下，相对于所用的氢醌，引入1至2倍的气态氯的摩尔量。

44. 发明授权

US5087725A Process for the preparation of alkyl nitrobenzoates 失效
标题翻译：制备硝基苯甲酸烷基酯的方法
公开(公告)号：US5087725A
公开(公告)日：1992-02-11
申请号：US513661
申请日：1990-04-24
申请人： Theodor Papenfuhs , Reiner Hess , Andreas Fuss
发明人： Theodor Papenfuhs , Reiner Hess , Andreas Fuss
IPC分类号： B01J31/02 , C07B61/00 , C07C201/12 , C07C205/57
CPC分类号： C07C201/12
摘要： A process for the preparation of alkyl (C.sub.1 -C.sub.3) nitrobenzoates by reacting the nitrobenzoic acid to be esterified with an excess of about 300 to about 600 mol % of an alkanol (C.sub.1 -C.sub.3) in a solvent which is inert towards the starting compounds and the reaction product in the presence of a polyfluoroalkanesulfonic acid of the general formula (1)Y(C.sub.n F.sub.2n)SO.sub.3 H (1)in which Y is a hydrogen or fluorine atom, with the proviso that, if Y is H, this hydrogen atom is in the .beta.-position relative to the sulfo group, or the hydrate thereof as catalyst in an amount of about 0.1 to about 20 mol %, relative to the nitrobenzoic acid used, at temperatures from about 60.degree. to about 120.degree. C.
摘要翻译：通过在对起始化合物是惰性的溶剂中使待酯化的硝基苯甲酸与过量约300至约600mol％的链烷醇（C1-C3）反应制备烷基（C 1 -C 3）硝基苯甲酸酯的方法和其中Y为氢或氟原子的通式（1）Y（C n F 2n）SO 3 H（1）的多氟烷基磺酸存在下的反应产物，条件是如果Y为H，则该氢原子为相对于所使用的硝基苯甲酸，在相对于磺基的β-位或其水合物作为催化剂的量为约0.1至约20mol％，温度为约60℃至约120℃。

45. 发明授权

US4960940A Bis(hydroxyethylsulfonylmethyl)anilines and a process for their preparation 失效
标题翻译：双（羟乙基磺酰基甲基）苯胺及其制备方法
公开(公告)号：US4960940A
公开(公告)日：1990-10-02
申请号：US251469
申请日：1988-09-29
申请人： Theodor Papenfuhs , Josef Geisenberger
发明人： Theodor Papenfuhs , Josef Geisenberger
IPC分类号： C07C323/29 , B01J23/30 , C07B61/00 , C07C67/00 , C07C313/00 , C07C315/00 , C07C315/02 , C07C317/04 , C07C317/26 , C07C317/28 , C07C317/36 , C07C321/12
CPC分类号： C07C321/00 , C07C317/00
摘要： A process for the preparation of compounds of the formula ##STR1## in which the side chains --CH.sub.2 --SO.sub.2 --CH.sub.2 --CH.sub.2 --OH are in the ortho-, meta- or para-position relative to one another and the amino group is in the 4-position in the case where the two side chains are in the 1,2- or 1,3-position, by reacting 1 mol of xylylene dichloride with at least 2 mol of mercaptoethanol at 40.degree.-150.degree. C. in an aqueous medium in the presence of an acid-binding agent to give the corresponding compound of the formula ##STR2## oxidizing this product with at least 4 mol of hydrogen peroxide at 50.degree.-120.degree. C. at a pH
摘要翻译：制备式“IMAGE”的化合物的方法，其中侧链-CH2-SO2-CH2-CH2-OH相对于彼此的邻位，间位或对位，氨基位于在两个侧链处于1,2-或1,3-位的情况下，通过使1摩尔二氯化亚甲基苯与至少2摩尔巯基乙醇在40-150℃下反应，在4-位上水性介质中，在酸结合剂存在下，得到相应的式“IMAGE”化合物，在50℃-120℃下，用至少4mol过氧化氢在pH < 钨（VI）化合物转化成式（IMAGE）化合物，将该产物用无水硫酸在30°-45℃下转化成相应的双（硫酸酯），用0％的高百分比硝酸将其硝化 -60℃，得到双（硫酸乙基磺酰基甲基）硝基苯，加水后加水，使该产物水解减少。

46. 发明授权

US4960929A Hydroxyethylsulfonylnitro- and hydroxyethylsulfonylamino-benzoic acids and processes for their preparation 失效
标题翻译：羟乙基磺酰基硝基和羟基磺酰氨基苯甲酸及其制备方法
公开(公告)号：US4960929A
公开(公告)日：1990-10-02
申请号：US257741
申请日：1988-10-13
申请人： Theodor Papenfuhs
发明人： Theodor Papenfuhs
IPC分类号： C07C313/00 , C07C67/00 , C07C315/02 , C07C317/44 , C07C317/48
CPC分类号： C07C317/44
摘要： A process for the preparation of compounds of the formula (5) ##STR1## in which R denotes a hydrogen or oxygen atom and the --N(R).sub.2 group and the hydroxyethylsulfonyl group are in the ortho- or para-position relative to one another by converting 1 mol of a halonitrobenzoic acid of the formula (2) ##STR2## in which X denotes a fluorine, chlorine, bromine or iodine atom and the nitro group and the halogen atom are in the ortho- or para-position relative to one another, with at least 1 mol of mercaptoethanol in an aqueous solution or suspension or in an organic solvent in the presence of an acid-binding agent at temperatures from about 20.degree. to about 100.degree. C., to the corresponding hydroxyethylmercaptonitrobenzoic acid of the formula (3) ##STR3## oxidizing these acids in a manner known per se to the corresponding hydroxyethylsulfonylnitrobenzoic acids of the formula (5) (R.dbd.0) mentioned and reducing the latter, if necessary, in a manner known per se to the corresponding hydroxyethylsulfonylaminobenzoic acids of the general formula (4) ##STR4## in which the amino and hydroxyethylsulfonyl group are in the ortho- or para-position relative to one another.
摘要翻译：制备式（5）化合物的方法（5）其中R表示氢或氧原子，-N（R）2基团和羟乙基磺酰基在邻位或对位通过转化1mol的式（2）的卤代硝基苯甲酸，其中X表示氟，氯，溴或碘原子，硝基和卤素原子在邻 - 或相对于彼此的对位，与至少1mol巯基乙醇在水溶液或悬浮液中或在有机溶剂中，在酸结合剂存在下，在约20℃至约100℃的温度下，至式（3）的相应的羟乙基巯基苯甲酸将这些酸以本身已知的方式氧化成所述式（5）（R = O）的相应的羟乙基磺酰基硝基苯甲酸，如果需要，将其还原，以本身已知的相应羟基的方式通式（4）的“磺酰基氨基苯甲酸”（IMAGE），其中氨基和羟乙基磺酰基相对于彼此在邻位或对位。

47. 发明授权

US4778911A Process for preparation of 3-(acyl)amino-4-alkoxy-phenyl-.beta.-hydroxyethyl-sulfone (sulfonates) 失效
标题翻译：制备3-（酰基）氨基-4-烷氧基 - 苯基-β-羟基乙基砜（磺酸盐）的方法
公开(公告)号：US4778911A
公开(公告)日：1988-10-18
申请号：US065678
申请日：1987-06-18
申请人： Peter Hess , Folker Kohlhaas , Theodor Papenfuhs
发明人： Peter Hess , Folker Kohlhaas , Theodor Papenfuhs
IPC分类号： C07C315/00 , C07C67/00 , C07C313/00 , C07C315/04 , C07C317/36 , C07C317/40 , C07C141/16 , C07C103/127 , C07C103/22
CPC分类号： C07C315/00
摘要： A process for the preparation of 3-(acyl)amino-4-alkoxy-phenyl-.beta.-hydroxyethyl-sulfone (sulfates) of the formula (1) ##STR1## in which R.sub.1 is alkyl having 1-4 carbon atoms and R.sub.2 is hydrogen or one of the groupings ##STR2## with the proviso that n=1 if R.sub.2 =H and n=0 if R.sub.2 =acyl, by converting 2-alkoxyacylanilines of the formula (2) ##STR3## in which R.sub.1 and R.sub.2 have the meanings given, in a known manner to the corresponding sulfochlorides substituted in the p-position relative to the alkoxy group, reducing the sulfochlorides with an alkali metal sulfite or ammonium sulfite in an aqueous medium at pH 7.0-8.5 and at -5 to +40.degree. C. to give the corresponding sulfinates, alkoxylating the latter with ethylene oxide in an aqueous medium at pH 6.0-8.5 and 40.degree.-80.degree. C. to give the 3-acylamino-4-alkoxyphenyl-.beta.-hydroxyethyl-sulfones of the formula (1) (with R.sub.2 =acyl and n=0) and, if appropriate, esterifying the latter, with deacylation, with concentrated sulfuric acid at 70.degree.-150.degree. C. to give the compounds of the said formula (1) (with R.sub.2 H and n=1).
摘要翻译：制备式（1）的3-（酰基）氨基-4-烷氧基 - 苯基-β-羟基乙基砜（硫酸盐）的方法其中R1是具有1-4个碳原子的烷基并且R2是氢或分组 + TR ，条件是如果R2 = H，n = 1，如果R2 =酰基，则n = 0，通过将2-烷氧基苯甲酰苯胺式（2）其中R 1和R 2具有已知方式给予在相对于烷氧基的p位取代的对应的磺基氯的含义，用碱金属亚硫酸盐或铵还原磺酰氯亚硫酸盐在pH 7.0-8.5和-5至+ 40℃的水性介质中，得到相应的亚硫酸盐，将其与环氧乙烷在pH 6.0-8.5和40 -80℃的水性介质中烷氧基化成得到式（1）的3-酰基氨基-4-烷氧基苯基-β-羟乙基砜（R2 =酰基和n = 0），并且如果合适的话，将后者酯化，用去酰基化，浓缩硫酸在70-150℃，得到所述式（1）的化合物（其中R2H和n = 1）。

48. 发明授权

US4686301A Process for the preparation of 2,4-dinitrophenol alkoxyalkyl ethers 失效
标题翻译： 2,4-二硝基苯酚烷氧基烷基醚的制备方法
公开(公告)号：US4686301A
公开(公告)日：1987-08-11
申请号：US869238
申请日：1986-06-02
申请人： Theodor Papenfuhs , Friedrich Schophoff
发明人： Theodor Papenfuhs , Friedrich Schophoff
IPC分类号： C07C67/00 , C07C201/00 , C07C201/12 , C07C205/37 , C07D307/02 , C07C41/01 , C07D309/00 , C07D315/00
CPC分类号： C07C201/12
摘要： Process for the preparation of compounds of the formula (I) ##STR1## in which R denotes a C.sub.1 -C.sub.4 -alkyl radical which is optionally substituted by C.sub.1 -C.sub.4 -alkoxy groups, or a phenyl radical which can be substituted by alkyl or alkoxy groups having 1 to 4 carbon atoms or by chlorine or bromine atoms, or, together with R.sub.2, denotes an alkylene bridge --(CH.sub.2).sub.n -- in which n is the number 3 or 4, R.sub.1 denotes a hydrogen atom or an alkyl radical having 1 to 4 carbon atoms, and R.sub.2 represents a hydrogen atom or an alkyl radical having 1 to 4 carbon atoms, or, together with R, represents an alkylene bridge --(CH.sub.2).sub.n -- in which n has the meaning mentioned, by reacting 2,4-dinitrochlorobenzene with an alcohol of the formula (II) ##STR2## in which R, R.sub.1 and R.sub.2 have the meanings mentioned above, in the presence of lithium oxide or lithium hydroxide at temperatures from 0.degree. to 5.degree. C., if appropriate neutralizing the reaction mixture with a non-volatile, weak acid which is soluble in the reaction medium, and subsequently removing by distillation the alcohol of the formula (II), present in excess, then adding sufficient water at 20.degree. to 80.degree. C. for the lithium chloride formed to dissolve completely, and separating off, from the aqueous salt phase, the 2,4-dinitrophenol alkoxyalkyl ether which has separated out in a solid or liquid phase.
摘要翻译：制备式（I）化合物的方法其中R表示任选被C 1 -C 4 - 烷氧基取代的C 1 -C 4 - 烷基或可以被C 1 -C 4烷氧基取代的苯基，具有1至4个碳原子的烷基或烷氧基或氯或溴原子，或与R 2一起表示亚烷基桥 - （CH 2）n - ，其中n为3或4，R 1表示氢原子或具有1至4个碳原子的烷基，R 2表示氢原子或具有1至4个碳原子的烷基，或者与R一起代表其中n具有上述含义的亚烷基桥 - （CH 2）n - 通过使2,4-二硝基氯苯与式（II）的醇（II）反应，其中R 1，R 2和R 2具有上述含义，在氧化锂或氢氧化锂的存在下，在0℃至如果适当的话，用可溶于反应介质的非挥发性弱酸中和反应混合物然后通过蒸馏除去式（II）的醇，过量存在，然后在20-80℃下加入足够的水，使形成的氯化锂完全溶解，并从盐水相中分离出来，在固相或液相中分离出的2,4-二硝基酚烷氧基烷基醚。

49. 发明授权

US4521617A Process for preparing pure alkyl 1-hydroxy-2-naphthoates 失效
标题翻译：制备纯的1-羟基-2-萘甲酸烷基酯的方法
公开(公告)号：US4521617A
公开(公告)日：1985-06-04
申请号：US585189
申请日：1984-03-01
申请人： Theodor Papenfuhs , Heinrich Volk
发明人： Theodor Papenfuhs , Heinrich Volk
IPC分类号： C07C69/94 , C07C65/11 , C07C51/43
CPC分类号： C07C65/11
摘要： A process for preparing pure alkyl 1-hydroxy-2-naphthoates of the formula ##STR1## in which R denotes lower alkyl, by adjusting, with mineral acid, to pH 5.5-6.5 an aqueous solution of monoalkali and/or dialkali metal salts of 1-hydroxy-2-naphthoic acid, then adding a surface-active compound (1) of the formula ##STR2## in which R, R.sub.1, R.sub.2 and R.sub.3 denote aliphatic radicals of 1-30 carbon atoms which are substituted and which can contain, in the terminal positions, ionic substituents, or hydroaromatic carbocyclic or cycloaliphatic radicals of 4-8 carbon atoms, and in which X.sup.(-) represents one equivalent of an inorganic or organic acid, or (2) of the formula ##STR3## in which R, R.sub.1, R.sub.2 and X.sup.(-) have the abovementioned meanings, the total number of the carbon atoms of R, R.sub.1 and R.sub.2 being at least 6 and 2 of the aliphatic radicals R, R.sub.1 and R.sub.2 being able to form, together with the sulfur atom, a heterocyclic ring, or (3) of the formula ##STR4## in which R, R.sub.1, R.sub.2, R.sub.3 and X.sup.(-) have the meanings given in the definition of the formula (II), the total number of the carbon atoms of R, R.sub.1, R.sub.2 and R.sub.3 being at least 8 and 2 or 3 of the aliphatic radicals R, R.sub.1, R.sub.2 and R.sub.3 being able to form, together with the phosphorus atom, a heterocyclic ring, in an amount of 0.5 to 5% by weight, relative to 1-hydroxy-2-naphthoic acid, separating off the precipitates at 50.degree. C.-100.degree. C., and esterifying the pure monoalkali metal 1-hydroxy-2-naphthoate present in aqueous solution with dialkyl sulfate at pH 5.5-6.5 between 30.degree. C. and 80.degree. C.
摘要翻译：制备式（1）的纯烷基1-羟基-2-萘甲酸盐的方法，其中R表示低级烷基，通过用无机酸调节至pH 5.5-6.5，单碱性和/或二烷基的水溶液然后加入式（II）的表面活性化合物（1），其中R 1，R 2，R 2和R 3表示1-30个碳原子的脂族基团，其中在末端位置可以含有4-8个碳原子的离子取代基或者氢芳族碳环或脂环族基团，其中X（ - ）表示1当量的无机或有机酸，或（2）其中R，R 1，R 2和X（ - ）具有上述含义的式（III）化合物，R 1，R 2和R 2的总碳原子数至少为6，脂族基团R为2， R 1和R 2可以与硫原子一起形成杂环，或其中R 1，R 2，R 3和X（ - ）h的式（Ⅳ）的（3）（II）定义中给出的含义，R，R 1，R 2和R 3的碳原子总数至少为8，并且2或3个脂族基团R 1，R 2，R 2和R 3能够与磷原子一起形成杂环，相对于1-羟基-2-萘甲酸为0.5〜5重量％，在50℃-100℃下分离析出物，并在30℃至80℃之间，将存在于水溶液中的纯碱金属1-羟基-2-萘甲酸酯与pH5.5-6.5的二烷基硫酸酯酯化。

50. 发明授权

US4443630A Process for preparing 2-amino-5-nitrotoluene 失效
标题翻译：制备2-氨基-5-硝基甲苯的方法
公开(公告)号：US4443630A
公开(公告)日：1984-04-17
申请号：US453510
申请日：1982-12-27
申请人： Theodor Papenfuhs , Rudiger Berthold
发明人： Theodor Papenfuhs , Rudiger Berthold
IPC分类号： C07C209/10 , C07C67/00 , C07C209/00 , C07C211/52 , C07C85/04
CPC分类号： C07C209/10
摘要： 2-Amino-5-nitrotoluene is obtained in high yield by reacting 2-chloro-5-nitrotoluene with excess aqueous ammonia which has a concentration of at least 30% by weight. The product is used as a diazo component for preparing azo compounds.
摘要翻译：通过使2-氯-5-硝基甲苯与过量氨水反应得到2-氨基-5-硝基甲苯，其浓度至少为30重量％。该产物用作制备偶氮化合物的重氮组分。

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