510,010. Dyes. GROVES, W. W. (I.G. Farbenindustrie Akt.-Ges.). Jan. 25, 1938, No. 2382. [Classes 2 (iii) and 15 (ii)] Products of the formula where X is'OH or NHR, where NHR is the radical of a primary amine, are made by reacting leuco-5.6.7.8-tetrahydroquinizarin with a primary amine or mixture of amines and oxidizing the leuco-compound so obtained. Also according to the invention, leuco-5,6,7,8-tetrahydroquinizarin is made by hydrogenating a quinizarin ether in 'presence of a metal catalyst to give a hexahydroquinizarin ether, which is saponified, e.g., with sulphuric or phosphoric acid. The products of the above formula may be sulphonated and dye wool or acetate artificial silk blue to green tints. Amines specified include benzylamine and amines containing sulpho groups. The reaction is preferably conducted in a diluent, such as alcohol or excess amine, below 200‹C., and sometimes in presence of boric acid, followed by oxidation with air sometimes in presence of piperidine or ferric chloride, e.g., in glacial acetic acid. In examples, leuco-5,6,7,8-tetrahydroquinizarin is reacted with the following amines, followed by oxidation and in some cases sulphonation of the products : (1) p-toluidine, (2) 4-aminodiphenyl, (3) 4- cyclohexylaniline, (4) ethylamine or methylamine, (5) hydroxyethylamine, (6) cyclohexylamine in about equimolecular proportion, or (7) in excess. (8) mesidine, (9) 2-amino-1.2.3.4- tetrahydronaphthalene, the diamino body being obtained in every case except (6), and with (10) a mixture of ethylamine and hydroxyethylamine to give 1-ethylamino-4-#-hydroxyethylamino - 5.6.7.8 - tetrahydroanthraquinone, (11) p-n-butoxyaniline, '(12) p-n-butylaniline, (13) a mixture of methylamine and hydroxyethylamine to give 1-methylamino-4-hydroxyethylamino - 5,7.6.8 - tetrahydroanthraquinone, (14) p-tert.-butylaniline. In further examples, quinizarin dimethyl or diethyl ether is hydrogenated under pressure in presence of a nickel catalyst, followed by saponification with concentrated sulphuric acid.
510,010.
染料。GROVES,W.W.(I.G. Farbenindustrie Akt.-Ges.)。1938年1月25日,编号2382。[类别2(iii)和15(ii)] 通过将白色-5,6,7,8-四氢喹喙啉与一种主要胺或胺混合物反应,并氧化得到的白色化合物,制备了以下公式的产品,其中X为'OH或NHR,其中NHR为一种主要胺的基团。根据本发明,通过在
金属催化剂的存在下氢化喹喙啉醚以得到六氢喹喙啉醚,然后将其皂化,例如,用
硫酸或
磷酸。上述公式的产品可以磺化并染色羊毛或
醋酸人造丝为蓝色至绿色色调。指定的胺包括
苄胺和含有磺基的胺。反应最好在稀释剂中进行,例如醇或过量胺,温度低于200°C,并有时在
硼酸的存在下进行,然后用空气氧化,有时在
吡啶或
氯化
铁的存在下进行,例如,在
冰乙酸中。在示例中,白色-5,6,7,8-四氢喹喙啉与以下胺反应,然后氧化并在某些情况下磺化产物:(1)对甲
苯胺,(2)4-
氨基二苯,(3)4-
环己基苯胺,(4)
乙胺或
甲胺,(5)羟
乙胺,(6)
环己胺,约等分子量,或(7)过量。 (8)
间苯二胺,(9)2-
氨基-
1,2,3,4-四氢萘,除(6)外,在每种情况下获得二
氨基体,以及(10)
乙胺和羟
乙胺的混合物,以得到1-乙基
氨基-4-#-羟乙基
氨基-5,6,7,8-四氢
蒽醌,(11)对-正
丁氧基苯胺,(12)对-正
丁苯胺,(13)
甲胺和羟
乙胺的混合物,以得到1-甲基
氨基-
4-羟乙基
氨基-5,7,6,8-四氢
蒽醌,(14)对-
叔丁基苯胺。在进一步的示例中,喹喙啉二
甲醚或二
乙醚在压力下在
镍催化剂的存在下氢化,然后用浓
硫酸皂化。