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公开(公告)号:US4209469A
公开(公告)日:1980-06-24
申请号:US971135
申请日:1978-12-19
申请人: Hans Thies , Fred von Kaenel
发明人: Hans Thies , Fred von Kaenel
IPC分类号: C07C323/09 , B01J23/00 , B01J23/42 , B01J27/00 , B01J27/04 , C07C67/00 , C07C313/00 , C07C319/02 , C07C319/14 , C07C321/26 , C07C323/20 , C07C323/62 , C07C148/00
CPC分类号: C07C323/00
摘要: A process for the production of an aryl thiol, which comprises hydrogenating an aryl sulfochloride in a protic or aprotic solvent in the presence of platinum as catalyst, at a temperature between 100.degree. and 180.degree. C., with hydrogen under a pressure of 2 to 140 bar, in a single reaction step.
摘要翻译: 一种制备芳基硫醇的方法,其包括在铂作为催化剂存在下,在质子性或非质子溶剂中,在100-180℃的温度下,在氢气压力为2〜 140巴,在一个单一的反应步骤。
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公开(公告)号:US4510100A
公开(公告)日:1985-04-09
申请号:US559149
申请日:1983-12-07
IPC分类号: C07C309/47 , C07C67/00 , C07C301/00 , C07C303/08 , C07C303/32 , C07C143/60
CPC分类号: C07C309/00
摘要: The invention relates to an improved process for the production of 2-amino-1-naphthalenesulfonic acid (Tobias acid). This improved process makes it possible to obtain Tobias acid which has only a very low content of 2-aminonaphthalene and in high space-time yield. The process starts from 2-hydroxynaphthalene and comprises the following main reaction steps:(a) the sulfonation of 2-hydroxynaphthalene to 2-hydroxynaphthalene-1-sulfonic acid (oxy-Tobias acid) with chlorosulfonic acid, in an inert organic solvent;(b) the neutralization of the liberated hydrochloric acid and excess chlorosulfonic acid still present in the reaction medium and conversion of the 2-hydroxynaphthalene-1-sulfonic acid obtained into the corresponding ammonium salt with ammonia;(c) conversion of the 2-hydroxy group into the 2-amino group by the Bucherer reaction; and(d) the subsequent precipitation of the Tobias acid with dilute sulfuric acid.
摘要翻译: 本发明涉及一种生产2-氨基-1-萘磺酸(托比亚酸)的改进方法。 这种改进的方法使得可以获得仅具有非常低的2-氨基萘含量和高空时收率的托比亚酸。 该方法从2-羟基萘开始,包括以下主要反应步骤:(a)在惰性有机溶剂中用氯磺酸将2-羟基萘磺化为2-羟基萘-1-磺酸(氧 - 托比酸); (b)中和反应介质中仍然存在的游离的盐酸和过量的氯磺酸,并将得到的2-羟基萘-1-磺酸转化为相应的铵盐与氨; (c)通过Bucherer反应将2-羟基转化为2-氨基; 和(d)随后用稀硫酸沉淀托比亚酸。
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