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公开(公告)号:US4880571A
公开(公告)日:1989-11-14
申请号:US921918
申请日:1986-10-22
IPC分类号: C07B61/00 , B01J27/00 , C07C67/00 , C07C201/00 , C07C205/45 , C07C205/46 , C07C205/48
CPC分类号: C07C201/12 , C07C201/14
摘要: A process for the preparation of 5-nitro-1,4-naphthoquinones of formula ##STR1## wherein R is hydrogen, a C.sub.1 -C.sub.4 alkyl radical or a C.sub.1 -C.sub.4 alkoxy radical, by oxidation of 1-nitronaphthalene or a suitably substituted 1-nitronaphthalene, which process comprises carrying out the reaction with manganese(III) sulfate as oxidizing agent or a mixture of manganese(III) sulfate and cerium sulfate.The maganese(III) sulfate consumed can be regenerated electrolytically with good current yield. The process is environmentally safe, as the oxidizing agent and the solvent, if any, can be reused.
摘要翻译: 制备式“IMAGE”的5-硝基-1,4-萘醌的方法,其中R是氢,C1-C4烷基或C1-C4烷氧基,通过1-硝基萘的氧化或适当取代的1-硝基萘 该方法包括用硫酸锰(III)作为氧化剂或硫酸锰(III)和硫酸铈的混合物进行反应。 消耗的硫酸锰(III)可以以较好的电流产率电解再生。 该方法是环境安全的,因为氧化剂和溶剂(如果有的话)可以重复使用。
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22.
公开(公告)号:US3996291A
公开(公告)日:1976-12-07
申请号:US560831
申请日:1975-03-21
申请人: Henri Dietrich , Jorg Kallen , Gottfried Seifert
发明人: Henri Dietrich , Jorg Kallen , Gottfried Seifert
摘要: Production of 4-hydroxy-3,5-dibromobenzaldehyde reacting p-cresol with bromine, converting the 2,6-dibromo-p-cresol obtained as the first reaction product into 4-hydroxy-3,5-dibromobenzal bromide by further bromination and hydrolysing the latter.
摘要翻译: 生产4-羟基-3,5-二溴苯甲醛使对甲酚与溴反应,将作为第一反应产物获得的2,6-二溴 - 对甲酚进一步溴化转化为4-羟基-3,5-二溴苄溴, 水解后者。
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