CAS: 65235-31-6; 4-[(2-Hydroxyethyl)Amino]-3-Nitrophenol

上下游产品

CAS号81612-54-6 HC 橙 NO. 3

2-硝基-N-羟乙基-P-茴香胺置于氢溴酸体系中,用93%的收率获得产物3-硝基-4-羟乙基氨基苯酚
参考文献:一种3-硝基-4-羟乙氨基苯酚的合成方法
标题:一种3-硝基-4-羟乙氨基苯酚的合成方法
摘要:本发明涉及一种3‑硝基‑4‑羟乙氨基苯酚的合成方法,在加热条件下,下式ⅰ化合物与乙醇胺反应,得到下式ⅱ化合物;步骤(1)所得化合物ⅱ与氢溴酸加热至回流条件下脱甲基反应,得到化合物3‑硝基‑4‑羟乙氨基苯酚氢溴酸盐,化合物3‑硝基‑4‑羟乙氨基苯酚氢溴酸盐再与浓氨水反应,得到下式ⅲ化合物,即为目标产物.本发明提供了一种全新的反应路线,采用廉价易得的4‑二甲氧基‑2‑硝基苯和乙醇胺作为主要原料,整个制备过程简单,易操作且无高毒性和高危性,所得产物产率高,易于实现工业化生产;反应过程中的原料乙醇胺,氢溴酸均可回收套用,不仅减少了三废,而且节约了成本.

专利信息

专利号:US-8012220-B2
优先权日:2006-04-13
标题 :Specific monocationic monochromophoric compounds of hydrazone type comprising a 2-, 4-pyridinium or 2-, 4-quinolinium unit, synthesis thereof, dye compositions containing them, and method for dyeing keratin fibres
发明人：DAVID HERVE; MURGUET NADEGE; GREAVES ANDREW
权利人:OREAL
摘要:The present disclosure relates to monocationic monochromophoric compounds of formula (I) and (II) and dyeing compositions and multicompartment devices comprising monocationic monochromophoric compounds of formula (I) and (II). The disclosure also relates to methods for preparing monocationic monochromophoric compounds of formula (I) and (II), and also to methods for dyeing comprising applying monocationic monochromophoric compounds of formula (I) and (II) to keratin fibers.

专利号:US-10731038-B2
优先权日:2016-06-23
标题 :(Dis)symmetric azomethine-type direct dye comprising at least one pyrazolopyridine unit, process for dyeing keratin fibers using this dye
发明人：SABELLE STÉPHANE; BLAIS STÉPHANE; FADLI AZIZ
权利人:OREAL
摘要:The subject of the present invention is symmetric or dissymetric azomethine direct dyes comprising at least one pyrazolopyridine unit of formula (I), a composition comprising said dyes, a process for treating keratin fibers using said dyes, a process for preparing these compounds, synthesis intermediates and a kit. In which formula (I) X, Y 1 , Y 2 , Z 1 , and R 1 to R 5 are as defined in the description.

专利号:US-6570019-B2
优先权日:2000-02-25
标 题:Cationic pyrrolo-pyrrol-derivatives, method for producing them and colorants for keratin fibers, containing these compounds
发明人：PASQUIER CECILE; WYSS PATRICK; BRAUN HANS-JUERGEN
权利人:WELLA AG
摘要:The object of the present invention are diketopyrrolopyrroles of the general formula (I)wherein, independently of one another, Q1 and Q2 represent an optionally substituted, aromatic, isocyclic or heterocyclic group with 5 to 14 atoms in the ring, the heterocyclic group containing at least one oxygen, nitrogen or sulfur atom, and the R1 and R2 groups, independently of one another represent hydrogen or a Y-B+A- group, with the proviso that at least one of the R1 and R2 groups is not hydrogen; B+ is an aromatic, aliphatic, alicyclic, aromatic heterocyclic or non-aromatic heterocyclic, quaternary ammonium group or a quaternary phosphonium group; Y is an optionally substituted linear or branched C1 to C6 alkylene group and A- is an anion; a method for their synthesis as well as agents, containing compounds of formula (I), for dyeing keratin fibers.

专利号:WO-2007122341-A2
优先权日:2006-04-13
标题 :Specific monocationic monochromophoric hydrazone compounds containing a 2-(benz)imidazolium unit, their synthesis, dyeing compositions comprising them, method of dyeing keratin fibres

专利号:EP-2010494-B1
优先权日:2006-04-13
标题:Specific monocationic monochromophoric compounds of hydrazone type comprising a 2-, 4-pyridinium or 2-, 4-quinolinium unit, synthesis thereof, dye compositions containing them, and method for dyeing keratin fibres

专利号:EP-2010494-A1
优先权日:2006-04-13
标 题 :Specific monocationic monochromophoric compounds of hydrazone type comprising a 2-, 4-pyridinium or 2-, 4-quinolinium unit, synthesis thereof, dye compositions containing them, and method for dyeing keratin fibres