CAS: 4383-05-5; 2-(Hydroxymethyl)-6-Methoxyphenol

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3-甲氧基水杨酸置于lithium Aluminium Tetrahydride体系中,用 四氢呋喃 作为反应溶剂,化学反应生成 2-羟基-3-甲氧基苄醇
参考文献:协同手性伯胺/钯催化的不对称retro-Claisen反应.
标题:协同手性伯胺/钯催化的不对称retro-Claisen反应.
摘要:我们在本文中描述了β-二酮与水杨酸盐碳酸酯的手性伯胺/钯催化的不对称逆克莱森反应.通过一系列脱羧苄基化,逆克莱森裂解和烯胺质子化反应,获得了一系列具有非常好收率和优异对映选择性的手性α-烷基化酮和大环内酯.该策略具有广泛的底物范围,温和的条件以及以水杨酸碳酸酯为邻醌甲基化物前体的高原子经济性.
DOI:10.1021/acs.Orglett.9B02491

专利信息

专利号:US-7056348-B2
优先权日:2001-04-19
标题:5-aryl-1,3,3-trimethyl-2-methylene-indoline derivatives and salts thereof, methods for the production and use of said compounds for the temporary coloration of fibers
发明人：SAUTER GUIDO; BRAUN HANS-JUERGEN; REICHLIN NADIA
权利人:WELLA AG
摘要:A method for the synthesis of 5-aryl-1,3,3,-trimethyl-2-methylene-indoline derivatives of Formula (I) or its salts of Formula (Ia) wherein 1 mole of a 5-aryl-2,3,3-trimethyl-3H-indole derivative of Formula (VII) is reacted for 1 to 44 hours at a temperature of 20° to 180° C. in an apolar, aprotic or polar, protic or polar aprotic solvent with 1 to 50 moles of a compound of Formula R1-A; new compounds of Formulas (I)/(Ia) and (V), obtainable by this method as well as an agent containing at least one compound of Formula (I)/(Ia) and a carbonyl/imine compound for dyeing keratinic fibers and a method for temporarily dyeing keratin fibers, for which the keratin fiber is dyed with the aforementioned agent and the dyeing, so obtained, is removed again at any later time by a sulfite preparation.

专利号:WO-2025055194-A1
优先权日:2023-09-14
标 题:Genetically engineered bacterium for de novo synthesis of vanillin using glucose as substrate, and use thereof