Ruthenium-Catalyzed Oxidative Dearomatization of Phenols to 4-(tert-Butylperoxy)cyclohexadienones: Synthesis of 2-Substituted Quinones from p-Substituted Phenols
The ruthenium-catalyzedoxidation of phenols with tert-butylhydroperoxide efficiently gives the corresponding 4-(tert-butylperoxy)cyclohexadienones. The oxidation proceeds selectively because of ruthenium's ability for rapid single-electron transfer. This biomimetic oxidation reaction is highly useful to obtain the metabolic compounds desired for confirming the safety of medicines and related compounds
Accessing <i>para</i>-Alkylphenols via Iridium-Catalyzed Site-Specific Deoxygenation of Alcohols
作者:Jing Wang、Tingting Wang、Hongguang Du、Ning Chen、Jiaxi Xu、Zhanhui Yang
DOI:10.1021/acs.joc.3c01294
日期:2023.9.1
An iridium-catalyzed and phenol-directed deoxygenation of benzylic alcohols comes as an alternative access to 4-alkylphenols, featuring low catalyst loading (S/C up to 20,000, TOF up to 12,400 h–1), high functionality compatibility, and excellent site-selectivity. The applications in late-stage modification of steroids and gram-scale total synthesis of a Gastrodia elata extract are highlighted. Mechanistically
铱催化和苯酚引导的苄醇脱氧是制备 4-烷基苯酚的替代方案,具有催化剂负载量低(S / C高达 20,000,TOF 高达 12,400 h –1)、高功能兼容性和优异的现场性等特点-选择性。重点介绍了天麻提取物在类固醇后期修饰和克级全合成中的应用。从机理上讲,醌甲基化物的中间作用控制了位点选择性,氢化铱的形成作为限速步骤。
Pyrimidine derivatives, methods for producing them, and fungicides, insecticides and/or acaricides containing them as active ingredient
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0467760A1
公开(公告)日:1992-01-22
A compound which is effective as an active ingredient of fungicides, insecticides and/or acaricides, and is represented by the formula and a method for preparing the same are provided:
wherein R₁ represents a lower alkyl group, R₂ represents a lower alkyl group or a halogen atom, or R₁ and R₂ are bonded together at their termini and represent trimethylene or tetramethylene, R₃ represents a hydrogen atom, a lower alkyl group or a halogen atom, R₄ represents a hydrogen atom or a lower alkyl group, R₅ represents a hydrogen atom, a lower alkyl group or a methylthio group and n represents 2 or 3.
The present invention relates to a solid cleaning composition including particles bound together by a binding agent.
本发明涉及一种固体清洁组合物,其中包括由结合剂结合在一起的颗粒。
Pressed, waxy, solid cleaning compositions and methods of making them
申请人:Ecolab Inc.
公开号:EP2677023A2
公开(公告)日:2013-12-25
The present invention relates to a method of making a solid cleaning composition. The method can include pressing and/or vibrating flowable waxy particles of a waxy cleaning composition. For a waxy cleaning composition, pressing and/or vibrating flowable waxy particles determines the shape and density of the solid but is not required for forming a solid. The method can employ a concrete block machine for pressing and/or vibrating. The present invention also relates to a solid cleaning composition made by the method and to solid cleaning compositions including particles bound together by a binding agent.