Direct<i>ortho</i>-Trifluoroethylation of Aromatic Ureas by Palladium Catalyzed C-H activation: A Missing Piece of Aromatic Substitutions
作者:Szabolcs Kovács、Balázs L. Tóth、Gábor Borsik、Tamás Bihari、Nóra V. May、András Stirling、Zoltán Novák
DOI:10.1002/adsc.201601136
日期:2017.2.2
Development of direct late‐stage installation of alkyl groups into aromatic systems is an important and challenging task of current organic chemistry. In spite of the existing functionalization methods in organic chemistry for the substitution reactions on aromatic systems, the direct alkylation of aromatic ureas is unknown. Herein, as a first example we report a novel palladium catalyzed fluoroalkylation
Rhodium(<scp>iii</scp>)-catalyzed and MeOH-involved regioselective mono-alkenylation of N-arylureas with acrylates
作者:Honggui Lv、Jingjing Shi、Junjun Huang、Chao Zhang、Wei Yi
DOI:10.1039/c7ob01627a
日期:——
mono-alkenylation of arenes with acrylates using NHCONMe2 as the transformable directing group, giving direct access to diverse ortho-acrylated N-phenyl carbamates. The syntheticapplication of the obtained products to build privileged quinolin-2(1H)-ones and 3-(2-aminophenyl)acrylates has also been demonstrated in subsequent derivatization reactions.
Rh(III)-Catalyzed Chemoselective C–H Alkenylation and [5 + 1] Annulation with <i>Gem</i>-Difluoromethylene Enabled by the Distinctive Fluorine Effect
作者:Jian Yang、Wendi Shi、Weijie Chen、Hui Gao、Zhi Zhou、Wei Yi
DOI:10.1021/acs.joc.1c01012
日期:2021.7.16
by the distinctive fluorine effect to provide the different coordination mode of the Rh(III) catalyst binding to the directing group, thereby giving the direct access to difluorinated 2-alkenyl arylureas and 3,4-dihydroquinazolin-2(1H)-ones bearing both an α-quaternary carbon center and a monofluoroalkenyl moiety with broad substrate compatibility and good functional group tolerance. The synthetic application
The degradation of isoproturon photoinduced by Fe(III) was investigated under both artificial and solar light. The monomeric species Fe(OH)2+ present under the experimental conditions ([Fe(III)] = 3 x 10(-4) M) is the main Fe(III) species responsible for the degradation of isoproturon. The process involves the attack on the pollutant by OH radicals generated by irradiation of Fe(OH)2+. The major primary
研究了在人工和太阳光下,Fe(III)光诱导的异丙隆的降解。在实验条件下([Fe(III)] = 3 x 10(-4)M)存在的单体Fe(OH)2+是负责异丙隆降解的主要Fe(III)物种。该过程涉及Fe(OH)2+辐射产生的OH自由基对污染物的侵蚀。确定了主要的主要照相产品;它们在降解之前会积聚在溶液介质中。在降解过程中,监测溶液对海洋细菌鱼弧菌(Leijmann&Neumann)的毒性。它在反应的早期阶段增加,并且在光产物中,N-甲酰基衍生物似乎是引起毒性增加的主要产物。