Synthesis of 1,4-Dienes through the Regioselective Coupling of ((E)-1-Alkenyl)ethylzinc Reagents with Allylic Halides. The Effect of Catalyst and Solvent on the Outcome of This Reaction
A series of novel pyrazole-benzimidazole derivatives (6-42) have been designed, synthesized and evaluated for their in vitro antiproliferative activity against the HCT116, MCF-7 and Huh-7 cell lines. Among them, compounds 17, 26 and 35 showed significant antiproliferative activity against HCT116 cell lines with the IC50 values of 4.33, 5.15 and 4.84 μM, respectively. Moreover, fluorescent staining
MnO<sub>2</sub> as a terminal oxidant in Wacker oxidation of homoallyl alcohols and terminal olefins
作者:Rodney A. Fernandes、Gujjula V. Ramakrishna、Venkati Bethi
DOI:10.1039/d0ob01344g
日期:——
PdCl2/CrO3/HCl produced α,β-unsaturated ketonesfrom homoallyl alcohols, the present method provided orthogonally the β-hydroxy-methyl ketones. No overoxidation or elimination of benzylic and/or β-hydroxy groups was observed. The method could be extended to the oxidation of simple terminalolefins as well, to methyl ketones, displaying its versatility. An application to the regioselective synthesis of gingerol is
作者:Alexis Theodorou、Ierasia Triandafillidi、Christoforos G. Kokotos
DOI:10.1002/ejoc.201601144
日期:2017.3.17
A cheap, green and metal-free one-pot procedure for the dihydroxylation of alkenes is described. H2O2 was employed as the oxidant and 2,2,2-trifluoroacetophenone as the organocatalyst, leading to a highly sustainable protocol, where a variety of homoallylic alcohols, amino-alkenes and double bonds were converted into the corresponding polyalcohols in high to excellent yields. This manifold takes advantage
dihydrobenzofurans via an organocatalytic oxidation of o-allylphenols is presented. The use of 2,2,2-trifluoroacetophenone and H2O2 as the oxidation system, leads to a highly useful synthetic method, where a variety of substituted o-allylphenols were cyclized in high yields. A green and cheap protocol for the synthesis of dihydrobenzofurans via an organocatalytic oxidation of o-allylphenols is presented. The use of
作为专题“现代合成中的环化策略”的一部分发布 抽象的 提出了一种绿色廉价的方案,用于通过邻烯丙基苯酚的有机催化氧化合成二氢苯并呋喃。使用2,2,2-三氟苯乙酮和H 2 O 2作为氧化系统,导致了一种非常有用的合成方法,其中各种取代的邻烯丙基苯酚均以高收率环化。 提出了一种绿色廉价的方案,用于通过邻烯丙基苯酚的有机催化氧化合成二氢苯并呋喃。使用2,2,2-三氟苯乙酮和H 2 O 2作为氧化系统,导致了一种非常有用的合成方法,其中各种取代的邻烯丙基苯酚均以高收率环化。
Oxidative cyclization of alkenoic acids promoted by AgOAc
作者:Ulises A. Carrillo-Arcos、Jonathan Rojas-Ocampo、Susana Porcel
DOI:10.1039/c5dt03808a
日期:——
Alkenoic acids derived from salicylic acid analogues undergo an unexpected oxidative cyclization process triggered by AgOAc leading to 4H-benzo[d][1,3]dioxin-4-ones.