The present application relates to a process for preparing a dicarboxylic acid or dicarboxylic ester according to general formula (IV) R1OOC-(CH2)m-CH2CH2-(CH2)y-COOR4 (IV), comprising the steps of subjecting alkenoic acid or alkenoate of formula (II) R1OOC-(CH2)m-CH=CH-(CH2)x-H (II) to a metathesis reaction in the presence of a metathesis catalyst to form a longer-chain alkenoic acid or alkenoate of formula (III) R1OOC-(CH2)m-CH=CH-(CH2)y-H (III) where x
本申请涉及一种根据通式(IV)R1OOC-(CH2)m-CH2CH2-(CH2)y-COOR4(IV)制备二羧酸或二羧酸酯的方法,包括以下步骤:将通式(II)R1OOC-(CH2)m-CH=CH-(CH2)x-H(II)的烯酸或烯酸酯在存在烯烃交换催化剂的情况下进行交换反应,形成通式(III)R1OOC-(CH2)m-CH=CH-(CH2)y-H(III)的长链烯酸或烯酸酯,其中x
Catalytic aerobic oxidation of allylic alcohols to carbonyl compounds under mild conditions
作者:Lucia Tonucci、Marco Nicastro、Nicola d'Alessandro、Mario Bressan、Primiano D'Ambrosio、Antonino Morvillo
DOI:10.1039/b813019a
日期:——
A new catalytic aerobic oxidation of alcohols to aldehydes under green conditions was developed (room temperature and pressure, water solution, open vials). The water-soluble platinum(II) tetrasulfophthalocyanine (PtPcS) catalyst showed the best selectivity for carbonyl derivatives, and in particular for α,β-unsaturated alcohols; the reactions are slow.
新型催化好氧 氧化作用 的 酒类 到 醛类在绿色条件下开发(室温和压力,水溶液,开瓶)。水溶性四硫酞菁铂金(PtPcS)催化剂 表现出最佳的选择性 羰 导数,特别是对于不饱和的α,β 酒类; 反应很慢。
Design, synthesis and biological evaluation of AZD9291 derivatives as selective and potent EGFRL858R/T790M inhibitors
作者:Bingbing Zhao、Zhen Xiao、Jianguo Qi、Rong Luo、Zhou Lan、Yanzhuo Zhang、Xiaohan Hu、Qidong Tang、Pengwu Zheng、Shan Xu、Wufu Zhu
DOI:10.1016/j.ejmech.2018.11.069
日期:2019.2
(SBDD) and optimized the structure to obtain a series of potent and selective EGFRL858R/T790M inhibitors. The most potent compound 18e demonstrated excellent kinase inhibitory activity and selectivity for EGFRL858R/T790M double mutants and the IC50 value reached nanomolar level. The selectivity of 18e against wild-type EGFR was near to 200-fold. In addition, compound 18e also inhibited H1975 cells proliferation
第三代表皮生长因子受体(EGFR)L858R / T790M抑制剂仍然是治疗晚期非小细胞肺癌(NSCLC)的主要药物,这些药物已取得了显着的临床疗效。然而,仍然有许多患者患有由NSCLC引起的耐药性突变和药物副作用。在这项研究中,以分子模拟为指导,我们应用了基于结构的药物设计策略(SBDD),并优化了结构以获得一系列有效的选择性EGFR L858R / T790M抑制剂。最有效的化合物18e对EGFR L858R / T790M双突变体和IC 50具有极好的激酶抑制活性和选择性价值达到纳摩尔水平。18e对野生型EGFR的选择性接近200倍。此外,化合物18e在0.25μM的浓度下还抑制了H1975细胞在G2 / M期的增殖并诱导了细胞凋亡,这使其在潜在的肺癌研究中更具价值。
Ru-Based Catechothiolate Complexes Bearing an Unsaturated NHC Ligand: Effective Cross-Metathesis Catalysts for Synthesis of (<i>Z</i>)-α,β-Unsaturated Esters, Carboxylic Acids, and Primary, Secondary, and Weinreb Amides
作者:Zhenxing Liu、Chaofan Xu、Juan del Pozo、Sebastian Torker、Amir H. Hoveyda
DOI:10.1021/jacs.9b02318
日期:2019.5.1
compounds is illustrated through two representative applications: an eight-step, 15% overall yield, and completely Z-selective route leading to an intermediate that may be used in synthesis of stagonolide E (vs 11 steps, 4% overall yield and 91% Z, previously), and a five-step, 25% overall yield sequence to access a precursor to dihydrocompactin (vs 13 steps and 5% overall yield, formerly).
尽管取得了显着进展,但用于制备 (Z)-α,β-不饱和羰基化合物的烯烃复分解方法仍然很少,适用于合成多种生物活性分子。特别需要的是可以由基于钌的催化剂促进的转化,因为这样的实体将允许直接获得羧酸酯和酰胺或酸(与基于钼或钨的亚烷基相反)。在这里,我们详细介绍了如何根据通过计算和实验研究获得的机理洞察,发现一种易于获得的儿茶酚硫合钌配合物,该配合物可用于生成许多 α,β-不饱和羰基化合物,产率高达 81%,≥98: 2 Z/E 比率。我们首次证明,通过使用带有不饱和 N-杂环卡宾 (NHC) 配体的复合物,源自缺电子性更强的酯、酸和 Weinreb 酰胺(相对于伯酰胺或仲酰胺)的产物可以高效合成并具有高度立体化学控制。通过两个代表性应用说明了合成生物活性化合物的新进展的重要性:八步、15% 的总产率和完全 Z 选择性路线,导致可用于合成 stagonolide E 的中间体(vs 11步骤,4%
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