Cyclization of 4-Phenoxy-2-coumarins and 2-Pyrones via a Double C–H Activation
作者:Katrina Mackey、Leticia M. Pardo、Aisling M. Prendergast、Marie-T. Nolan、Lorraine M. Bateman、Gerard P. McGlacken
DOI:10.1021/acs.orglett.6b00751
日期:2016.6.3
Aryl–heteroaryl coupling via double C–H activation is a powerful transformation that avoids the installation of activating groups. A double C–H activation of privileged biological scaffolds, 2-coumarins and 2-pyrones, is reported. Despite the rich chemistry of these molecular frameworks, the yields are very good. Excellent regioselectivity was achieved on the pyrones. This methodology was applied to the synthesis
Pd/Indanone-Based Ligands: An Efficient Catalyst System for Ullmann-Type, Suzuki–Miyaura, and Mizoroki–Heck Cross-Coupling Reactions with Aryl Tosylates and Aryl Halides
作者:Mohammed Waheed、Naseem Ahmed
DOI:10.1055/s-0036-1589058
日期:2017.9
efficiency. 2-Hydroxyindan-1-ones have been efficiently synthesized and successfully applied as ligands in Pd-catalyzed Ullmann type, Suzuki–Miyaura, and Mizoroki–Heckcross-couplingreactions with aryl tosylates and aryl halides. The ligands are air- and moisture-stable and have shown high catalytic activity with Pd(OAc)2 in these cross-couplingreactions. The system tolerates a variety of functional
characterized by excess accumulation of extracellular matrix, involved in many chronic diseases or injuries, threatens human health greatly. We have reported a series of compounds bearing coumarin scaffold which potently inhibited TGF-β-induced total collagen accumulation in NRK-49F cell line and migration of macrophages. Compound 9d also suppressed the TGF-β-induced protein expression of COL1A1, α-SMA
特发性肺纤维化的特征是细胞外基质过多积聚,涉及许多慢性疾病或伤害,极大地威胁着人类健康。我们已经报道了一系列带有香豆素支架的化合物,该化合物可有效抑制TRK-β诱导的NRK-49F细胞系中总胶原蛋白的积累和巨噬细胞的迁移。化合物9d在体外还抑制了TGF-β诱导的COL1A1,α-SMA和p-Smad3蛋白表达。同时,在口服博多霉素诱导的肺纤维化模型中,以100 mg / kg / day的剂量连续9d服药4周可有效减轻肺组织炎性细胞的浸润和纤维化程度,这可能与其抑制TGF-β/有关。 Smad3途径和抗炎功效。此外,第9天显示出良好的生物利用度(F = 39。