Synthesis of Bidentate Nitrogen Ligands by Rh-Catalyzed C–H Annulation and Their Application to Pd-Catalyzed Aerobic C–H Alkenylation
作者:Hyun Tae Kim、Eunsu Kang、Minkyu Kim、Jung Min Joo
DOI:10.1021/acs.orglett.1c01040
日期:2021.5.7
A new class of bidentate ligands was prepared by a modular approach involving Rh-catalyzedC–H annulation reactions. The resulting conformationally constrained ligands enabled the Pd-catalyzed C–H alkenylation at electron-rich and sterically less hindered positions of electron-rich arenes while promoting the facile oxidation of Pd(0) intermediates by oxygen. This newly introduced ligand class is complementary
The C−Holefination of substituted anisole derivatives as limiting reagents has been realized by a Pd/S, O-ligand catalyst providing the olefinated products in good yields and site selectivities. The reaction proceeds under mild conditions with a broad range of substituted aryl ethers bearing both electron-donating and electron-withdrawing substituents.
The first total synthesis of cadinane sesquiterpenoid alanense A, in which an intramolecular dehydrative Friedel–Crafts alkylation of 2,5-diaryl-2-pentanol is incorporated as a key step, has been achieved. The combinatorial use of p-TsOH·H2O as a catalyst and 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) as a solvent provides 1,1-disubstituted tetrahydronaphthalene in 97% yield. It was also found that the
首次实现了杜松倍半萜 alanense A 的全合成,其中关键步骤是 2,5-二芳基-2-戊醇的分子内脱水 Friedel-Crafts 烷基化。组合使用p -TsOH·H 2 O作为催化剂和1,1,1,3,3,3-六氟-2-丙醇(HFIP)作为溶剂,以97%的收率提供1,1-二取代的四氢萘。研究还发现, p -TsOH 和 HFIP 的组合可有效去除酚类 MOM 醚。
Novel 8-Substituted Dipyridodiazepinone Inhibitors with a Broad-Spectrum of Activity against HIV-1 Strains Resistant to Non-nucleoside Reverse Transcriptase Inhibitors
作者:Jeff A. O'Meara、Christiane Yoakim、Pierre R. Bonneau、Michael Bös、Michael G. Cordingley、Robert Déziel、Louise Doyon、Jianmin Duan、Michel Garneau、Ingrid Guse、Serge Landry、Eric Malenfant、Julie Naud、William W. Ogilvie、Bounkham Thavonekham、Bruno Simoneau
DOI:10.1021/jm050255t
日期:2005.8.1
A series of novel 8-substituted dipyridodiazepinone-based inhibitors were investigated for their antiviral activity against wild type human immunodeficiency virus (HIV-1) and the clinically prevalent K103N/Y181C mutant virus. Our efforts have resulted in a series of benzoic acid analogues that are potent inhibitors of HIV-1 replication against a panel of HIV-1 strains resistant to non-nucleoside reverse transcriptase inhibitors (NNRTIS). Furthermore, the combination of good antiviral potency, a broad spectrum of activity, and an excellent pharmacokinetic profile provides strong justification for the further development of compound 7 as a potential treatment for wild type and NNRTI-resistant HIV-1 infection.