Expedient synthesis of new cinnoline diones by Ru-catalyzed regioselective unexpected deoxygenation-oxidative annulation of propargyl alcohols with phthalazinones and pyridazinones
Expedient synthesis of new cinnoline diones by Ru-catalyzed regioselective unexpected deoxygenation-oxidative annulation of propargyl alcohols with phthalazinones and pyridazinones
作者:Subramani Rajkumar、S. Antony Savarimuthu、Rajendran Senthil Kumaran、C. M. Nagaraja、Thirumanavelan Gandhi
DOI:10.1039/c5cc09347c
日期:——
Ruthenium-catalyzed simple, cascade and one-pot synthesis of cinnoline-fused diones has been carried out by the C–H activation of phthalazinones/pyridazinones.
钌催化的简单、级联和一锅法合成了咖啉并环化二酮,通过对邻苯二酮/吡啶并咪唑酮的C-H活化。
Synthesis and Biological Evaluation of Novel σ<sub>1</sub> Receptor Ligands for Treating Neuropathic Pain: 6-Hydroxypyridazinones
framework, a new series of potentσ1receptor ligands associated with pharmacological antineuropathic pain activity was synthesized and is described in this article. In vitro receptor binding studies revealed highσ1receptor affinity (Ki σ1 = 1.4 nM) and excellent selectivity over not only σ2 receptor (1366-fold) but also other CNS targets (adrenergic, μ-opioid, sertonerigic receptors, etc.) for 2-(3,4-d
A novel Rh(III)-catalyzed annulation of phthalazinones or pyridazinones with various allenes was developed, leading to the formation of indazole derivatives bearing a quaternary carbon in moderate to good yields. The targeted products were synthesized via sequential C–H activation and olefin insertion, followed by β-hydride elimination and intramolecular cyclization. The synthetic protocol proceeded
开发了一种新型 Rh( III ) 催化的酞嗪酮或哒嗪酮与各种丙二烯的环化反应,从而以中等至良好的产率形成带有季碳的吲唑衍生物。目标产物通过连续的C-H活化和烯烃插入,然后是β-氢化物消除和分子内环化来合成。合成方案有效地进行,具有广泛的官能团耐受性、高原子效率和高Z选择性。通过合成转化证明了该方法的实用性。
A ruthenium-catalyzed alkenylation–annulation approach for the synthesis of indazole derivatives <i>via</i> C–H bond activation
作者:Maral Gholamhosseyni、Ebrahim Kianmehr
DOI:10.1039/c8ob00999f
日期:——
derivatives of pyridazino[1,2-a]indazoles and indazolo[1,2-b]phthalazines were readily prepared in moderate to high yields by this methodology from easily accessible starting materials via cascade directedC–Hbondactivation/annulation reactions.
N-芳基哒嗪二酮和N-芳基酞嗪二酮用丙烯酸酯进行钌催化的氧化烯基化反应,随后将所得产物在水中作为绿色溶剂进行分子内环化。吡嗪并[1,2- a ]吲唑和吲唑并[1,2- b ]酞嗪的各种衍生物可通过这种方法从中易得的起始原料通过级联定向的C–H键活化/环化反应容易地以中等至高收率制备。
Synthesis and biological evaluation of new 6-hydroxypyridazinone benzisoxazoles: Potential multi-receptor-targeting atypical antipsychotics
In recent years, multi-targeting directed ligands have attracted great interest as possible new atypical antipsychotics. Combinations of dopamine and serotonin receptor ligands within single molecules might afford new therapeutic opportunities. Herein, we describe the synthesis of a novel series of 6-hydroxypyridazinone benzisoxazoles and their binding behaviors to different receptors in terms of atypical antipsychotic behaviors. The most potent compound (46) exhibited excellent affinities for certain receptors (D-2, K-i = 0.5 +/- 0.07 nM; 5-HT1A, K-i = 5.9 +/- 0.8 nM; 5-HT2A, K-i = 0.3 +/- 0.01 nM; 5-HT6, K-i = 0.5 +/- 0.04 nM) and combined with low affinities for the H-1, 5-HT2C, and adrenergic alpha(1) receptors. In contrast to risperidone, compound 46 exhibited a high cataleptic threshold; this may be useful in the development of a novel class of drugs treating schizophrenia. (C) 2016 Elsevier Masson SAS. All rights reserved.