ZANIRATO, P.;SPAGNOLO, P.;ZANARDI, G., J. CHEM. SOC. PERKIN TRANS., 1983, N 10, 2551-2554
作者:ZANIRATO, P.、SPAGNOLO, P.、ZANARDI, G.
DOI:——
日期:——
PYRAZOLES FOR INHIBITING PROTEIN KINASES
申请人:AGOURON PHARMACEUTICALS, INC.
公开号:EP1274706A1
公开(公告)日:2003-01-15
US6462069B2
申请人:——
公开号:US6462069B2
公开(公告)日:2002-10-08
[EN] PYRAZOLES FOR INHIBITING PROTEIN KINASE<br/>[FR] PYRAZOLES PERMETTANT D'INHIBER DES PROTEINES KINASES
申请人:AGOURON PHARMA
公开号:WO2001079198A1
公开(公告)日:2001-10-25
Amino-pyrazole compounds of formula (I), that modulate and/or inhibit the activity of protein kinases. These compounds and pharmaceutical compositions containing them are capable of mediating and/or inhibiting the activity cyclin-dependent kinases, thereby modulating and/or inhibiting unwanted cell proliferation. The invention is also directed to the therapeutic or prophylatic use of pharmaceutical compositions containing such compounds, and to methods of treating cancer as well as other disease states associated with unwanted angiogenesis and/or cellular proliferation, such as diabetic retinopathy, neovascular glaucoma, rheumatoid arthritis, and psoriasis, by administering effective amounts of such compounds.
Enantioselective Photoredox Catalysis Enabled by Proton-Coupled Electron Transfer: Development of an Asymmetric Aza-Pinacol Cyclization
作者:Lydia J. Rono、Hatice G. Yayla、David Y. Wang、Michael F. Armstrong、Robert R. Knowles
DOI:10.1021/ja4100595
日期:2013.11.27
protocol for the reductive coupling of ketones and hydrazones is reported. These reactions proceed through neutral ketyl radical intermediates generated via a concerted proton-coupled electron transfer (PCET) event jointly mediated by a chiral phosphoric acid catalyst and the photoredox catalyst Ir(ppy)2(dtbpy)PF6. Remarkably, these neutral ketyl radicals appear to remain H-bonded to the chiral conjugate
报道了第一个用于酮和腙还原偶联的高度对映选择性催化方案。这些反应通过由手性磷酸催化剂和光氧化还原催化剂 Ir(ppy)2(dtbpy)PF6 共同介导的协同质子耦合电子转移 (PCET) 事件产生的中性羰基自由基中间体进行。值得注意的是,在随后的 CC 键形成步骤过程中,这些中性羰基自由基似乎保持与布朗斯台德酸的手性共轭碱 H 键合,从而提供具有优异水平的非对映选择性和对映选择性的顺式 1,2-氨基醇衍生物. 这项工作首次证明了不对称催化中协同 PCET 活化的可行性和潜在益处。