Copper-Catalyzed Asymmetric Cyanation of Alkenes via Carbonyl-Assisted Coupling of Alkyl-Substituted Carbon-Centered Radicals
作者:Song Zhou、Guoyu Zhang、Liang Fu、Pinhong Chen、Yibiao Li、Guosheng Liu
DOI:10.1021/acs.orglett.0c02085
日期:2020.8.21
the first copper-catalyzed asymmetric cyanation of alkyl-substituted alkenes has been developed. The reaction, featuring mild reaction conditions and excellent functional group compatibilities, provides an easy access to a wide array of structurally diverse enantioenriched alkyl nitriles in good yields. Notably, an unstable carbon-centered radical generated by trifluoromethyl radical addition across terminal
METHODS AND COMPOSITIONS FOR MODULATING RHO-MEDIATED GENE TRANSCRIPTION
申请人:Neubig Richard
公开号:US20120252792A1
公开(公告)日:2012-10-04
The invention provides methods, compositions, and kits for the inhibition of members of the Rho GTPase family. Specifically, the invention provides methods, compositions and kits for the inhibition of RhoA and/or RhoC transcriptional signalling. The invention finds use in treatment of Rho-mediated disease states (e.g., tumor metastasis, inflammation, inflammatory disease), Rho-mediated biological conditions, and in cell signaling research.
Copper-Catalyzed Hydroxyperfluoroalkylation of Unactivated Alkenes: Access to β-Perfluoroalkyl Alcohols
作者:Luqing Tang、Cancan Feng、Fan Yang、Yangjie Wu
DOI:10.1021/acs.orglett.3c00651
日期:2023.4.28
An expeditious copper-catalyzed three-component hydroxyperfluoroalkylation of unactivated alkenes starting from commercially available perfluoroalkyliodides and an O2 molecule from air as the oxygen source was developed. The Cu/B2pin2 catalytic system offered a novel pattern for the generation of perfluoroalkyl radicals and overcame the previous limitations in the hydroxyperfluoroalkylation of unactivated
以市售的全氟烷基碘和来自空气的 O 2分子作为氧源,开发了一种快速的铜催化的未活化烯烃的三组分羟基全氟烷基化反应。Cu/B 2 pin 2催化体系为全氟烷基自由基的产生提供了一种新的模式,并克服了先前在未活化烯烃的羟基全氟烷基化中的局限性。该催化方案具有高区域选择性和广泛的底物范围,可以方便地获得有价值的 β-全氟烷基醇。18 O标记实验表明,OH基团的氧原子来源于空气中的O 2。
Design, synthesis and prostate cancer cell-based studies of analogs of the Rho/MKL1 transcriptional pathway inhibitor, CCG-1423
作者:Chris R. Evelyn、Jessica L. Bell、Jenny G. Ryu、Susan M. Wade、Andrew Kocab、Nicole L. Harzdorf、H.D. Hollis Showalter、Richard R. Neubig、Scott D. Larsen
DOI:10.1016/j.bmcl.2009.11.056
日期:2010.1
We recently identified bis(amide) CCG-1423 (1) as a novel inhibitor of RhoA/C-mediated gene transcription that is capable of inhibiting invasion of PC-3 prostate cancer cells in a Matrigel model of metastasis. An initial structure-activity relationship study focusing on bioisosteric replacement of the amides and conformational restriction identified two compounds, 4g and 8, with improved selectivity for inhibition of RhoA/C-mediated gene transcription and attenuated cytotoxicity relative to 1. Both compounds were also capable of inhibiting cell invasion with equal efficacy to 1 but with less attendant cytotoxicity. (C) 2009 Elsevier Ltd. All rights reserved.
Reaction of organozinc halides with aryl isocyanates
作者:Haoran Yang、Danfeng Huang、Ke-Hu Wang、Changming Xu、Teng Niu、Yulai Hu
DOI:10.1016/j.tet.2013.01.053
日期:2013.3
Reformatsky reagent, benzylzinc bromide or alkylzinc iodides react with arylisocyanates directly to give corresponding N-substituted carbamates under mild reaction conditions. However, the reaction of allylzinc bromide or propargylzinc bromide with arylisocyanates produces the corresponding N-substituted amides. The reactions provide alternative methods for the synthesis of N-substituted carbamates