Synthesis of substituted 6H-benzo[c]chromenes: a palladium promoted ring closure of diazonium tetrafluoroborates
作者:Jing Zhou、Liang-Zhu Huang、You-Qiang Li、Zhen-Ting Du
DOI:10.1016/j.tetlet.2012.10.038
日期:2012.12
A highly efficient palladium-catalysed phenyl diazonium tetrafluoroborate participation of C-H activation ring closure protocol has been developed. A series of 6H-benzo[c]chromenes have been synthesized by intramolecular cyclization of ortho diazonium salts tetrafluoroborate of benzyloxyphenyl (Method A), or phenoxymethyl phenyl (Method B). The transformation allows the synthesis of 6H-benzo[c]chromenes with a wide variety of functional groups and substitution patterns from simple and easily accessible precursors. Crown Copyright (c) 2012 Published by Elsevier Ltd. All rights reserved.
Chemoselective hydrogenation of nitrobenzyl ethers to aminobenzyl ethers catalyzed by palladium–nickel bimetallic nanoparticles
作者:Wenwen Chen、Hailin Bao、Dingsheng Wang、Xinyan Wang、Yadong Li、Yuefei Hu
DOI:10.1016/j.tet.2015.10.037
日期:2015.12
A highly efficient and chemoselective hydrogenation of nitrobenzyl ethers to aminobenzyl ethers was developed by using a novel palladium nickel bimetallic nanocatalyst. Since the catalytic selectivity was resulted from the synergistic effects between two metals rather than the traditional catalyst poisons, the hydrogenation proceeded smoothly under additive-free conditions. Thus, the work-up procedure was as simple as to recover the catalyst by a magnetic separation and then to evaporate the solvent. (C) 2015 Elsevier Ltd. All rights reserved.
[EN] INHIBITORS OF HIV REPLICATION<br/>[FR] INHIBITEURS DE LA RÉPLICATION DU VIH
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2011143772A1
公开(公告)日:2011-11-24
Compounds of formula (I) wherein R1, R2, n and R3 are defined herein, are useful as inhibitors of HIV replication.
Cavill et al., Journal of the Chemical Society, 1958, p. 1544,1548