Investigation on Amino-Heck Cyclization of 1-(2-Vinylcyclohexyl)ketone Diethyl Phosphinyloximes
摘要:
Upon the treatment with Pd(PPh3)4 and Et3N in DMF at 80 degrees C, a range of trans-1-(2-vinylcyclohexyl)-substituted ketone diethylphosphinyloximes underwent the cyclization in a 6-endo pathway to afford 1-substituted tetrahydroisoquinolines in varying yields. Among which, the reactions of the substrates bearing the saturated alkyl groups were severely competed by hydrolysis and/or Beckmann rearrangement, while these undesired side reactions could be suppressed by introducing a beta-aryl moiety possibly due to the stabilizing pi-pi stacking interactions between the phosphoryl and/or vinyl group and the aryl rings.
SILICON BASED DRUG CONJUGATES AND METHODS OF USING SAME
申请人:BlinkBio, Inc.
公开号:US20170202970A1
公开(公告)日:2017-07-20
Described herein are silicon based conjugates capable of delivering one or more payload moieties to a target cell or tissue. Contemplated conjugates may include a silicon-heteroatom core, one or more optional catalytic moieties, a targeting moiety that permits accumulation of the conjugate within a target cell or tissue, one or more payload moieties (e.g., a therapeutic agent or imaging agent), and two or more non-interfering moieties covalently bound to the silicon-heteroatom core.
Substituted 2-[monoannelated (3,4-,4,5-, and 5,6-)
申请人:The Upjohn Company
公开号:US05077407A1
公开(公告)日:1991-12-31
The present invention provides novel substituted 2-[monoannelated(3,4- 4,5-, and 5,6-)pyridylalkylenesulfinyl]-benzimidazoles with gastric acid inhibiting effects.
Diboron-mediated rhodium-catalyzed transfer hydrogenation of functionalized arenes is reported. In addition to good functional group tolerance, the reaction features operational simplicity and controllable chemoselectivity. The general applicability of this procedure is demonstrated by the selective hydrogenation of a range of arenes, including functionalized benzenes, biphenyls, and polyaromatics
作者:Justin A. Hilf、Michael S. Holzwarth、Scott D. Rychnovsky
DOI:10.1021/acs.joc.6b01370
日期:2016.11.4
Pyridine rings are common structural motifs found in a number of biologically active compounds, including some top-selling pharmaceuticals. We have developed a new approach to access substituted pyridines. The method aims to provide a reliable synthesis of a diverse range of substituted pyridines through a three-step procedure. Readily available enones are first converted into 1,5-dicarbonyls through