Head-to-tail homo- and heterodimerization of vinylamides by hidden proton catalysis
摘要:
Chemoselective dimerization of vinylamides is reported. A number of vinylacylamides were shown to undergo stereoselective cationic intermolecular head-to-tail homodimerization. Correspondingly, chemoselective heterodimerization reactions readily afforded hydroalkenylation of vinylacylamide with vinylsulfonamide. Different mild methods for hidden proton catalysis were studied. The in situ generation of, e.g., HSbF6 from the [Au]SbF6-PhC equivalent to CHI catalytic systems was applied. Successful vinylacylamide head-to-tail dimerizations seem to be dependant on the ability of N-C-O acylamide electron delocalization, affording stabilized intermediates. In general, the reactions demonstrate the ability of vinylacylamides to effectively undergo hydroalkenylation to afford 1,3-N,N-functionalized (E)-but-1-ene products. (C) 2013 Elsevier Ltd. All rights reserved.
PYRIMIDINE COMPOUNDS AS DELTA OPIOID RECEPTOR MODULATORS
申请人:COATS STEVEN J.
公开号:US20110105520A1
公开(公告)日:2011-05-05
Disclosed are compounds, compositions and methods for treating various diseases, syndromes, conditions and disorders, including pain. Such compounds are represented by Formula I as follows:
wherein R
1
, R
2
, R
3
, and L, A, and R
a
are defined herein.
Copolymers Based on N-Vinylpyrrolidone and Branched Aliphatic Carbonxylic Acids, and Their Use as Solubilizers
申请人:Angel Maximilian
公开号:US20080200564A1
公开(公告)日:2008-08-21
Copolymers comprising: (a) 60 to 99% by weight of at least one monomer selected from the group consisting of N-vinyllactams, N-vinylamides, and mixtures thereof; (1) 1 to 40% by weight of at least one monomer selected from the group consisting of vinyl esters of aliphatic branched C
8
-C
30
-carboxylic acids; (c) 0 to 30% by weight of vinyl acetate; and (d) 0 to 39% by weight of at least one additional free-radically copolymnerizable monomer; wherein the % by weight content of components (a), (b), (c) and (d) totals 100%, and with the proviso that the total amount of component (b) and component (c) combined is 1 to 40% by weight based on the copolymer, are described along with methods of using such copolymers to solubilize substances which are insoluble in water, substances which are only sparingly soluble in water, and combinations thereof.
CH Functionalization of Enamides: Synthesis of β-Amidovinyl Sulfones<i>via</i>Visible-Light Photoredox Catalysis
作者:Heng Jiang、Xuejiao Chen、Yan Zhang、Shouyun Yu
DOI:10.1002/adsc.201200874
日期:2013.3.11
prepare β‐amidovinyl sulfones has been developed based on the sulfonation of enamides or enecarbamates via visible‐light photoredoxcatalysis. Direct CHfunctionalizations of enamides or enecarbamates under the optimized conditions proceeded with a wide scope of substrates and remarkable selectivity to give functionalized vinyl sulfones with good to excellent yields.
[EN] HEMI-AMINAL ETHERS AND THIOETHERS OF N-ALKENYL CYCLIC COMPOUNDS<br/>[FR] ÉTHERS ET THIOÉTHERS HÉMIAMINAUX DE COMPOSÉS CYCLIQUES N-ALCÉNYLIQUES
申请人:ISP INVESTMENTS INC
公开号:WO2014116560A1
公开(公告)日:2014-07-31
Described herein are hemi-aminal ethers and thioethers of N-alkenyl cyclic compounds that may be produced through a reaction comprising: (A) at least one first reactant represented by a structure (I), wherein X is a functionalized or unfunctionalized C1-C5 alkylene group optionally having one or more heteroatoms, and each R1, R2, and R3 is independently selected from the group consisting of hydrogen and functionalized and unfunctionalized alkyl groups optionally having one or more heteroatoms, and (B) at least one second reactant having at least one hydroxyl moiety or thiol moiety. The hemi-aminal ethers and thioethers of N-alkenyl cyclic compounds may comprise a polymerizable moiety, in which case they may be left as-is or used to create homopolymers or non-homopolymers, or they may not comprise a polymerizable moiety. A wide variety of formulations may be created using the hemi-aminal ethers and thioethers of N-alkenyl cyclic compounds, including personal care, oilfield, and construction formulations.
A process for preparing an N-vinyl compound by vinylating a compound having at least one nitrogen atom (referred to hereinafter as compound for short) with acetylene, wherein
before the vinylation, the compound is reacted with an alkali metal hydroxide in a reaction zone and
the mean residence time of the alkali metal hydroxide and of the compound in the reaction zone is less than 6 minutes.