17 Aug 08:45
by Gaowen Zhai,
Xueting Liu,
Wentao Ma,
Guoqiang Wang,
Liu Yang,
Shuhua Li,
Youting Wu,
Xingbang Hu
One‐pot Friedel‐Crafts and C−H/C−O coupling reactions catalyzed by B(C6F5)3 were achieved for the reactions between a series of dialkylanilines and vinyl ethers with good isolated yields. The possible reaction mechanism was proposed based on theoretical and experimental studies.
Abstract
Tandem Friedel‐Crafts (FC) and C−H/C−O coupling reactions catalyzed by tris(pentafluorophenyl) borane (B(C6F5)3) were achieved without using any other additive in the absence of solvent. This process can be used for the reactions between a series of dialkylanilines and vinyl ethers with good isolated yields of bis(4‐dialkylaminophenyl) compounds. Based on combined theoretical and experimental studies, the possible reaction mechanism was proposed. B(C6F5)3 can activate the C=C and C−O bond for FC and C−H/C−O coupling reactions respectively. The FC reaction is slow, which is followed by a fast C−H/C−O coupling.
14 Apr 08:41
We describe a
systematic investigation of carbon dots (C-dots) assemblies fabricated at the
liquid/air interface because of the surface tension gradient. This gradient is
originally created by capillary action and increased by addition of sodium
dodecyl sulfate (SDS) surfactant or
1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) phospholipid to the
surface of C-dots aqueous mixture. The
arrangement of carbon dots in liquid bulk phase (before self-assembly) and at
the surface region (after self-assembly) was examined by TEM microscopy. The
presence of SDS surfactant and POPC phospholipid at the air/water interface
induced the C-dots compression. In addition, molecular dynamics simulation was conducted
to obtain the structure of C-dots at liquid/vapor interface. The orientation of
C-dots is evaluated quantitatively at water/vapor surface by using bivariate
analysis.
18 Feb 16:47
by Timon Kurzawa, Klaus Harms and Ulrich Koert
Organic Letters
DOI: 10.1021/acs.orglett.8b00163
09 Jan 11:49
by Marion Beguerie, Chiara Dinoi, Iker del Rosal, Charly Faradji, Gilles Alcaraz, Laure Vendier and Sylviane Sabo-Etienne
ACS Catalysis
DOI: 10.1021/acscatal.7b03461
17 May 05:54
by C. Vance Thompson, Hadi D. Arman and Zachary J. Tonzetich
Organometallics
DOI: 10.1021/acs.organomet.7b00350