scope of aliphatic carboxylic anhydrides and tolerates synthetically useful aromatic substituents. Assisted by a redox system of pyridine N-oxide and zinc additives, the current reaction occurs under mild conditions and without the assistance of photocatalyst. Notably, this method features high chemoselectivity toward alkyl migration with mixed aliphatic/aromatic anhydrides. Thus, it provides a powerful
Recyclable, Strong, and Highly Malleable Thermosets Based on Boroxine Networks
作者:William A. Ogden、Zhibin Guan
DOI:10.1021/jacs.8b03257
日期:2018.5.23
unable to reprocess and are difficult to recycle. Small molecule boroxines have been shown to undergo a reversible exchange reaction. Herein we employ boroxine as dynamic cross-links to construct a novel type of thermoset material that is strong, highly malleable, and recyclable. The synthesis and dynamic mechanical properties of boroxine networks are described. Upon heating in water the material can
PROCESS FOR PRODUCTION OF BIS-QUATERNARY AMMONIUM SALT, AND NOVEL INTERMEDIATE
申请人:Okamoto Kuniaki
公开号:US20120130107A1
公开(公告)日:2012-05-24
Object To provide a method for producing a bis-quaternary ammonium salt efficiently and a novel synthetic intermediate thereof.
Solution The present invention relates to a method for producing a bis-quaternary ammonium salt represented by a general formula [3] which comprises reacting a disulfonic acid ester represented by a general formula [1] (in the formula, definitions of two R
1
's and T are as described in claim
1
) with a tertiary amine represented by a general formula [2] (in the formula, definitions of R
3
to R
5
are as described in claim
1
), and a disulfonic acid ester represented by a general formula [1′] (in the formula, two R
16
's represent independently a halogen atom or a C1-C3 fluoroalkyl group, and two m's represent independently an integer of 1 to 5).
Iron(III)-Catalyzed Ortho-Preferred Radical Nucleophilic Alkylation of Electron-Deficient Arenes
作者:Fei Yu、Ting Wang、Huan Zhou、Yajun Li、Xinhao Zhang、Hongli Bao
DOI:10.1021/acs.orglett.7b03244
日期:2017.12.15
ortho-preferred, radical alkylation of electron-deficient (hetero)arenes is reported. A variety of electron-deficient arenes were shown to react with various primary alkyl sources, producing the alkylated (hetero)arenes in good yields. This reaction might be an alkyl radical, nucleophilic aromatic substitution reaction, rather than the traditional electrophilic Friedel–Crafts reaction. HOMO–LUMO analysis and
Sunfish Amphiphiles: Conceptually New Carriers for DNA Delivery
作者:Ron Hulst、Inouk Muizebelt、Peter Oosting、Cornelia van der Pol、Anno Wagenaar、Jarmila Šmisterová、Erna Bulten、Cecile Driessen、Dick Hoekstra、Jan B. F. N. Engberts
DOI:10.1002/ejoc.200300524
日期:2004.2
A conceptuallynew class of cationic amphiphiles, Sunfishamphiphiles, designed for the delivery of genes into cells is introduced. Sunfishamphiphiles have two hydrophobic tails, connected at the 4- and the N-position to the cationic pyridinium headgroup. Two extreme morphologies visualised by backfolding and combining of both tails at one site (matching situation) or unfolding of the tails at distinct