Novel 1,3-dialkyl-1,2,3-triazolium ionic liquids were synthesized via click reactions using 1-trimethylsilylacetylene and alkyl azides and were efficient reaction media for the Baylis-Hillman reaction. The problems associated with deprotonation of the C-2 hydrogen of [bmim][PF(6)] could be suppressed in the reaction of [bmTr][PF(6)] or [bmTr][NTf(2)]. 1,3-Dialkyl-1,2,3-triazolium ionic liquids are chemically inert under basic conditions and more suitable media for the reactions involving bases than the common 1,3-dialkylimidazolium ionic liquids.

Electronic textile (e-textile) allows for high-end wearable electronic devices that provide easy access for carrying, handling and using. However, the related technology does not seem to be mature because the woven fabric hampers not only the device fabrication process directly on the complex surface but also the transfer printing of ultrathin planar electronic devices. Here we report an indirect method that enables conformal wrapping of surface with arbitrary yet complex shapes. Artificial cilia are introduced in the periphery of electronic devices as adhesive elements. The cilia also play an important role in confining a small amount of glue and damping mechanical stress to maintain robust electronic performance under mechanical deformation. The example of electronic applications depicts the feasibility of cilia for ‘stick-&-play' systems, which provide electronic functions by transfer printing on unconventional complex surfaces.

The SO 3 H-tethered imidazolium and triazolium salts, nonvolatile and recyclable Brønsted acidic ionic liquids, efficiently mediate intramolecular hydroalkoxylations of alkenyl alcohols. They have been successfully employed in the synthesis of (±)-centrolobine.Substituted tetrahydrofurans and tetrahydropyrans are frequently found in many cyclic ether antibiotics and other biologically active natural products. 1 One of the most straightforward synthetic approaches to these oxygen heterocycles is intramolecular hydroalkoxylation/cycloisomerization of unsaturated alcohols. 2 In particular, the intramolecular insertions of the O-H bonds across the unactivated C C bond have drawn wide attention due to their high atom economy and synthetic efficiency. Recently, it was reported that intramolecular hydroalkoxylation of unactivated olefins could be promoted by Brønsted acid, 3,4 lanthanide, 5 platinum, 6 palladium, 7 aluminium, 8 gold, 9 silver, 10 copper, 11 iron, 12 ruthenium, 13 and rhodium 14 catalysts with varying degrees of success.Although the acid-catalyzed intramolecular hydroalkoxylation of alkenyl alcohols has been reported for catalytic TfOH, 3 it occurs mainly with over-stoichiometric amounts of acid. 4 Because of environmental concerns associated with highly acidic reagents or reaction media, the development of environmentally benign and recyclable reagents has become a crucial and demanding area. In recent years, ionic liquids 15 (ILs) have attracted increasing interest as recyclable solvents or catalysts. Particularly, Brønsted acidic ILs are recognized as potential alternatives to conventional acid catalysts due to their non-volatile and recyclable properties. Therefore, their applications have been extended to esterification, 16 nitration, 17 Diels-Alder reaction, 18 and hydroamination. 19 Relevant to the development of green reagents for the synthesis of oxygen heterocycles, we describe herein intramolecular hydroalkoxylation of alkenyl alcohols in recyclable Brønsted acidic ILs. This protocol also has been successfully applied to the synthesis of (±)-centrolobine.

A tandem protocol for the synthesis of fluorinated isoxazoles has been developed via catalytic intramolecular cyclizations of 2-alkynone O-methyl oximes and ensuing fluorination. The reactions proceed smoothly at room temperature in the presence of 5 mol % of (IPr)AuCl, 5 mol % of AgOTs, 2.5 equiv of Selectfluor, and 2 equiv of NaHCO3. This process features an efficient one-pot cascade route to fluoroisoxazoles with high yields and high selectivity under mild reaction conditions.

Introducing two-dimensional post arrays and a water-soluble sacrificial layer between an ultrathin substrate and a handling substrate provides controllability of the interfacial adhesion in a stable manner. The periodically anchored and suspended configuration after the chemical etching process facilitates the development of, for example, printable Alq3 -based OLEDs that can be attached to unconventional surfaces.