254-60-4Relevant articles and documents
Metal-free stereoselective annulation of quinolines with trifluoroacetylacetylenes and water: An access to fluorinated oxazinoquinolines
Trofimov,Belyaeva,Nikitina,Afonin,Vashchenko,Muzalevskiy,Nenajdenko
, p. 2268 - 2271 (2018)
Metal-free reaction between quinolines, aryltrifluoroacetylacetylenes and water at -18 °C-rt in MeCN resulted in stereoselective assembly of trifluoromethylated oxazinoquinolines with up to 99% yield that was essentially in contrast to a similar reaction with pyridines. The annulation proceeded via the 1,3-dipolar adducts of quinolines with trifluoroacetylacetylenes followed by intramolecular cyclization involving the trifluoroacetyl group and a molecule of water.
Crystal Structure of 1,8-Naphthyridinium-(1)-tetraphenylborate - Flattening of a Distorted Molecular Skeleton by Protonation (Short Comm.)
Bock,Van,Schoedel
, p. 391 - 396 (1996)
Contrary to the usual pyramidalization of nitrogen electron pair centers, the spatially distorted molecular skeleton of 1,8-naphthyridin is planarized upon protonation.
Acid/base-controllable fluorescent molecular switches based on cryptands and basic N-heteroaromatics
Cheng, Ming,Zhang, Jing,Ren, Xintong,Guo, Shuwen,Xiao, Tangxin,Hu, Xiao-Yu,Jiang, Juli,Wang, Leyong
supporting information, p. 11838 - 11841 (2017/11/03)
Two kinds of fluorescent BMP32C10-based cryptands 1 and 2 have been developed. Cryptand 1 contains a binaphthol group, while cryptand 2 bears a coumarin group in their third arms. Based on this design, novel self-assemblies constructed from cryptand 1 or 2 and basic N-heteroaromatic guests 3-6 were successfully obtained. Moreover, the threading/dethreading processes of the host-guest complexes could be well switched by the alternate addition of acid/base, and accompanied by concurrent changes in fluorescence.
Selective synthesis of nitrogen bi-heteroarenes by a hydrogen transfer-mediated direct α,β-coupling reaction
Chen, Xiu-Wen,Zhao, He,Xiong, Biao,Jiang, Huan-Feng,Dixneuf, Pierre. H.,Zhang, Min
supporting information, p. 6093 - 6097 (2017/08/02)
By an external hydrogen transfer-mediated activation mode, we herein demonstrate a new palladium-catalyzed direct α,β-coupling of different types of N-heteroarenes. Such a selective coupling reaction proceeds with the advantages of operational simplicity,