series of boron ketoiminate derivatives that exhibited clear aggregation‐induced emission (AIE) characteristics (in THF: ΦPL≤0.01; in the solidstate: ΦPL=0.30–0.76) were prepared by the reactions of 1,3‐enaminoketone derivatives with boron trifluoride–diethyl etherate. The structures and optical properties were investigated by UV‐visible spectroscopy, photoluminescent (PL) spectroscopy, and X‐ray
Chemodivergent Synthesis of Benzofurans and 2,<scp>3‐Dihydrobenzofurans</scp> via Tandem Oxidative Annulation of Enaminones and Salicylaldehydes
作者:Xiyan Duan、Hui Li、Junqi Wang、Kun Liu、Meixin Shi、Weidong Lian、Ran Chen、Pu Liu
DOI:10.1002/cjoc.202400082
日期:——
and K2CO3 as promotors, controlled conditions enabled the formation of two sets of valuable heterocycles from the tandem transformation of enaminones and salicylaldehydes. The key to success was the identification of the reaction parameters, in which the imine intermediate which was formed by transient halogenation coupling and substitution processes underwent either aldolcondensation/annulation or
实现了苯并呋喃和2,3-二氢苯并呋喃的化学趋异合成。在以DBDMH和K 2 CO 3 为促进剂的反应体系下,控制条件使得烯胺酮和水杨醛串联转化形成两组有价值的杂环。成功的关键是反应参数的确定,其中通过瞬时卤化偶联和取代过程形成的亚胺中间体经历羟醛缩合/环化或亚胺水解/羟醛缩合。添加剂 NH 4 Cl 或 Fe 2 (SO 4 ) 3 控制了该反应的独特选择性。该反应中使用了广泛的烯胺酮和水杨醛底物,表现出优异的官能团耐受性和多功能性。
Synthesis of new fluorescent molecules having an aggregation-induced emission property derived from 4-fluoroisoxazoles
5-diarylisoxazoles led to an increase of fluorescence intensity and exhibited a redshift in the emission intensity. α-Fluorinated boron ketoiminates (F-BKIs) were also synthesized via a ring-opening reaction of 4-fluoroisoxazoles and exhibited highly fluorescent luminescence and aggregation-inducedemission (AIE), showing promise as a new fluorophore.