位点选择性功能化反应的进步使得复杂分子外围的单个原子发生变化,但在分子核心框架上实现这种变化的反应流形仍然稀疏。在这里,我们公开了一种在环状二芳基甲烷和二芳基酮中碳氧取代以产生环状二芳基醚的策略。氧原子插入是通过亚甲基和拜尔-维利格氧化完成的。为了去除这种 C 到 O“原子交换”过程中的碳原子,我们开发了一种镍催化的内酯脱羰基反应,以产生相应的环状二芳基醚。该反应是通过化学计量镍 ( II ) 络合物的机理研究实现的,从而优化了能够促进具有挑战性的 C(sp 2 )–O(芳基) 还原消除的配体。镍催化脱羰作用适用于 6-8 元内酯(16 个实例,32-99%)。最后,在天然产物和药物前体上完成了 C 到 O 原子交换反应序列。
Tetradentate Platinum And Palladium Complex Emitters Containing Phenyl-Pyrazole And Its Analogues
申请人:Li Jian
公开号:US20150194616A1
公开(公告)日:2015-07-09
A phosphorescent emitter or delayed fluorescent and phosphorescent emitters represented by Formula 1 or Formula II, where M is platiunum or palladium.
一个磷光发射器或延迟荧光和磷光发射器,由公式1或公式II表示,其中M是铂或钯。
N‐Atom Deletion in Nitrogen Heterocycles
作者:Haitao Qin、Wangshui Cai、Shuang Wang、Ting Guo、Guigen Li、Hongjian Lu
DOI:10.1002/anie.202107356
日期:2021.9.13
Examples are provided of deletion of nitrogen from natural products, synthesis of chiral O-heterocycles from commercially available chiral β-aminoalcohols, formal inert C−H functionalization through a sequence of N-directed C−H functionalization and N-atom deletion reactions in which the N-atom can serve as a traceless directing group.
切除仲胺中的氮并将两个残留片段偶联起来是一种骨架编辑策略,可用于构建具有新骨架的分子,但在很大程度上尚未被探索。在这里,我们报告了一种从 N-杂环中切除 N-原子的通用方法。该过程使用容易获得的 N-杂环作为底物,并通过 N-磺酰叠氮作用进行,然后氨磺酰叠氮化物中间体的重排,提供各种环状产物。提供了从天然产物中删除氮、从市售手性 β-氨基醇合成手性 O-杂环、通过一系列 N 导向的 CH 官能化和 N 原子缺失反应的形式惰性 CH 官能化的例子其中 N 原子可以作为一个无痕导向群。
POLYMERIZABLE COMPOUND AND OPTICAL ISOMER
申请人:DIC Corporation
公开号:US20180022716A1
公开(公告)日:2018-01-25
The present invention provides a polymerizable compound having high storage stability without causing crystal precipitation when added to a polymerizable composition. The present invention also provides a polymerizable composition containing the compound. When the filmy polymer produced through polymerization of the polymerizable composition is irradiated with UV light, it hardly discolors or peels from substrate. Further, the present invention provides a polymer produced through polymerization of the polymerizable composition and an optically anisotropic body using the polymer.
[EN] POLYMERIZABLE COMPOUND AND OPTICALLY ANISOTROPIC BODY<br/>[FR] COMPOSÉ POLYMÉRISABLE ET CORPS OPTIQUEMENT ANISOTROPE
申请人:DAINIPPON INK & CHEMICALS
公开号:WO2017079867A1
公开(公告)日:2017-05-18
There is provided a polymerizable composition, by which discoloration or alignment defects are less likely to occur when a filmy polymer, which is obtained by adding a polymerizable compound to the polymerizable composition and polymerizing this composition, is irradiated with ultraviolet light. There are also provided a polymer obtained by polymerizing the polymerizable composition, and an optically anisotropic body using the polymer. The present invention provides a polymerizable low-wavelength dispersive or polymerizable reverse-wavelength dispersive compound having a partial structure represented by Formula (Z-0). Further, the present invention provides a composition containing the compound; a polymer obtained by polymerizing the composition; and an optically anisotropic body obtained by using the polymer.