Direct annulation and alkylation of indoles with 2-aminobenzyl alcohols catalyzed by TFA
摘要:
An efficient method for the annulation of indoles with 2-aminobenzyl alcohols, catalyzed by TFA, to furnish 5,6-fused indoline aminals is reported. This method can be extended to the alkylation of indoles at C3. 2-Aminobenzyl alcohols are used directly without recourse to protection of the aniline nitrogen or activation of the alcohol. (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis, Characterization, and Symmetry Relations of the Crystal Structures of Some Bis(dioxane) Adducts of Group 1 / Group 13 Heterometallic Trifluoroacetates
作者:Daniel Czajkowski、Ilka Simon、Walter Frank
DOI:10.1002/zaac.201800470
日期:2019.2.28
moisture sensitive solids are composed of dimeric structural moieties with site symmetry 1, containing alkali metal ions and bis(dioxane)tetrakis(trifluoroacetato)indate or ‐gallateions. The dimeric units are further connected by weaker “intermolecular” dioxane interactions to neighboring alkali metal ions. Closer inspection of space group symmetry, unit cell parameters and atom sites allows to rationalize
混合金属三氟乙酸盐的四个双(二恶烷)加合物M [ M '(O 2 CCF 3)4(C 4 H 8 O 2)2 ](M = Na,K,Cs,M '= In和M = Cs ,M通过碱金属三氟乙酸盐和13族元素三氟乙酸盐在1,4-二恶烷中的反应合成了′= Ga),并进行了包括X射线结构测定在内的完整表征。几何参数,经验键合价和对称C = O拉伸振动的频率表明,湿敏性固体由位点对称的二聚结构部分组成1,含有碱金属离子和双(二恶烷)四(三氟乙酰基)indate或gallate离子。二聚体单元还通过较弱的“分子间”二恶烷相互作用与相邻的碱金属离子相连。仔细检查空间基团的对称性,晶胞参数和原子位点,可以合理地将化合物合理化为两个同型对的成员,这两个同型对由于其单斜位空间基团与常见的正交超基团之间的亚群关系而进一步紧密相关。
Carboranyl derivatives of group III non-transition metals
作者:V. I. Bregadze、A. Ya. Usyatinskii、V. Ts. Kampel'、L. M. Go'lubinskaya、N. N. Godovikov