Palladium(II)-Catalyzed Efficient C-3 Functionalization of Indoles with Benzylic and Allylic Alcohols under Co-Catalyst, Acid, Base, Additive and External Ligand-Free Conditions
作者:Debjit Das、Sujit Roy
DOI:10.1002/adsc.201300048
日期:2013.5.3
The bis(acetonitrile)palladium(II) chloride complex, PdCl2(MeCN)2, efficiently catalyzes the regioselective alkylation of indoles with various benzylic and allylicalcohols under moisture and air insensitive conditions. Notably the reaction does not require any other co‐catalyst, acid, base, additive, or external ligand.
the indole ring in the transition state. Furthermore, comparison of initial rates in H2O and in D2O reveals an observed kinetic solvent isotope effect (KSIE = 2.7). This simple protocol, which affords the desired products with CO2 and water as the coproducts, can be achieved under mild conditions without the need for base or other additives in water.
An Efficient and General Iron-Catalyzed CC Bond Activation with 1,3-Dicarbonyl Units as a Leaving Groups
作者:Huanrong Li、Wenjuan Li、Weiping Liu、Zhiheng He、Zhiping Li
DOI:10.1002/anie.201006779
日期:2011.3.21
With our compliments: The 1,3‐dicarbonyl unit has been shown to be a new and useful leaving group for iron‐catalyzed bond cleavage (see scheme). This new strategy can complement the traditional Friedel–Crafts reaction and was applied in the synthesis of indene derivatives.
Abstract We have developed an economical and efficient method for the synthesis of medicinally and synthetically important indole-based triarylmethanes by using indoles and benzhydrols in the presence of propylphosphonic anhydride (T3P®). This methodology is an alternate approach for the C–C bond formation with good to excellent yields. In this T3P-mediated dehydration approach, the by-product is highly
Regioselective benzylation of imidazo[1,5-a]pyridines and indoles via iodine catalyzed reaction using alcohols - An approach to crystal structure prediction, DFT studies and Hirshfeld surface analysis
作者:Nagaraju Chaithra、Hassan A. Swarup、S. Chandrasekhar、B.K. Jayanna、Karthik Kumara、Kempegowda Mantelingu、N.K. Lokanath
DOI:10.1016/j.molstruc.2023.136591
日期:2024.1
crystallized in triclinic crystal system with P-1 space group. The molecular structure is stabilized by short intermolecular interactions and intramolecular C-H…N hydrogen bond interactions. The crystal structure also exhibits intermolecularC-H…π, C-Cl…π and π…π stacking interactions. The intermolecular interactions are quantified through Hirshfeld surface analysis using fingerprint plots. The surface properties
已开发出碘催化的咪唑并[1,5-a]吡啶区域选择性 C-1 苄基化反应和吲哚与二苯甲醇的 C-3 苄基化反应。这种新方案为苄基化方法的合成提供了一种有效的方案,因为它仅针对 CH 键,即使存在反应性 NH 键,并且可以合成各种苄基取代的吲哚和咪唑并[1,5-a]吡啶。功能导致在无金属条件下优雅地形成新的 CC 键。该报告代表了从固体工作台稳定的二芳基甲醇合成三(杂芳基/芳基)甲烷的温和方案。所形成的产品因其潜在的生物应用而令人感兴趣。化合物 3k 的晶体结构通过单晶 X 射线衍射研究确定。该化合物结晶为三斜晶系,空间群为P-1。分子结构通过短的分子间相互作用和分子内CH…N氢键相互作用而稳定。晶体结构还表现出分子间CH…π、C-Cl…π和π…π堆积相互作用。分子间相互作用通过赫什菲尔德表面分析使用指纹图进行量化。使用 3D Hirshfeld 曲面分析表面特性。此外,进行密度泛函理论计算以计算分子的电子性质。HOMO-LUMO