Efficient syntheses of the novel, pyrene containing branched building blocks 10, 13, 22, 25 and of a pyrene based core molecule 16 for the construction of dendrimers are reported. The main tool is a Suzuki cross-coupling. The functional groups for further growth are amines and carboxylic acids, which were used in an orthogonally protected fashion. It was proven that the building blocks could be assembled to a low generation dendrimer 17.
An Amine Functionalized Metal–Organic Framework as an Effective Catalyst for Conversion of CO<sub>2</sub> and Biginelli Reactions
作者:Ashish Verma、Dinesh De、Kapil Tomar、Parimal K. Bharadwaj
DOI:10.1021/acs.inorgchem.7b01286
日期:2017.8.21
could be easily removed along with the guest molecules in the lattice uponactivation to afford the desolvated framework 1′. This produced exposed metalsites that, along with the pendant amine groups incorporated in the ligand, generated a coordination space in the framework to make it an outstanding heterogeneous catalyst for the chemical fixation of CO2 with various epoxides under atmospheric pressure
<i>The ortho</i>and<i>meta</i>Magnesiation of Functionalized Anilines and Amino-Substituted Pyridines and Pyrazines at Room Temperature
作者:Gabriel Monzón、Ilaria Tirotta、Paul Knochel
DOI:10.1002/anie.201205465
日期:2012.10.15
A practical ortho,meta, (or even ortho,ortho′) magnesiation of trifluoroacetamides of anilines, aminopyridines, and aminopyrazines at room temperature was performed with TMPMgCl⋅LiCl or TMP2Mg⋅2 LiCl. These magnesiations are compatible with several carbonyl functionalities and allow access to polysubstituted anilides in satisfactory yields.
Palladium-Catalyzed Annulation of Internal Alkynes: Direct Access to π-Conjugated Ullazines
作者:Danyang Wan、Xiaoyu Li、Ruyong Jiang、Boya Feng、Jingbo Lan、Ruilin Wang、Jingsong You
DOI:10.1021/acs.orglett.6b01182
日期:2016.6.17
rroles with alkynes has been developed to construct various π-conjugated indolizino[6,5,4,3-ija]quinolones (ullazines) with a reactive functional group tolerance. As illustrative examples, three new ullazine-based sensitizers are synthesized, and the performance of these dyes is examined in DSSC devices, which demonstrates the potential of direct C–H functionalization in the construction of organic
已开发了钯(1-(2,6-二溴苯基)-1 H-吡咯与炔烃的环化反应),以构建各种π-共轭吲哚并[6,5,4,3- ja ]喹诺酮(戊嗪),反应性官能团耐受性。作为说明性例子,合成了三种新的基于脲嗪的敏化剂,并在DSSC装置中检查了这些染料的性能,证明了在有机光电子材料构造中直接C–H功能化的潜力。
Palladium- and Nickel-Catalyzed Cross-Couplings of Unsaturated Halides Bearing Relatively Acidic Protons with Organozinc Reagents
作者:Georg Manolikakes、Carmen Muñoz Hernandez、Matthias A. Schade、Albrecht Metzger、Paul Knochel
DOI:10.1021/jo8015852
日期:2008.11.7
aryl, heteroaryl, alkyl, and benzylic zinc reagents were coupled with unsaturated aryl halides bearing an acidic NH or OH proton, using Pd(OAc)2 (1 mol %) and S-Phos (2 mol %) as catalyst without the need of protecting groups. A similar nickel-catalyzed reaction is described. The relative kinetic basicity of organozinc compounds as well as their stability toward acidic protons is also described.