A pincer-type Ru(II)-NNP complex bearing a pyrazolyl-(NH-PtBu2)-pyridine ligand was synthesized and structurally characterized by NMR, IR, elemental analysis, and X-ray single-crystal crystallographic determinations, which efficiently catalyzed the synthesis of multisubstituted pyrroles and pyridines by means of the reactions of secondary alcohols and β- or γ-amino alcohols through deoxygenation and
合成了带有吡唑基-(NH-P t Bu 2)-吡啶配体的钳型Ru(II)-NNP络合物,并通过NMR,IR,元素分析和X射线单晶晶体学测定对其结构进行了表征,通过仲醇与β-或γ-氨基醇的脱氧反应以及选择性C–N和C–C键的形成,有效地催化了多取代吡咯和吡啶的合成。偶联反应以0.3mol%的催化剂负载量和容许的各种官能团进行。本工作提供了一种从容易获得的配体中构建高活性过渡金属配合物催化剂的替代方法。
Synthesis of multi-substituted pyrroles using enamides and alkynes catalyzed by Pd(OAc)<sub>2</sub>with molecular oxygen as an oxidant
作者:Yun-He Xu、Tao He、Qiu-Chi Zhang、Teck-Peng Loh
DOI:10.1039/c3cc49683j
日期:——
A cyclization reaction between enamides and alkynes catalyzed by palladium(II) acetate is described. In this method, the molecular oxygen serves as an efficient oxidant for the Pd(II)/Pd(0) catalytic cycle. The simple reaction conditions permit this methodology to be used as a general tool for the preparation of multi-substituted pyrroles.
A robust NNP‐type ruthenium (II) complex for alcohols dehydrogenation to esters and pyrroles
作者:Huining Chai、Guangyao Zhang、Weiqiang Tan、Jiping Ma
DOI:10.1002/aoc.5367
日期:2020.2
(II) complex bearing pyridyl‐based benzimidazole‐phosphine tridentate NNP ligand was synthesized and structurally characterized by NMR, IR. The complex can efficiently and selectively catalyze the acceptorless dehydrogenation of primary alcohols to esters under relatively mild conditions and the synthesis of pyrroles by means of the reactions of secondary alcohols and β‐amino alcohols through acceptorless
Rhodium-Catalyzed Oxidative Cycloaddition of <i>N</i>
-<i>tert</i>
-Butoxycarbonylhydrazones with Alkynes for the Synthesis of Functionalized Pyrroles <i>via</i>
C(<i>sp</i>
<sup>3</sup>
)-H Bond Functionalization
作者:Chun-Ming Chan、Zhongyuan Zhou、Wing-Yiu Yu
DOI:10.1002/adsc.201600900
日期:2016.12.22
The reaction features a regioselective α‐imino alkyl C(sp3)−H bond functionalization resulting in selective formation of highlyfunctionalized NH‐free pyrroles. Our studies showed that utilizing the N‐tert‐butoxycarbonyl (N‐Boc) as the oxidizing directing group is critical for achieving the observed pyrrole formation versus the isoquinoline formation. To account for the pyrrole formation, we hypothesized
Rao, H Surya Prakash; Gorityala, Bala Kishan; Vasantham, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2007, vol. 46, # 9, p. 1470 - 1474
作者:Rao, H Surya Prakash、Gorityala, Bala Kishan、Vasantham