1,2,3-Triazol-5-ylidene bearing a pyridine auxiliary based bidentate PEPPSI type palladium(II) complex: Synthesis, structure, and application in the direct arylation of pyridine N-oxide
作者:Lin-Yu Jiao、Xiao-Mei Yin、Shanshan Liu、Ze Zhang、Ming Sun、Xiao-Xun Ma
DOI:10.1016/j.catcom.2019.105889
日期:2020.2
A novel PEPPSI (pyridine enhanced precatalyst preparation stabilization and initiation) typepalladium(II) complex has been synthesized and fully characterized by NMR, HR-MS, as well as elemental analysis. The molecular structure was finally confirmed by single crystal X-ray diffraction, and it revealed that the pyridyl-armed 1,2,3-triazole ligand is coordinated to the palladium in bidentate fashion
Synthesis of the dibenzopyrrocoline alkaloid skeleton: indolo[2,1-a]isoquinolines and related analogues
作者:Angelique N.C. Lötter、Rakhi Pathak、Thato S. Sello、Manuel A. Fernandes、Willem A.L. van Otterlo、Charles B. de Koning
DOI:10.1016/j.tet.2006.12.063
日期:2007.3
indole or pyrrole nucleus, aromatic rings containing a carbonyl substituent ortho to the newly formed biaryl axis were introduced using the Suzuki–Miyaura coupling reaction. Thereafter, under basic conditions the nucleophile that formed at the acidic methylene protons of the N-benzylindole, ethyl 1H-indol-1-ylacetate or N-benzylpyrrole intermediate reacted with the internalaromatic carbonyl to yield (after
吲哚[2,1- a ]异喹啉和吡咯并[2,1- a ]异喹啉核分别由N-苄基吲哚或1H-吲哚-1-基乙酸乙酯和N-苄基吡咯前体合成。首先,在吲哚或吡咯核的C-2处,使用Suzuki-Miyaura偶联反应引入了在新形成的联芳基轴上邻位有羰基取代基的芳环。此后,在碱性条件下,在N-苄基吲哚,1 H-吲哚-1-基乙酸乙酯或N的酸性亚甲基质子上形成的亲核试剂-苄基吡咯中间体与内部芳族羰基反应以产生(在排出水之后)标题化合物。例如,将2-(2-(2-甲酰基苯基)-1 H-吲哚-1-基)乙酸乙酯暴露于叔丁醇钾导致乙基吲哚[2,1 - a ]异喹啉-6-的形成。羧酸盐。
The synthesis of indolo- and pyrrolo[2,1- a ]isoquinolines
作者:Charles B. de Koning、Joseph P. Michael、Rakhi Pathak、Willem A.L. van Otterlo
DOI:10.1016/j.tetlet.2003.12.020
日期:2004.2
The synthesis of fused isoquinolines from N-benzyl protected indoles and pyrroles is described. For example, treatment of t-butyl-2-(2-formyl-3,4-dihydro-1-naphthalenyl)-3-methyl-1H-indole-1-carboxylate with KOBut in DMF provided 14-methyl-8-phenylbenzo[h]indolo[2,1-a]isoquinoline in good yield. Analogous N-benzylpyrrole precursors could similarly be cyclized to give pyrrolo[2,1-a]isoquinolines.
描述了由N-苄基保护的吲哚和吡咯合成稠合的异喹啉。例如,用DMF中的KOBu t处理叔丁基-2-(2-甲酰基-3,4-二氢-1-萘基)-3-甲基-1 H-吲哚-1-羧酸酯提供了14-甲基-8 -苯基苯并[ h ]吲哚[2,1- a ]异喹啉,收率高。类似的N-苄基吡咯前体可以类似地环化得到吡咯并[2,1- a ]异喹啉。
Palladium-Catalyzed Mono-α-arylation of Acetone with Aryl Halides and Tosylates
作者:Kevin D. Hesp、Rylan J. Lundgren、Mark Stradiotto
DOI:10.1021/ja200009c
日期:2011.4.13
selective Pd-catalyzed mono-α-arylation of acetone employing aryl chlorides, bromides, iodides, and tosylates. The use of appropriately designed P,N-ligands proved to be the key to controlling the reactivity and selectivity. The reaction affords good yields with substrates containing a range of functional groups at modest Pd loadings using Cs(2)CO(3) as the base and employing acetone as both a reagent and
The present invention provides novel compounds and ligands that are useful in transition metal catalyzed cross-coupling reactions. For example, the compounds and ligands of the present invention are useful in palladium or gold catalyzed cross-coupling reactions.