Iron-Catalyzed Oxidative C−C and N−N Coupling of Diarylamines and Synthesis of Spiroacridines
作者:Raphael F. Fritsche、Gabriele Theumer、Olga Kataeva、Hans-Joachim Knölker
DOI:10.1002/anie.201610168
日期:2017.1.9
We describe iron‐catalyzed intermolecular oxidative coupling reactions of diarylamines to form substituted 2,2′‐bis(arylamino)biaryl compounds, tetraarylhydrazines, and 5,6‐dihydrobenzo[c]cinnolines with the same hexadecafluorinated iron–phthalocyanine catalyst. The mild formation of C−C or N−N bonds was controlled by the use of acidic or basic additives. In contrast to most iron‐catalyzed dehydrogenative
我们描述了铁催化的二芳基胺的分子间氧化偶联反应,用相同的十六氟化铁-酞菁催化剂形成取代的2,2'-双(芳基氨基)联芳基化合物,四芳基肼和5,6-二氢苯并[ c ]肉桂啉。通过使用酸性或碱性添加剂,可控制CC或N-N键的温和形成。与大多数铁催化的脱氢偶联反应相反,环境空气可以用作唯一的氧化剂。此外,六水合氯化铁(III)促进了单锅偶合,随后促进了分子内脱芳香性偶合,从而生成10 H-螺[[啶-9,1'-环己2',5'-dien-4'-one]。
Asymmetric Catalysis Using Aromatic Aldehydes as Chiral α-Alkoxyalkyl Anions
an aromaticaldehyde for use in asymmetric synthesis. The reaction between aromaticaldehydes and aryl or allyl electrophiles with a silylboronate utilizing a chiral copper-N-heterocyclic carbene catalyst and a palladium-bisphosphine catalyst in a synergistic manner occurred with high enantioselectivities to deliver the three-component coupling products, chiral silyl-protected secondary alcohol derivatives
Pd(II)-Catalyzed C−H Activation/Aryl−Aryl Coupling of Phenol Esters
作者:Bin Xiao、Yao Fu、Jun Xu、Tian-Jun Gong、Jian-Jun Dai、Jun Yi、Lei Liu
DOI:10.1021/ja909818n
日期:2010.1.20
reactions have been well-known, Pd(II) insertion into C-H bonds promoted by coordination of an oxygen-only group to the palladium remains rather rare. In the present study, the first cyclopalladation complex formed from a simple phenol ester was characterized by X-ray crystallography. A promising protocol for the ortho C-H activation/aryl-aryl coupling of phenol esters that was not sensitive to moisture
尽管含氮基团导向的环钯化反应已广为人知,但通过仅含氧的基团与钯的配位促进 Pd(II) 插入 CH 键的情况仍然相当罕见。在本研究中,第一个由简单苯酚酯形成的环钯化配合物通过 X 射线晶体学表征。然后建立了对水分或空气不敏感的苯酚酯邻位 CH 活化/芳基-芳基偶联的有前途的方案。该反应的效用已被证明可用于合成有用的苯酚衍生物。
Processes and synthetic intermediates for preparing N-arylacridancarboxylic acid derivatives
申请人:——
公开号:US20010031869A1
公开(公告)日:2001-10-18
Synthetic processes and intermediates are disclosed for the preparation of N-arylacridancarboxylic acid derivatives. The derivatives are esters, thioesters, amides and sulfonimides. A key feature of the processes is the preparation of N-aryl substituted intermendiates by formation of a bond between the nitrogen atom of the acridan ring and a carbon atom of another aromatic or heteroaromatic ring compound. The arylation reaction is catalyzed by a palladium catalyst. The N-arylacridancarboxylic acid derivatives are useful in methods for producing light and in assays for peroxidase enzymes and enzyme inhibitors and in assays employing enzyme-labeled specific binding pairs.