Rhodium(III)-Catalyzed Oxidative Cross-Coupling of Unreactive C(sp<sup>3</sup>)–H Bonds with C(sp<sup>2</sup>)–H Bonds
作者:Guangying Tan、Jingsong You
DOI:10.1021/acs.orglett.7b02167
日期:2017.9.15
The development of the oxidative cross-coupling of unreactive C(sp3)–Hbonds with (hetero)arene C(sp2)–Hbonds is considerably appealing, yet conceptually and practically challenging. Here, we disclose the rhodium-catalyzed oxidative heteroarylation of unactivated C(sp3)–Hbonds with heteroarene C(sp2)–Hbonds. This method provides a step-economic route to β-heteroarylated 2-ethylpyridine derivatives
Rhodium(III)-Catalyzed Activation of C sp 3H Bonds and Subsequent Intermolecular Amidation at Room Temperature
作者:Xiaolei Huang、Yan Wang、Jingbo Lan、Jingsong You
DOI:10.1002/anie.201504507
日期:2015.8.3
Disclosed herein is a RhIII‐catalyzed chelation‐assisted activation of unreactive CH bonds, thus enabling an intermolecular amidation to provide a practical and step‐economic route to 2‐(pyridin‐2‐yl)ethanamine derivatives. Substrates with other N‐donor groups are also compatible with the amidation. This protocol proceeds at roomtemperature, has a relatively broad functional‐group tolerance and high
作者:Jas S. Ward、Rosa M. Gomila、Antonio Frontera、Kari Rissanen
DOI:10.1039/d2ra01390h
日期:——
The silver(I) and iodine(I) complexes of the 2-substituted pyridines 2-(diphenylmethyl)pyridine (1) and 2-(1,1-diphenylethyl)pyridine (2), along with their potential protonated side products, were synthesised to investigate the steric limitations of iodine(I) complex formation. The complexes were characterised by 1H and 1H–15N HMBC NMR, X-ray crystallography, and DFT calculations. The solid-state structures
2-取代吡啶 2-(二苯甲基)吡啶 ( 1 ) 和 2-(1,1-二苯乙基)吡啶 ( 2 )的银 ( I ) 和碘( I ) 配合物及其潜在的质子化副产物是合成以研究碘(I)络合物形成的空间限制。通过1 H 和1 H– 15 N HMBC NMR、X 射线晶体学和 DFT 计算对配合物进行了表征。银( I)和碘(I )的固态结构) 配合物与文献进行了广泛的比较,并通过 DFT 进行分析,以检查空间庞大的吡啶及其阴离子的影响。
Reactive Dications: The Superacid-Catalyzed Reactions of Alkynes Bearing Adjacent <i>N</i>-Heterocycles or Amine Groups
作者:Douglas A. Klumpp、Rendy、Yun Zhang、Aaron McElrea、Alma Gomez、Han Dang
DOI:10.1021/jo040218u
日期:2004.11.1
A variety of aminoalkynes and related heterocycles are reacted in the Bronsted superacid CF3SO3H (triflic acid), and products are obtained in generally good yields (69-99%) from Friedel-Crafts-type reactions. The reactions are consistent with the formation of novel dicationic intermediates having a vinyl cationic site and an adjacent protonated N-heterocycle or ammonium cation.
Rearrangemnets of organometallic compounds. 23. Carbon-skeletal [1,2] anionic and radical sigmatropic rearrangements: group migratory aptitudes as a probe of charge type in the 1,2-shifts of .beta.-phenyl-.beta.-(2-pyridyl)- and .beta.-phenyl-.beta.-(4-pyridyl)ethyl systems
作者:John J. Eisch、Csaba A. Kovacs、Prabodh Chobe、Marek P. Boleslawski