Ruthenium-Catalyzed Remote C–H Sulfonylation of <i>N</i>-Aryl-2-aminopyridines with Aromatic Sulfonyl Chlorides
作者:Balu Ramesh、Masilamani Jeganmohan
DOI:10.1021/acs.orglett.7b03051
日期:2017.11.3
A ruthenium-catalyzedremote sulfonylation at the C5 position of the pyridine group of N-aryl-2-aminopyridines with aromatic sulfonyl chlorides is described. The mechanistic and deuterium labeling studies clearly reveal that the ruthenametallacycle is a key intermediate in the reaction, which forms via the C–H bond activation. The DFT calculation supports that the C5 position of the 2-aminopyridine
A copper modified phosphorus doped g-C3N4 (Cu/P-CN) has been prepared and identified as an efficient catalyst for the synthesis of N-arylpyridin-2-amine derivatives by the reaction of 2-aminopyridine and aryl boronic acid under the irradiation of blue light.
Nanocrystalline magnesium oxide-stabilized palladium(0): an efficient and reusable catalyst for synthesis of N-(2-pyridyl)indoles
作者:Police Vishnuvardhan Reddy、Manne Annapurna、Pottabathula Srinivas、Pravin R. Likhar、Mannepalli Lakshmi Kantam
DOI:10.1039/c5nj00074b
日期:——
A selective and efficient catalytic process has been developed for the oxidative coupling between N-aryl-2-aminopyridines and alkynes using a nanocrystallinemagnesium oxide (NAP–MgO)-supported palladium nanoparticle [NAP–Mg–Pd(0)] catalyst and CuCl2 as an oxidant. The process involves the ortho C–H activation of N-aryl-2-aminopyridines to give N-pyridyl indoles in excellent yields and the true heterogeneity
A cascade C–H functionalization/cyclization reaction of N-arylpyridin-2-amines with α,β-unsaturated aldehydes for the synthesis of dihydroquinolinone derivatives under rhodium catalysis
作者:Zi-Jun Wu、Kenneth L. Huang、Zhi-Zhen Huang
DOI:10.1039/c7ob00743d
日期:——
A novel cascade C–H functionalization/cyclizationreaction of N-arylpyridin-2-amines with α,β-unsaturated aldehydes has been developed under rhodium catalysis, affording dihydroquinolinone derivatives in moderate to excellent yields. A plausible mechanism of dual catalytic cycles by rhodium(III) catalysis is also proposed.
Syntheses, structures and magnetic properties of Mn(<scp>ii</scp>) dimers [CpMn(μ-X)]<sub>2</sub>(Cp = C<sub>5</sub>H<sub>5</sub>; X = RNH, R<sup>1</sup>R<sup>2</sup>N, CCR)
作者:Carmen Soria Alvarez、Sally R. Boss、Jonathan C. Burley、Simon M. Humphry、Richard A. Layfield、Richard A. Kowenicki、Mary McPartlin、Jeremy M. Rawson、Andrew E. H. Wheatley、Paul T. Wood、Dominic S. Wright
DOI:10.1039/b409135c
日期:——
Manganocene, Cp2Mn, has been employed as a precursor in the synthesis of a range of Mn(II) dimers of the type [CpMn(μ-X)]2
[X = 8-NHC9H6N (1), N(Ph)(C5H4N)
(2), N(4-EtC6H4)(C5H4N)
(3) and CCPh (4)] as well as the bis-adduct [Cp2MnHNC(NMe2)2}2]
(5). The solid-state structures of 1â5 are reported. Variable-temperature magnetic measurements have been used to assess the extent of Mn(μ-X)Mn communication within the dimers of 1â4 as a function of the bridging ligands (X).