Copper-catalyzed synthesis of 2-aminobenzothiazoles from 2-iodophenyl isocyanides, potassium sulfide and amines
作者:Hao Min、Genhua Xiao、Wenjuan Liu、Yun Liang
DOI:10.1039/c6ob02413k
日期:——
A simple and practically useful synthetic method for the synthesis of a variety of 2-aminobenzothiazoles was developed. This methodology could construct one C–N bond and two C–S bonds in a step reaction and provide the desired products in good to perfect yields.
Dioxygen-triggered oxidative cleavage of the C–S bond towards C–N bond formation
作者:Zongchao Lv、Huamin Wang、Zhicong Quan、Yuan Gao、Aiwen Lei
DOI:10.1039/c9cc05707b
日期:——
Research on the cleavage of C–C bonds has been well developed. By comparison with this, the activation of C–S bonds remains challenging. Herein, dioxygen-triggered oxidative cleavage of C–S bonds has been achieved, delivering a series of N-containing heterocyclic compounds that are frequently found in pesticides and pharmaceuticals. Additionally, the potential utility of this protocol was further demonstrated
Copper- and palladium-catalyzed intramolecular C–S bond formation: a convenient synthesis of 2-aminobenzothiazoles
作者:Laurie L. Joyce、Ghotas Evindar、Robert A. Batey
DOI:10.1039/b311591g
日期:——
Copper- and palladium-catalyzed intramolecular CâS bond formation by cross-coupling between an aryl halide and thiourea functionality is demonstrated for the synthesis of 2-aminobenzothiazoles, wherein the Cu-catalyzed protocol is generally superior and more cost effective than the Pd-catalyzed protocol; the Cu-catalyzed reaction also further expands recent studies exploring the utility of Cu salts as replacements for Pd in carbonâheteroatom bond-forming reactions. A one-pot variant combining the synthesis of the thiourea and the cyclization was also demonstrated.
Heterocycle Formation via Palladium-Catalyzed Intramolecular Oxidative C−H Bond Functionalization: An Efficient Strategy for the Synthesis of 2-Aminobenzothiazoles
作者:Laurie L. Joyce、Robert A. Batey
DOI:10.1021/ol900958z
日期:2009.7.2
N-Arylthioureas are converted to 2-aminobenzothiazoles via intramolecular C−S bond formation/C−H functionalization utilizing an unusual cocatalytic Pd(PPh3)4/MnO2 system under an oxygen atmosphere at 80 °C. This method eliminates the need for an ortho-halo substituted precursor, instead achieving direct functionalization of the ortho-aryl C−H bond. Mechanistic observations, including a large intramolecular