Microwave-assisted facile synthesis of 2-substituted 2-imidazolines
作者:Mohsin Y. Pathan、Vijaykumar V. Paike、Pandurang R. Pachmase、Sandeep P. More、Suresh S. Ardhapure、Rajendra P. Pawar
DOI:10.3998/ark.5550190.0007.f25
日期:——
A novel method for the synthesis of 2-substituted2-imidazolines under microwave irradiation is reported. The yields of product obtained using this protocol are significantly high and the reaction time is reduced.
A Convenient Synthesis of Oxazolines and Imidazolines from Aromatic Aldehydes with Pyridinium Hydrobromide Perbromide in Water
作者:Shinsei Sayama
DOI:10.1055/s-2006-941597
日期:2006.6
Various 2-oxazolines were prepared from aromatic aldehydes and 2-aminoethanol with pyridinium hydrobromide perbromide in water at room temperature. 2-Imidazolines were also obtained in good yields from aromatic aldehydes and ethylenediamine under the same reaction conditions.
Ligandless Nickel-Catalyzed <i>Ortho</i>-Selective Directed Trifluoromethylthiolation of Aryl Chlorides and Bromides Using AgSCF<sub>3</sub>
作者:Tin Nguyen、Weiling Chiu、Xinying Wang、Madeleine O. Sattler、Jennifer A. Love
DOI:10.1021/acs.orglett.6b02689
日期:2016.11.4
A mild protocol for Ni-catalyzed trifluoromethylthiolation of aryl chlorides and bromides is described herein. The method utilizes AgSCF3 as an easily accessible nucleophilic trifluoromethylthiolating reagent and does not require any ligands or additives. Ortho-selectivity is achieved using a variety of directing groups such as imines, pyridines, and oxazolines for 24 examples in up to 95% yield.
An Efficient Preparation of 2-Imidazolines and Imidazoles from Aldehydes with Molecular Iodine and (Diacetoxyiodo)benzene
作者:Hideo Togo、Midori Ishihara
DOI:10.1055/s-2005-923604
日期:——
2-Imidazolines were easily prepared in quite good yields from the reaction of aldehydes and ethylenediamine with molecular iodine in the presence of potassium carbonate. Moreover, 2-imidazolines obtained were smoothly oxidized to the corresponding imidazoles in good yields using (diacetoxyiodo)benzene at room temperature.
Facile Preparation of 2-Imidazolines from Aldehydes with <i>tert</i>-Butyl Hypochlorite
作者:Hideo Togo、Midori Ishihara
DOI:10.1055/s-2007-983726
日期:2007.7
An efficient and high-yield preparation of 2-imidazolines was achieved from aldehydes and ethylenediamines in the presence of tert-butyl hypochlorite. By this method, 1,3-bis(imidazolin-2-yl)benzene and 2,6-bis(imidazolin-2-yl)pyridine, which act as chiral ligands, could be prepared directly from the corresponding dialdehydes in high yields.