Rh(III)- and Zn(II)-Catalyzed Synthesis of Quinazoline <i>N</i>-Oxides via C–H Amidation–Cyclization of Oximes
作者:Qiang Wang、Fen Wang、Xifa Yang、Xukai Zhou、Xingwei Li
DOI:10.1021/acs.orglett.6b03155
日期:2016.12.2
Quinazoline N-oxides have been prepared from simple ketoximes and 1,4,2-dioxazol-5-ones via Rh(III)-catalyzed C–H activation–amidation of the ketoximes and subsequent Zn(II)-catalyzed cyclization. The substrate scope and functional group compatibility were examined. The reaction features relay catalysis by Rh(III) and Zn(II).
One-step method for synthesis of 2,4-disubstituted quinazoline 3-oxides by reaction of a 2-aminoaryl ketone with a hydroxamic acid using Zn(OTf)2 as the catalyst
A simple and efficient method for the preparation of 2,4-disubstituted quinazoline3-oxides by reaction of a hydroxamic acid with 2-aminoaryl ketones using zinc(II) triflate as the catalyst is described.