Room-Temperature Palladium-Catalyzed CH Activation:<i>ortho</i>-Carbonylation of Aniline Derivatives
作者:Chris E. Houlden、Marc Hutchby、Chris D. Bailey、J. Gair Ford、Simon N. G. Tyler、Michel R. Gagné、Guy C. Lloyd-Jones、Kevin I. Booker-Milburn
DOI:10.1002/anie.200805842
日期:2009.2.23
Pd and CO—ureally got me! The title reaction proceeds efficiently at 18 °C under CO (1 atm) with 5 % [Pd(OTs)2(MeCN)2] as precatalyst. Depending on the solvents used, either anthranilates or cyclic imides can be obtained in high yields (see picture, BQ=benzoquinone, Ts=4‐toluenesulfonyl).
Pd 和 CO - 真的抓住了我!标题反应在 18 °C 下在 CO (1 atm) 下有效进行,使用 5% [Pd(OTs) 2 (MeCN) 2 ] 作为预催化剂。根据所使用的溶剂,可以高产率获得邻氨基苯甲酸酯或环状酰亚胺(见图,BQ=苯醌,Ts=4-甲苯磺酰基)。
Nickel-catalyzed Cycloadditions of Benzoxazinones with Alkynes: Synthesis of Quinolines and Quinolones
A nickel-catalyzed cycloaddition has been developed where readily available benzoxazinones react with alkynes to afford substituted quinolines or quinolones. The specific cycloaddition can be achie...
Direct Access to 2‐Aminobenzoxazinones via Ph
<sub>3</sub>
P‐I
<sub>2</sub>
Mediated Deoxygenative Amination of Isatoic Anhydrides with Tertiary Amines
Under ultrasonic irradiation, tertiary amines react rapidly with Ph3P-I2-activated isatoic anhydrides to afford 2-amino-substituted benzoxazinones regioselectively without competing C-4 substitution. Spectroscopic evidence suggests that the reaction proceeds through C2 activation of isatoic anhydrides, followed by amine substitution-N-dealkylation sequence.