convenient Pd(0)-catalyzed carboannulation with propargylic compounds for the synthesis of highlysubstituted aromatic amine derivatives in a one-pot operation was developed. In this process, a significant breakthrough in aminobenzannulation is observed. Moreover, the reaction appears to be very general and suitable for a variety of amines.
Synthesis of Benzocycloheptanones through Coupling of δ,ε-Unsaturated Chromium Carbene Complexes and 2-Alkynylbenzoyl Derivatives
作者:Rajesh Kumar Patti、Kristopher V. Waynant、James W. Herndon
DOI:10.1021/ol200825j
日期:2011.6.3
coupling of pentenylcarbene complexes and 2-alkynylbenzoyl derivatives affords naphthocycloheptanones in a single step involving simultaneous construction of both the seven-memberedring and one of the aromaticrings. Aryl tethered systems undergo intramolecular cyclopropanation.
Palladium(II)-Catalyzed Synthesis of Functionalized Indenes from <i>o</i>-Alkynylbenzylidene Ketones
作者:Feng Zhou、Xiuling Han、Xiyan Lu
DOI:10.1021/jo1023574
日期:2011.3.4
An efficient method for the synthesis of functionalized indenes from o-alkynylbenzylidene ketones under palladium(II) catalysis was developed. The reaction is initiated by trans-nucleopalladation of alkynes, followed by conjugate addition and quenched by protonolysis of the carbon palladium bond. With acetate and halide ions as nucleophiles, 3-acetoxy- and 3-halogen-substituted indenes could be obtained in high yields.