优化了光学富集的脱氢哌啶基硼酸酯与碳酸肉桂酯的钯催化交叉偶联,以最大限度地减少立体化学侵蚀。尽管两个不对称烯丙基片段的偶联可能产生四种可能的区域异构体,但使用 ( p -CF 3 C 6 H 4 ) 3 P 作为配体的最佳程序仅提供线性 2-烯丙基化 3,4-脱氢哌啶 (>98:2 rr ) 对映体特异性高达 99%。
Direct Palladium-Catalyzed Intermolecular Allylation of Highly Electron-Deficient Polyfluoroarenes
作者:Shilu Fan、Fei Chen、Xingang Zhang
DOI:10.1002/anie.201008174
日期:2011.6.20
A simple operation: The use of readily available PPh3, high reaction efficiency, and good stereo‐ and regioselectivity provided useful and operationally simple access to polyfluoroarylated derivatives through the title transformation (see scheme; phen=1,10‐phenanthroline). The reaction mechanism was also studied.
chemo‐selective Rh(II)/Pd(0) dual catalysis that promotes one‐pot synthesis of C3‐quaternary allylic oxindoles from N‐aryl‐α‐diazo‐β‐ketoamides and functionalized allyl carbonates in good to excellent yields has been developed. The efficiency of this transformation relies on the choice of Rh(II)/Pd(0) dual catalysis strategy that enabled cascade intramolecular aryl C−H insertion and allylic alkylation
Synthesis of β<sup>3</sup>-Amino Esters by Iridium-Catalyzed Asymmetric Allylic Alkylation Reaction
作者:Chao-Guo Cao、Bin He、Zhengyan Fu、Dawen Niu
DOI:10.1021/acs.oprd.9b00280
日期:2019.8.16
A method to prepare chiral β3-amino esters from methyl 3-aminopropanoate was described. This method capitalized on a sequence involving an Ir-catalyzed asymmetric allylation of 2-azaallyl anions and a 2-aza-Cope rearrangement. β3-Amino esters containing a versatile alkene group were prepared.