Palladium-catalyzed cross-couplings of allylic phosphates
摘要:
A range of palladium-catalyzed cross-coupling reactions can be performed using allylic phosphates as electrophiles. Both conventional heating and microwave irradiation can be used. (C) 2009 Elsevier Ltd. All rights reserved.
Free Radical-Mediated Tandem Reaction of Dehydroamino Acid Derivative with π-Allyl Palladium Complex: Synthesis of α,α-Disubstituted Amino Acids
作者:Yoshiji Takemoto、Hideto Miyabe、Ryuta Asada、Kazumasa Yoshida
DOI:10.1055/s-2004-815407
日期:——
The diethylzinc-promoted reaction of dehydroamino acid derivative with electrophilic π-allylpalladium complex proceeded smoothly to afford α,α-disubstituted amino acids via a tandem radical and anionic carbon-carbon bondforming processes.
Synthesis of α,α-disubstituted amino acids based on tandem reaction of dehydroamino acid derivatives
作者:Hideto Miyabe、Ryuta Asada、Yoshiji Takemoto
DOI:10.1016/j.tet.2004.10.104
日期:2005.1
all-substituted sp3-hybridized carbon-center was investigated via tandem reaction of dehydroamino acid derivatives. The diethylzinc-promoted reaction of dehydroamino acid derivatives with acid anhydride or π-allylpalladium complex proceeded smoothly to afford α,α-disubstituted amino acids via a radical and anionic carbon–carbon bond-forming processes. The tandem reductive reaction of N-phthaloyl dehydroalanine
Nickel-Catalyzed C–H Coupling with Allyl Phosphates: A Site-Selective Synthetic Route to Linear Allylarenes
作者:Xuefeng Cong、Yuexuan Li、Yu Wei、Xiaoming Zeng
DOI:10.1021/ol501707z
日期:2014.8.1
reported that a nickel/phosphine catalyst allows the C–H allylation to occur effectively with the allyl site selectivity predominantly governed by steric effects. This reaction provides a facile and predictable route for the selective preparation of linear allylarenes from readily available benzamides and allyl phosphates.
Rapid and concise: The title reaction proceeds via copper complexes in a highly stereospecific manner (see scheme; acac=acetylacetonate, phen=1,10‐phenanthroline, TBS=tBuMe2Si). The catalysis provides a rapid and concise route to allylarenes that contain fluorinated aromatic cores of an electron‐deficient nature.
快速简明:标题反应以高度立体定向的方式通过铜络合物进行(参见方案; acac =乙酰丙酮酸酯,phen = 1,10-菲咯啉,TBS = t BuMe 2 Si)。催化作用提供了一条快速而简明的途径,以得到含有电子不足性质的氟化芳族核的烯丙基芳烃。
ProPhenol Derived Ligands to Simultaneously Coordinate a Main‐Group Metal and a Transition Metal: Application to a Zn−Cu Catalyzed Reaction
作者:Barry M. Trost、Guoting Zhang、Minghao Xu、Xiaotian Qi
DOI:10.1002/chem.202104268
日期:2022.2.16
A new bi-functional ligandbearingchiralN-heterocycliccarbene (NHC) and prolinol moieties is designed and applied in the generation of a Cu/Zn hetero-bimetallic complex, which unlocks the asymmetric allylic alkylation reactions of allyl phosphates with zinc keto-homoenolates generated from cyclopropanols, leading to the formation of various γ-vinyl ketones with good regio- and enantio-selectivity
设计了一种新的带有手性 N-杂环卡宾(NHC) 和脯氨醇部分的双功能配体,并应用于生成 Cu/Zn 杂双金属配合物,从而解锁了磷酸烯丙酯与酮基高烯醇锌的不对称烯丙基烷基化反应由环丙醇生成,导致形成具有良好区域选择性和对映选择性的各种 γ-乙烯基酮。DFT 计算支持烯丙基磷酸酯与催化剂的螯合促进了 S N 2' 的添加,并且配体-底物空间相互作用解释了立体选择性结果。