Practical Synthesis of Allylic Silanes from Allylic Esters and Carbamates by Stereoselective Copper-Catalyzed Allylic Substitution Reactions
作者:Martin Oestreich、Gertrud Auer
DOI:10.1002/adsc.200404381
日期:2005.4
The first copper-catalyzedallylic substitution reactions of allylic acetates and carbamates employing a bis(triorganosilyl)zinc reagent are reported. This novel procedure avoids the use of stoichiometric amounts of copper salts which are usually mandatory with this chemistry. Application of this methodology to standard model substrates substantiates a high diastereoselectivity for the double bond
Expedient access to branched allylic silanes by copper-catalysed allylic substitution of linear allylic halides
作者:Devendra J. Vyas、Martin Oestreich
DOI:10.1039/b920793g
日期:——
An unprecedented copper-catalysed allylic transposition enables the regioselectivesynthesis of branched allylic silanes from linear allylichalides through direct C-Si bond formation.
Silicon Grignard Reagents as Nucleophiles in Transition-Metal-Catalyzed Allylic Substitution
作者:Weichao Xue、Martin Oestreich
DOI:10.1055/s-0037-1610309
日期:2019.1
shown to promote allylic substitution reactions of allylic electrophiles with silicon Grignard reagents. The procedure was further elaborated for CuI as catalyst. The regioselectively is independent of the leaving group for primary allylic precursors, favoring α over γ. The stereochemical course of this allylictransposition was probed with a cyclic system, and anti-diastereoselectivity was obtained.
Copper-Catalyzed SiB Bond Activation in Branched-Selective Allylic Substitution of Linear Allylic Chlorides
作者:Devendra J. Vyas、Martin Oestreich
DOI:10.1002/anie.201004658
日期:2010.11.2
The harder they come, the better they leave! Chloride is superior to all common leaving groups in the γ‐selective allylicsubstitution of linear precursors. This approach involves a novel copper‐catalyzed SiBbondactivation (see scheme; γ/α≥98:2, 7 examples; Si=SiMe2Ph and B=Bpin with pin=pinacolato).
他们来得越难,就越会离开!在线性前体的γ-选择性烯丙基取代中,氯化物优于所有常见的离去基团。这种方法涉及一种新型的铜催化的Si 乙键活化(参见方案;γ/α≥98:2,7例子;硅=森达2 P h和乙= BPIN与销=频哪醇)。
Regio- and diastereoselective Pd-catalyzed aminochlorocyclization of allylic carbamates: scope, derivatization, and mechanism
作者:Bruna Papa Spadafora、Francisco Wanderson Moreira Ribeiro、Jullyane Emi Matsushima、Elaine Miho Ariga、Isaac Omari、Priscila Machado Arruda Soares、Diogo de Oliveira-Silva、Elisângela Vinhato、J. Scott McIndoe、Thiago Carita Correra、Alessandro Rodrigues
DOI:10.1039/d1ob00670c
日期:——
diastereoselective synthesis of oxazolidinones via a Pd-catalyzed vicinal C–N/C–Cl bond-forming reaction from internal alkenes of allylic carbamates is reported. The oxazolidinones are obtained in yields of 44 to 95% with high to excellent diastereoselectivities (from 6 : 1 to >20 : 1 dr) from readily available precursors. This process is scalable, and the products are suitable for the synthesis of useful amino