Rational Design of a Second Generation Catalyst for Preparation of Allylsilanes Using the Silyl-Heck Reaction
作者:Jesse R. McAtee、Glenn P. A. Yap、Donald A. Watson
DOI:10.1021/ja505446y
日期:2014.7.16
second-generation ligand, bis(3,5-di-tert-butylphenyl)(tert-butyl)phosphine, for the preparation of allylsilanes using the palladium-catalyzed silyl-Heck reaction. This new ligand provides nearly complete suppression of starting material alkene isomerization that was observed with our first-generation catalyst, providing vastly improved yields of allylsilanes from simple alkene starting materials.
使用合理的配体设计,我们开发了第二代配体,双(3,5-二叔丁基苯基)(叔丁基)膦,用于使用钯催化的甲硅烷基-Heck 反应制备烯丙基硅烷。这种新的配体几乎完全抑制了我们的第一代催化剂所观察到的原料烯烃异构化,大大提高了从简单烯烃原料中获得的烯丙基硅烷的产率。描述了量化新配体的电子和空间特性的研究。最后,我们报告了使用类似配体氧化加成 Me3SiI 产生的钯络合物的 X 射线晶体结构,该结构提供了对催化系统性质的重要洞察。
Regio- and stereoselective synthesis of allyltrimethylsilanes via krief-reich elimination in β-seleno-γ- silyl alcohols
作者:Tarun K. Sarkar、Sunil K. Ghosh、Tushar K. Satapathi
DOI:10.1016/s0040-4020(01)89757-x
日期:1990.1
Krief-Reich elimination over silicon-controlled rearrangement in β-seleno- γ -silyl alcohols, readily available from α-selenoaldehydes, 10 - 12. Usefulness of this protocol for the introduction of the allylsilane function α to the carbonyl group in cycloalkanones as well as for the preparation of unsymmetrically substituted allylsilanes is also reported.
Preparation of Allyl and Vinyl Silanes by the Palladium-Catalyzed Silylation of Terminal Olefins: A Silyl-Heck Reaction
作者:Jesse R. McAtee、Sara E. S. Martin、Derek T. Ahneman、Keywan A. Johnson、Donald A. Watson
DOI:10.1002/anie.201200060
日期:2012.4.10
high‐yielding protocol for the palladium‐catalyzed silylation of terminal alkenes is reported. This method allows facileconversion of styrenes to E‐β‐silyl styrenes by using iodotrimethylsilane (TMSI) or chlorotrimethylsilane/lithium iodide (see scheme). Terminal allyl silanes with good E/Z ratios are also readily accessed from α‐olefins.
A Pd-catalyzed oxidative silylation of simple olefins with hexamethyldisilane to give allylsilanes has been achieved usingmolecularoxygen as the sole oxidant. The reaction provides a useful protocol to access synthetically useful allylsilanes from easily accessible simple olefins and hexamethyldisilane without using any oxidants other than O2.
A Bench-Stable, Single-Component Precatalyst for Silyl–Heck Reactions
作者:Sarah B. Krause、Jesse R. McAtee、Glenn P. A. Yap、Donald A. Watson
DOI:10.1021/acs.orglett.7b02807
日期:2017.10.20
reaction aimed at identifying active palladium complexes have revealed a new species that is formed in situ. This complex has been identified as the palladium iodide dimer, [(JessePhos)PdI2]2, which has been found to be a competent single-component precatalyst for the silyl-Heck reaction. This complex is easily prepared and is temperature, moisture, and airstable. Additionally, this precatalyst provides