The visible-light-driven preparation of (hetero)aryl stannanes was carried out under both photocatalyst- and metal-free conditions via irradiation of arylazo sulfones in the presence of hexaalkyldistannanes. The reaction shows a high efficiency and a wide substrates scope. The resulting crude organotin derivatives can be directly employed in a Stille protocol.
Reductive Electrophotocatalysis: Merging Electricity and Light To Achieve Extreme Reduction Potentials
作者:Hyunwoo Kim、Hyungjun Kim、Tristan H. Lambert、Song Lin
DOI:10.1021/jacs.9b10678
日期:2020.2.5
strategy that harnesses the power of light and electricity to generate an excited radical anion with a reducing potential of -3.2 V vs SCE, which can be used to activate substrates with very high reductionpotentials (Ered ≈ -1.9 to -2.9 V). The resultant aryl radicals can be engaged in various synthetically useful transformations to furnish arylboronate, arylstannane, and biaryl products.
我们描述了一种新的电光催化策略,该策略利用光和电的力量产生还原电位为 -3.2 V vs SCE 的激发自由基阴离子,可用于激活具有非常高还原电位(Ered ≈ -1.9 至 - 2.9 伏)。所得芳基可参与各种合成有用的转化,以提供芳基硼酸酯、芳基锡烷和联芳基产物。
Synthesis of Aryl Trimethylstannane via BF<sub>3</sub>·OEt<sub>2</sub>-Mediated Cross-Coupling of Hexaalkyl Distannane Reagent with Aryl Triazene at Room Temperature
BF3·OEt2-mediated cross-coupling of (SnMe3)2 with aryl triazene offers a new strategy for the synthesis of aryl stannane. A variety of synthetically useful aryl trimethylstannanes were produced in moderate to good yields with this metal-free approach. One-pot sequential Stille cross-coupling with different aryl bromides provides a short entry to both symmetrical and unsymmetrical biaryl compounds.
A New Series of PDGF Receptor Tyrosine Kinase Inhibitors: 3-Substituted Quinoline Derivatives
作者:Martin P. Maguire、Kimberly R. Sheets、Karen McVety、Alfred P. Spada、Asher Zilberstein
DOI:10.1021/jm00040a003
日期:1994.7
(PDGF-RTK) activity. The compounds were generally prepared either by a Friedlander condensation between an aryl-acetaldehyde and an o-aminobenzaldehyde or by a palladium-catalyzedcoupling between an aryl bromide or triflate and an organostannane or organozinc chloride. The presence of 6,7-dimethoxy groups on the quinoline ring was found to be advantageous although not essential for potent inhibition
Synthesis of Aryl Trimethylstannanes from Aryl Amines: A Sandmeyer-Type Stannylation Reaction
作者:Di Qiu、He Meng、Liang Jin、Shuai Wang、Shengbo Tang、Xi Wang、Fanyang Mo、Yan Zhang、Jianbo Wang
DOI:10.1002/anie.201304579
日期:2013.10.25
Sandmeyer‐type stannylation: Stille coupling is one of the most powerful coupling reactions for CC bond formation, whereas there are only limited methods to access aryl stannane compounds. A mild stannylation process based on a Sandmeyer‐type transformation using aromatic amines as the starting materials is described. DCE: 1,2‐dichloroethane.