Detection and identification of short-lived free radicals by electron spin resonance trapping techniques (spin trapping). Photolysis of organolead, -tin, and -mercury compounds
Treatment of diphenyltin, (Ph2Sn)m, with alkyl halide, RX, afforded Ph2RSnX, Ph3SnX, PhRSnX2, PhR2SnX and Ph2SnX2. The mode of formation of these compounds was studied.
Tin for Organic Synthesis, 14. Synthesis of Aromatic and α,β‐Unsaturated Aldehydes by a Friedel‐Crafts‐like Electrophilic Destannylation Using 1,1‐Dichloromethyl Methyl Ether
作者:Michael Niestroj、Wilhelm P. Neumann†
DOI:10.1002/cber.19961290111
日期:1996.1
for the preparation of a variety of aromatic (7a–m), heteroaromatic (7n–r), and α,β-unsaturated aldehydes (8a–f) is described. The reaction of trialkylaryl- (2a–o), heteroaryl- (2p–t), and 1-alkenylstannanes (4a–f and 5a–f) with dichloromethylmethylether (1, DCME) in the presence of aluminium trichloride followed by hydrolysis provides the corresponding aldehydes. In the case of arylstannanes the ipso-isomers
Indium-mediated regioselective synthesis of ketones from arylstannanes under solvent-free ultrasound irradiation
作者:Marcos J. Lo Fiego、Mercedes A. Badajoz、Claudia Domini、Alicia B. Chopa、María T. Lockhart
DOI:10.1016/j.ultsonch.2012.10.018
日期:2013.5
drastically reduced (from 3-32h to 10-70min) under ultrasonic irradiation. Evidences for the involvement of a homolyticaromaticipso-substitution mechanism, in which indium metal acts as radical initiator, are presented. It is possible the transference of two aryl groups from tin, thus improving effective mass yield, working with diarylstannanes as starting substrates.
A Convenient Quick Synthesis of SnBu<sub>2</sub>RCl Derivatives
作者:Nora Carrera、Mónica H. Pérez-Temprano、Ana C. Albéniz、Juan A. Casares、Pablo Espinet
DOI:10.1021/om900326g
日期:2009.7.13
the quick preparation of SnBu2RX (Bu = n-Bu) has been developed using microwave irradiation and column chromatography in acidic alumina. The method can be a good alternative particularly for easy and quick preparation of small amounts for test purposes and, in general, for the synthesis of compounds that cannot be purified by fractional distillation due to thermal lability or low volatility.
已经开发了一种使用微波辐射和酸性氧化铝柱色谱法快速制备SnBu 2 RX(Bu = n -Bu)的简便方法。该方法可以是一种很好的选择,特别是对于出于测试目的的简便快速制备,以及通常用于合成由于热不稳定性或低挥发性而无法通过分馏纯化的化合物的合成而言。
Stille Cross-Coupling Reactions with Tin Reagents Supported on Ionic Liquids
ionic-liquid-supported tin reagents were synthesized and used in Stillecross-couplingreactions. High yields of biaryls were obtained under low-temperature, solvent-free, ligand-free conditions, with simple purification techniques. Moreover, the tin compound could be recycled up to five times without significant loss of reactivity. An expanded catalytic cycle for the Stille cross coupling reaction is proposed in