Synthesis of Biaryls Using the Coupling Reaction of Diaryldimethyltins with Copper(II) Nitrate
作者:Genta Harada、Masato Yoshida、Masahiko Iyoda
DOI:10.1246/cl.2000.160
日期:2000.2
Cu(NO3)2·3H2O in THF proceeds smoothly at room temperature under ambient atmosphere to produce the corresponding biaryls in good to high yields. Diaryldimethyltins can be prepared in high yields by the reaction of aryllithiums with dichlorodimethyltin.
Mechanism and Unusual Fragmentation Selectivities of Aryltrialkylstannane Cation Radicals
作者:Pu Luo、Joseph P. Dinnocenzo
DOI:10.1021/acs.joc.5b01690
日期:2015.9.18
Aryltrialkylstannane cation radicals were generated and characterized by nanosecond transient absorption spectroscopy. Kinetics show the fragmentations of the stannane cation radicals occur by a bimolecular, nucleophile-assisted mechanism (SN2). Consistent with this hypothesis, stericeffects on both the nucleophile and the stannane cation radicals were observed. Steady-state, preparative photooxidation
产生了芳基三烷基锡烷阳离子自由基,并通过纳秒瞬态吸收光谱对其进行了表征。动力学表明,锡烷阳离子自由基的断裂是通过双分子亲核试剂辅助机制(S N 2)发生的。与该假设一致,观察到了对亲核试剂和锡烷阳离子自由基的空间位阻。稳态的制备性光氧化实验表明,芳基三甲基锡烷阳离子自由基对芳基自由基的损失优于甲基自由基,并且芳基对甲基自由基损失的选择性取决于亲核试剂的身份。通过基于Bent规则的假设合理化了对芳基自由基损失的偏爱。
Synthesis of Functionalized Diaryldimethylstannanes from the Me<sub>2</sub>Sn<sup>2-</sup> Dianion by S<sub>RN</sub>1 Reactions
作者:Paula M. Uberman、Sandra E. Martín、Roberto A. Rossi
DOI:10.1021/jo0514422
日期:2005.10.1
The reaction of different ArCl with the Me2Sn2- dianion in liquid ammonia under irradiation afforded Ar2SnMe2 in good yields (68−85%). The results obtained clearly indicate that the reaction proceeded through an SRN1 reaction. As a synthetic application of these Ar2SnMe2, the homocoupling is described in the presence of Cu(NO3)2·2.5H2O to afford the biaryls. These reactions proceeded almost quantitatively
On the reaction of 4-substituted trimethyltin aromatics with perchlorylfluoride
作者:Achim Hiller、Jörg T. Patt、Jörg Steinbach
DOI:10.1016/j.jorganchem.2006.04.023
日期:2006.9
To evaluate the suitability of [F-18]perchorylfluoride [F-18]FClO3 as an electrophilic fluorination agent for the preparation of radio-pharmaceuticals, the reactivity non-radioactive FClO3 towards 4-substituted trimethyltin aromatic compounds was studied. Contrary to the expectation, an electrophilic fluorination of the aromatic nucleus did not occur. The reaction of perchlorylfluoride with aromatic trimethylstannyl compounds resulted in the formation of trimethyltin fluoride and the respective destannylated aromatics in variable yields. (c) 2006 Elsevier B.V. All rights reserved.