Aromatic radical anions as possible intermediates in the nucleophilic aromatic substitution (SNAr): an EPR study
作者:Loris Grossi、Samantha Strazzari
DOI:10.1039/a903407b
日期:——
The reactions among halonitrobenzenes or polynitrobenzenes and alkoxides, thiolates or tertiary amines have provided the evidence that in a SNAr reaction type a single electron transfer from the nucleophile to the aromatic substrate, to generate two radical species within the solvent cage, can take place to some extent. The detection of radical intermediates by EPR spectroscopy, in several SNAr reactions
卤代硝基苯或多硝基苯与醇盐,硫醇盐或叔胺之间的反应提供了证据,表明在S N Ar反应类型中,可以发生从亲核体到芳族底物的单电子转移,从而在溶剂笼内产生两个自由基在某种程度上。通过EPR光谱学,在几μs自由基中间体的检测Ñ氩反应报道。
Base-Catalyzed Transesterification of Thionoesters
作者:Josiah J. Newton、Robert Britton、Chadron M. Friesen
DOI:10.1021/acs.joc.8b02260
日期:2018.10.19
Here we report a convenient synthesis of thionoesters by base-catalyzed transesterification. Benzyl and alkyl thionobenzoates and thionoheterobenzoates were efficiently prepared using various alcohols catalyzed by the corresponding sodium alkoxide. This methodology features a broad substrate scope, good to excellent yields, short reaction times, while simultaneously driving the reaction toward completion
Synthesis and crystal structure of {(C8H8)Dy[μ-OCH2(CH2)2CHCH2(THF)}2
作者:Suobo Zhang、Gecheng Wei、Wenqi Chen、Juzheng Liu
DOI:10.1016/0277-5387(94)80016-2
日期:1994.6
(C8H8)Dy[mu-OCH2(CH2)2CH=CH2](THF)}2 was prepared by the reaction of (C8H8)DyCl(THF)n with CH2=CH(CH2)2CH2ONa in THF and characterized by spectroscopic, analytical and crystallographic methods. Its crystal structure shows that the complex is a dimer with a Dy3+ coordinated to one C8H8 ligand, one THF and two bridging OCH2(CH2)2CH=CH2 groups. The average Dy-C(C8H8 ring) distance is 2.593(6) angstrom. The Dy-O(THF) and average Dy-O(OR) distances are 2.431(4) and 2.260(8) angstrom, respectively.
Broggini, Gianluigi; Garanti, Luisa; Molteni, Giorgio, Journal of Chemical Research, Miniprint, 1995, # 10, p. 2389 - 2397