“One-Pot” Two-Step Synthesis of Aryl Sulfur Compounds by Photoinduced Reactions of Thiourea Anion with Aryl Halides
作者:Juan E. Argüello、Luciana C. Schmidt、Alicia B. Peñéñory
DOI:10.1021/ol035545n
日期:2003.10.1
aryl halides with the thiourea anion afford arene thiolate ions in DMSO. These species without isolation, and by a subsequent aliphatic nucleophilic substitution, S(RN)1 reaction, oxidation, or protonation, yield aryl methyl sulfides, diaryl sulfides, diaryl disulfides, and aryl thiols with good yields (50-80%). This is a simple and convenient approach which involves the use of the commercially available
Photoinduced Nucleophilic Substitution of Aryl Halides with Potassium Thioacetate – A One-Pot Approach to Aryl Methyl and Diaryl Sulfides
作者:Luciana C. Schmidt、Valentina Rey、Alicia B. Peñéñory
DOI:10.1002/ejoc.200500955
日期:2006.5
Aryl methyl sulfides and diaryl sulfides were prepared by photoinduced reactions of potassium thioacetate with arylhalides under entrainment conditions. Without isolation, the arene thiolates obtained by the aromatic substitution were quenched with methyl iodide to afford the aryl methyl sulfides in 26–59 % yields in a “one-pot” procedure together with the diaryl sulfides in variable yields (3–31 %)
for synthesizing symmetrical sulfides using iodoarenes and potassium metabisulfite (K2S2O5). While K2S2O5 is known as a convenient sulfur dioxide surrogate, here it acts as a divalent sulfur source, pioneering its potential utility. The reaction exhibits wide substrate generality in which even highly bulky substrates can be applied to afford sterically congested sulfides.
在此,我们提出了一种使用碘芳烃和焦亚硫酸钾 (K 2 S 2 O 5 ) 合成对称硫化物的安全实用方法。虽然 K 2 S 2 O 5被称为方便的二氧化硫替代品,但它在这里充当二价硫源,开创了其潜在用途。该反应表现出广泛的底物普遍性,其中甚至可以应用非常庞大的底物来提供空间拥挤的硫化物。
HELLWINKEL D.; BOHNET S., CHEM. BER., 120,(1987) N 7, 1151-1173