Activation and facile dealkylation of monooxides of 2,2′-bis(alkylthio)biphenyl with triflic anhydride via dithiadications: A new method for preparation of thiasulfonium salts
Monooxides of 2,2′-bis(alkylthio)biphenyl undergo facile monodealkylation on treatment with triflicanhydride to afford the corresponding thiasulfoniumsalts except bis(methylthio) derivative. The reaction proceeds via an initial formation of the corresponding dithiadications.
Bis (alkyl)thioethers on a biphenyl scaffold: A spectroscopic and structural insight
作者:Rhiann Ferguson、Phillip S. Nejman、Alexandra M.Z. Slawin、J. Derek Woollins
DOI:10.1016/j.molstruc.2017.04.108
日期:2017.9
utilising biphenyl as the backbone of the type 2,2′-bis(alkylthio)-1,1′-biphenyl have been prepared with yields of 32–70%. The six benzyl derivatives all displayed an AB quartet for the CH2 hydrogens within their 1H NMRspectra due to restricted rotation within the molecule. Where the alkyl group was changed to neopentyl the CH2 protons became equivalent giving rise to a singlet within the 1H NMR spectrum
摘要 以联苯为骨架的2,2'-双(烷硫基)-1,1'-联苯制备了一系列双(烷基)硫醚化合物,产率为32%~70%。由于分子内的旋转受限,六种苄基衍生物在其 1H NMR 光谱中都显示出 CH2 氢的 AB 四重峰。当烷基变为新戊基时,CH 2 质子变得等效,从而在 1 H NMR 谱中产生单峰。主要使用多核 NMR 光谱和单晶 X 射线衍射对化合物进行表征。
Synthesis of novel macrocyclic compounds containing sulphur or oxygen in the ring: thia- and oxa-cyclophanes. Mass spectral and other studies
作者:David W. Allen、Peter N. Braunton、Ian T. Millar、John C. Tebby
DOI:10.1039/j39710003454
日期:——
The synthesis of a number of large-ring heterocyclic compoundscontaining two or four sulphur atoms in the ring is described. The compounds include 2,2′-bridged biphenyls having 7–11 -membered heterocyclic rings; and 7-, 8-, 9-, 14-, 16-, 18-, and 24-membered heterocyclic systems containing o-xylylene bridges. Oxygen analogues of the former series are also described. The 1H n.m.r. and mass spectra
描述了环中包含两个或四个硫原子的许多大环杂环化合物的合成。这些化合物包括具有7-11元杂环的2,2'-桥联苯;以及含有邻亚二甲苯基桥的7元,8元,9元,14元,16元,18元和24元杂环系统。还描述了前一系列的氧类似物。讨论了化合物的1 H nmr和质谱。