Copper and triphenylphosphine-promoted sulfenylation of quinones with arylsulfonyl chlorides
作者:Xiaoli Yu、Qiujin Wu、Huida Wan、Zhaojun Xu、Xingle Xu、Dawei Wang
DOI:10.1039/c6ra11301j
日期:——
The efficient copper and triphenylphosphine-promoted sulfenylation of quinones with arylsulfonyl chlorides has been developed under mild conditions with moderate to good yields. Significantly, this provides an alternative method to synthesise arylthioquinone derivatives. This is the first time that arylthioquinones with arylsulfonyl chlorides as starting material have been prepared, which avoids the
Oxidative radical coupling of hydroquinones and thiols using chromic acid: one-pot synthesis of quinonyl alkyl/aryl thioethers
作者:T. P. Adarsh Krishna、Sakthivel Pandaram、Suresh Chinnasamy、Andivelu Ilangovan
DOI:10.1039/d0ra01519a
日期:——
An efficient, simple and practical protocol for one-pot sequential oxidative radical C–H/S–H cross-coupling of thiols with hydroquinones (HQs) and oxidation leading to the formation of quinonyl alkyl/aryl thioethers using H2CrO4 was developed. This cross-coupling of thiyl and aryl radicals offers mono thioethers in good to moderate yield and works well with a wide variety of thiols. Similarly, this
The convenient synthesis and reaction of 2-(arylthio)phenols under ligand-free conditions: arylthioquinone preparation through cascade C–H functionalization and oxidation from arylthiols and aryl iodides
作者:Dawei Wang、Xiaoli Yu、Likui Wang、Wei Yao、Zhaojun Xu、Huida Wan
DOI:10.1016/j.tetlet.2016.10.028
日期:2016.11
A convenient and simple method for copper-catalyzed synthesis of 2-(arylthio)phenols through C–H functionalization of arylthiols and aryl iodides was developed under ligand-free conditions without nitrogen protection. In addition, arylthioquinone derivatives were very easily prepared for one more step of oxidation with moderate to good yields. This provide an alternative and efficient way to 2-(arylthio)phenols
Diels−Alder Reactions with 2-(Arylsulfinyl)-1,4-benzoquinones: Effect of Aryl Substitution on Reactivity, Chemoselectivity, and π-Facial Diastereoselectivity
作者:M. Carmen Carreño、José L. García Ruano、Antonio Urbano、Cynthia Z. Remor、Yolanda Arroyo
DOI:10.1021/jo9913107
日期:2000.1.1
Eu(fod)(3)- or BF(3).OEt(2)-catalyzed conditions. The synthesis of endo-adduct [4aS,5S,8R,8aR,SS]-9d resulting from cycloaddition on the substituted C(2)-C(3) double bond was achieved in a chemo- and diastereoselective way from quinone 1d in the presence of ZnBr(2). The reactivity and selectivity of the process proved to be dependent on the electron density of the arylsulfinyl group.