使用十钨酸盐阴离子作为光催化剂,实现了使用硫代磺酸盐的位点选择性 C(sp 3 )–H 硫醇化。使用该方案,以良好的产率合成了多种硫醇化化合物。该转化由一系列双 S H 2 反应、HAT 和 ArS 基团转移以及离开芳基磺酰基到芳基亚磺酸的 PCET(质子耦合电子转移)组成,从而使催化剂 W 10 O 32 4−成为恢复了。
Facile Approach for C(sp3)–H Bond Thioetherification of Isochroman
作者:Chun Cai、Jie Feng、Guoping Lu、Meifang Lv
DOI:10.1055/s-0034-1380125
日期:——
An unprecedented C–S formation protocol via the direct oxidative C(sp3 )–H bond thioesterification of isochroman under metal-free conditions was developed. A series of isochroman derivatives could be afforded efficiently by the green, simple, and atom-economical method.
Efficient C−S Bond Formation by Direct Functionalization of C(
<i>sp</i>
<sup>3</sup>
)−H Bond Adjacent to Heteroatoms under Metal‐Free Conditions
作者:Feng Zhao、Qi Tan、Dahan Wang、Jinjin Chen、Guo‐Jun Deng
DOI:10.1002/adsc.201900666
日期:2019.9.3
A simple and efficient method for the formation of C−Sbond via directfunctionalization of C(sp3)−H bond adjacent to heteroatoms was described under metal‐free conditions. In this work, stable and easily accessible sodium sulfinates were used as the thiolating agents to afford various aryl thioethers in moderate to excellent yields. Mechanistic explorations show that a radical pathyway is possibly
Metal-Free Oxidative C(sp<sup>3</sup>)–H Bond Thiolation of Ethers with Disulfides
作者:Sheng-rong Guo、Yan-qin Yuan、Jian-nan Xiang
DOI:10.1021/ol402281f
日期:2013.9.20
A novel method for the preparation of alkyl aryl sulfides through direct oxidationthiolation of commercial ethers with diaryl disulfides using di-tert-butyl peroxide (DTBP) as the oxidant without a metal catalyst was established. The C(sp3)–Hbond in various ethers was successfully converted into a C–S bond, and the corresponding sulfides were achieved with moderate to high yields.
Visible-Light-Induced Direct Thiolation at α-C(sp<sup>3</sup>)–H of Ethers with Disulfides Using Acridine Red as Photocatalyst
作者:Xianjin Zhu、Xiaoyu Xie、Pinhua Li、Jianqi Guo、Lei Wang
DOI:10.1021/acs.orglett.6b00304
日期:2016.4.1
α-arylthioethers through a visible-light-induced direct thiolation at α-C(sp3)–H of ethers with diaryldisulfides was developed using acridine red as a novel photocatalyst. The reactions occurred at ambient conditions and generated the corresponding products in good to excellent yields, ignoring steric effect of disulfides.
A visible-light-promoted direct thiolation of α-C(sp3)–H in ethers with thiosulfonates was developed for the preparation of α-arylthioethers using easily availably Na2-eosin Y and TBHP as a photocatalyst and oxidant. This reaction occurred smoothly under the irradiation of 5 W blue light at room temperature and generated the corresponding products in good to excellent yields.
使用容易获得的 Na 2 -伊红 Y 和 TBHP 作为光催化剂和氧化剂,开发了可见光促进的 α-C(sp 3 )–H 在醚中与硫代磺酸盐的直接硫醇化,用于制备 α-芳基硫醚。该反应在室温下5W蓝光照射下顺利进行,并以优良的收率生成相应的产物。