[EN] AVERMECTIN B1 AND AVERMECTIN B1 MONOSACCHARIDE DERIVATIVES HAVING AN ALKOXYMETHYL SUBSTITUENT IN THE 4"- OR 4'-POSITION [FR] DERIVES DE MONOSACCHARIDE D'AVERMECTINE B1 ET DERIVES D'AVERMECTINE B1 POSSEDANT UNE SUBSTITUANT ALKOXYMETHYLE EN POSITION 4' OU 4''
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.
TBHP-Mediated Oxidative Cross-Coupling of Disulfides with Ethers through a C(sp<sup>3</sup>)-H Thiolation Process
作者:Ya-Ping Hu、Ri-Yuan Tang
DOI:10.1080/00397911.2014.888081
日期:2014.7.18
Abstract A new tert-butyl hydroperoxide (TBHP)–mediated oxidative cross-coupling of disulfides with ethers is presented for the synthesis of etherified sulfides. This method is achieved by a C(sp3)-Hthiolation strategy under metal-free conditions and provides a simple route to constructing the C-S bonds. GRAPHICAL ABSTRACT
Photoinduced C(sp<sup>3</sup>)–H Chalcogenation of Amide Derivatives and Ethers via Ligand-to-Metal Charge-Transfer
作者:Ben Niu、Krishnakumar Sachidanandan、Maria Victoria Cooke、Taylor E. Casey、Sébastien Laulhé
DOI:10.1021/acs.orglett.2c01505
日期:2022.7.1
A photoinduced, iron(III) chloride-catalyzed C–H activation of N-methyl amides and ethers leads to the formation of C–S and C–Se bonds via a ligand-to-metal charge transfer (LMCT) process. This methodology converts secondary and tertiary amides, sulfonamides, and carbamates into the corresponding amido-N,S-acetal derivatives in good yields. Mechanistic work revealed that this transformation proceeds