Investigations on Gold‐Catalyzed Thioalkyne Activation Toward Facile Synthesis of Ketene Dithioacetals
作者:Xiaohan Ye、Jin Wang、Shengtao Ding、Seyedmorteza Hosseyni、Lukasz Wojtas、Novruz G. Akhmedov、Xiaodong Shi
DOI:10.1002/chem.201702710
日期:2017.8.4
from a gold‐associated thioketene intermediate. Based on this interesting mechanistic insight, a gold(I)‐catalyzed thioether addition to thioalkynes was developed as a novel approach to prepare ketenedithioacetals with good yields and high efficiency.
Rhodium-Catalyzed Denitrogenative [2,3] Sigmatropic Rearrangement: An Efficient Entry to Sulfur-Containing Quaternary Centers
作者:Dongari Yadagiri、Pazhamalai Anbarasan
DOI:10.1002/chem.201302653
日期:2013.11.4
blocks: α‐Sulfenylated imines containing a quaternary center, an ubiquitous subunit and excellent building block, were achieved by rhodium‐catalyzed denitrogenative [2,3] sigmatropic rearrangements of N‐sulfonyl‐1,2,3‐triazoles with allylaryl(alkyl) sulfides. Coupling of this methodology with a copper‐catalyzed cycloaddition reaction provides a platform for the direct regioselective functionalization of
Silica-promoted facile synthesis of thioesters and thioethers: a highly efficient, reusable and environmentally safe solid support
作者:Basudeb Basu、Susmita Paul、Ashis K. Nanda
DOI:10.1039/b925620b
日期:——
An efficient, mild and rapid procedure for the acylation and alkylation of aromatic and aliphatic thiols mediated on a silica gel surface at room temperature is described. The protocol allows the protection of thiols under neutral heterogeneous conditions without requiring any bases or Lewis acids, and the silica gel used as the promoter can be recycled for several runs without any loss of activity.
precursors in reactions with thioethers under the catalysis of a commercially available Ru(II) complex, from which a variety of sulfimides were synthesized efficiently and mildly. If an allyl group is contained in the thioether precursor, the [2,3]-sigmatropic rearrangement of the sulfimide occurs simultaneously and the N-allyl-N-(thio)amides were obtained as the final products. Preliminary mechanistic studies
Hemin Catalyzed Dealkylative Intercepted [2, 3]‐Sigmatropic Rearrangement Reactions of Sulfonium Ylides with 2, 2, 2‐Trifluorodiazoethane
作者:Xiaojing Yan、Chang Li、Xiaofei Xu、Xiaoyong Zhao、Yuanjiang Pan
DOI:10.1002/adsc.201901534
日期:2020.5.12
A dealkylative intercepted [2, 3]‐sigmatropic rearrangement reaction of allylic sulfides with 2, 2, 2‐trifluorodiazoethane (CF3CHN2) is reported, the commercially available and biocompatible catalyst hemin was found to efficiently catalyze this transformation across a diverse set of allylic sulfides with in situ generated CF3CHN2, providing excellent yields (up to 99%) under mild condition without