Palladium-<i>meta</i>-Terarylphosphine Catalyst for the Mizoroki–Heck Reaction of (Hetero)Aryl Bromides and Functional Olefins
作者:Daniel Weiliang Tay、Howard Jong、Yee Hwee Lim、Wenqin Wu、Xinying Chew、Edward G. Robins、Charles W. Johannes
DOI:10.1021/acs.joc.5b00386
日期:2015.4.17
a powerful catalyst system for the Mizoroki–Heck reaction. Using high-throughput screening (HTS) methodology, DMF and NaHCO3 were rapidly identified as the most effective solvent and base pair for the cross-coupling catalysis of challenging and industrially valuable substrates including highly electron-rich heteroaryl bromides and unactivated olefins. Unprotected functional groups were well tolerated
Copper-catalyzed highly selective direct hydrosulfonylation of alkynes with arylsulfinic acids leading to vinyl sulfones
作者:Wei Wei、Jinli Li、Daoshan Yang、Jiangwei Wen、Yueting Jiao、Jinmao You、Hua Wang
DOI:10.1039/c3ob42522c
日期:——
Copper-catalyzed direct hydrosulfonylation of alkynes with arylsulfinic acids for the synthesis of (E)-vinyl sulfones has been developed with 100% atom efficiency.
铜催化的炔烃与芳基亚砜酸直接进行烷基化反应,用于合成(E)-乙烯基亚砜,原子效率达到100%。
Copper-Catalyzed Aerobic Decarboxylative Sulfonylation of Cinnamic Acids with Sodium Sulfinates: Stereospecific Synthesis of (<i>E</i>)-Alkenyl Sulfones
A copper-catalyzed aerobic decarboxylative sulfonylation of alkenyl carboxylic acids with sodium sulfinates is developed. This study offers a new and expedient strategy for stereoselective synthesis of (E)-alkenyl sulfones that are widely present in biologically active natural products and therapeutic agents. Moreover, the transformation is proposed to proceed via a radical process and exhibits a broad
metal-free decarboxylative sulfonylation protocol for the preparation of (E)-vinyl sulfones from of β-aryl-α,β-unsaturated carboxylicacids using sodium sulfinates and (diacetoxyiodo)benzene (PhI(OAc)2) was developed. This strategy offers a simple and expedient synthesis of (E)-vinyl sulfones bearing a wide variety of functional groups. A radical-based pathway has been proposed for this decarboxylative sulfonylation
Mechanochemical-assisted decarboxylative sulfonylation of α,β-unsaturated carboxylic acids with sodium sulfinate salts
作者:Barakha Saxena、Roshan I. Patel、Shruti Sharma、Anuj Sharma
DOI:10.1039/d3gc04954j
日期:——
Developing a green and efficient method for synthesizing vinyl sulfones is challenging and highly desirable. We herein report a green, sustainable, and unprecedented mechanochemical-assisted approach for the decarboxylative sulfonylation of α,β-unsaturatedcarboxylicacids with sodium sulfinates using only potassium iodide (50 mol%) as an activator under water-assisted grinding conditions. A library