A copper-catalyzed 1,4-addition reaction of sulfonyl iodides with 1,3-enynes affording various allenyl halides in high yields under mild conditions has been developed. Mechanistic studies showed that the reaction proceeds through a radical mechanism.
Time and Atom Economical Regio‐ and Chemoselective Radical Cyclization of Unactivated 1,6‐Enynes Under Metal‐ and Oxidant‐Free Conditions
作者:Mohana Reddy Mutra、Jing Li、Yu‐Ting Chen、Jeh‐Jeng Wang
DOI:10.1002/chem.202200742
日期:2022.7.26
Chemical economics! Highly substituted five-membered heterocyclic compounds were synthesized from unactivated 1,6-enynes and sulfonyl halides undermetal, additive-free reaction conditions. These transformations can minimize chemical waste, save time, and simplify practical aspects compared to exiting protocols.
Rapid and Scalable Halosulfonylation of Strain‐Release Reagents**
作者:Helena D. Pickford、Vasyl Ripenko、Ryan E. McNamee、Serhii Holovchuk、Amber L. Thompson、Russell C. Smith、Pavel K. Mykhailiuk、Edward A. Anderson
DOI:10.1002/anie.202213508
日期:2023.1.16
hydrocarbons is described that proceeds under practical, scalable and mild conditions. Sulfonyl halides featuring aryl, heteroaryl and alkyl substituents are generated in situ from sulfinate salts and convenient halogen atom sources. This chemistry enables the synthesis of an array of halogen/sulfonyl-substituted bioisosteres and cyclobutanes, on up to multidecagram scale. Hal=Halogen.
Highly selective catalyst- and additive-free iodosulfonylation of cyclopropenes in water
作者:Chuxiong Peng、Fengyan Gu、Xiaofeng Lin、Ning Ding、Qichen Zhan、Peng Cao、Tao Cao
DOI:10.1039/d2gc04296g
日期:——
The construction of functionalized cyclopropanes is a hot topic in synthetic chemistry as they are important 3C starting materials and privileged structures in medicinal chemistry. By treating the readily available cyclopropenes with sulfonyl iodides in water, β-iodo cyclopropyl sulfones were diastereoselectively formed via a syn-addition process in high yields. Employment of water as the sole solvent
Synthesis of β-iodovinyl sulfones<i>via</i>direct photoinitiated difunctionalization of internal alkynes
作者:Vladimir A. Abramov、Maxim A. Topchiy、Maria A. Rasskazova、Egor A. Drokin、Grigorii K. Sterligov、Olga V. Shurupova、Anna S. Malysheva、Sergey A. Rzhevskiy、Irina P. Beletskaya、Andrey F. Asachenko
DOI:10.1039/d3ob00437f
日期:——
The reaction of direct photoinitiated iodosulfonylation of internal acetylenes with p-tolylsulfonyl iodide and its regioselectivity of the products was studied. Methods for the subsequent functionalization of β-iodovinylsulfones using cross-coupling reactions to obtain valuable and non-available compounds are proposed.