Efficient synthesis of aliphatic sulfones by Mg mediated coupling reactions of sulfonyl chlorides and aliphatic halides
作者:Ying Fu、Qin-Shan Xu、Quan-Zhou Li、Zhengyin Du、Ke-Hu Wang、Danfeng Huang、Yulai Hu
DOI:10.1039/c7ob00251c
日期:——
Sulfonylchlorides were reduced to anhydrous sulfinate salts with magnesium under sonication. These sulfinates were alkylated to sulfones with alkyl chlorides in the presence of catalytic sodium iodide under sonication. A variety of aliphatic sulfones was efficiently prepared by this one-pot two-step procedure.
A new bench stable reagent that is easily synthesized and handled is investigated for its use in radical prenylation of diverse organic molecules. It has demonstrated high functional group compatibility and can be used with numerous photocatalytic methods to give prenylated products from aryl iodides, bromides, anilines, thiols and alkyl halides.
Palladium-Catalyzed Aromatic Sulfonylation: A New Catalytic Domino Process Exploiting in situ Generated Sulfinate Anions
作者:David Madec、Giovanni Poli、Gaëtan Le Duc、Elise Bernoud、Guillaume Prestat、Sandro Cacchi、Giancarlo Fabrizi、Antonia Iazzetti
DOI:10.1055/s-0031-1289880
日期:2011.12
Allylic sulfones are excellent precursors of aryl sulfones via a new Pd-catalyzed domino sequence involving in situ generation of sulfinate anions and subsequent cross-coupling with aryl iodides or bromides. sulfones - sulfinate anions - catalysis - palladium - domino reaction
Enantioselective Synthesis of α-Amino-γ-sulfonyl Phosphonates with a Tetrasubstituted Chiral α-Carbon<i>via</i>Quinine-Squaramide-Catalyzed Michael Addition of Nitrophosphonates to Vinyl Sulfones
作者:Kalisankar Bera、Irishi N. N. Namboothiri
DOI:10.1002/adsc.201300224
日期:2013.5.3
α‐Nitro‐γ‐sulfonylphosphonates with a key tetrasubstituted chiral α‐carbon center have been synthesized for the first time in high yield and enantioselectivity through a quinine‐squaramide‐catalyzed conjugate addition of α‐nitro phosphonates to aryl vinyl sulfones. Representative examples presented here for the transformation of nitrosulfonyl phosphonates to aminosulfonyl phosphonates, alkylation
A direct nitration of vinylcyclopropanes is disclosed with Cu(NO3)2 and KI in a regio- and stereoselective manner to afford nitroalkenes efficiently, where the cyclopropane skeleton was retained. The given method could be extended to other vinylcycles as well as biomolecule derivatives with wide substrate scope, good functionality tolerance, and efficient synthesis modularity. Further transformations
公开了用 Cu(NO 3 ) 2和 KI 以区域选择性和立体选择性方式对乙烯基环丙烷进行直接硝化,以有效地得到硝基烯烃,其中保留了环丙烷骨架。给定的方法可以扩展到其他乙烯基环以及具有广泛底物范围、良好功能耐受性和高效合成模块化的生物分子衍生物。进一步的转化表明所获得的产品是有机合成中的通用构建块。所提出的离子途径可以解释未接触的小环和反应过程中 KI 的影响。