Copper/Silver-Mediated Cascade Reactions for the Construction of 2-Sulfonylbenzo[b]furans from trans-2-Hydroxycinnamic Acids and Sodium Sulfinates
摘要:
Efficient construction of 2-sulfonylbenzo[b]furans is achieved from readily available trans-2-hydroxycinnamic acids and sodium sulfinates mediated by the CuCl2 center dot 2H(2)O/AgTFA system under mild conditions. This unprecedented synthetic protocol provides expedient access to a series of products in one step via a protodecarboxylation/C-S bond formation/C-O bond formation cascade.
Synthesis of Diaryl Sulfones at Room Temperature: Cu-Catalyzed Cross-Coupling of Arylsulfonyl Chlorides with Arylboronic Acids
作者:Feng Hu、Xiangyang Lei
DOI:10.1002/cctc.201500174
日期:2015.5.18
An efficient and convenient method for the synthesis of diaryl sulfones was developed through the Cu‐catalyzedcross‐couplings of arylsulfonyl chlorides and arylboronicacids at room temperature in open air. This method is characterized by the use of inexpensive and readily available catalyst and substrates, mildreaction conditions, wide functionality tolerance, short reaction times for most substrates
A novel arylation of sulfonamides with boronic acids to afford numerous diaryl sulfones via a visible light-mediated N–S bond cleavage other than the typical transition-metal-catalyzed C(O)–N bond activation is described. This methodology, which represents the first catalyst-free protocol for the sulfonylation of boronic acids, is characterized by its simple reaction conditions, good functional group
novel radical substitutionreaction of aromatic sulfones is presented. Thus, α-heterocyclic aromatic sulphones derived from indole, pyrrole, pyrazole, furans and thiophenes undergo rapid and high yielding ipso-substitution to furnish organostannanes. This methodology has been extended to β-heterocyclic aromatic sulfones derived from indoline and dibenzofuran. The methodology has some liminations as
Photochemical Halogen-Bonding Promoted Synthesis of Vinyl Sulfones via Vinyl and Sulfonyl Radicals
作者:Zhou Jiang、Ke You、Haibo Wu、Mengyu Xu、Tao Wang、Jin Luo
DOI:10.1021/acs.orglett.3c03958
日期:2024.1.26
A photochemical halogen-bonding-assisted synthesis of vinyl sulfonesvia radical–radical cross-coupling of vinyl bromines and sodium sulfinates is developed. This methodology offers a facile and efficient approach to various vinyl sulfones with excellent functional group tolerance under metal-, photocatalyst-, base-, and oxidant-free conditions. The reaction is also applicable for the late-stage functionalization
<i>N</i>-Sulfonylbenzotriazoles as Advantageous Reagents for <i>C</i>-Sulfonylation
作者:Alan R. Katritzky、Ashraf A. A. Abdel-Fattah、Anatoliy V. Vakulenko、Hui Tao
DOI:10.1021/jo051157i
日期:2005.11.1
Reactions of readily available N-(alkyl-, aryl-, and heteroarylsulfonyl)benzotriazoles 3a-h with diverse nitriles, reactive heteroaromatics, alkylheteroaromatics, sulfones, and esters produced alpha-cyanoalkyl sulfones 5a-i, sulfonylheteroaromatics 7a-e, alpha-(sulfonylalkyl)heterocycles 9a-f, alpha-sulfonylalkyl sulfones 11a-g, and esters of alpha-sulfonyl acids 14a-c, respectively, in synthetically useful to excellent yields. The results represent the first examples of the successful application of sulfonylazoles for C-sulfonylation.