Silver(I)-mediated reaction of trimethylsilylated arylacetylenes with sulfonyl chlorides: Unexpected formation of vinyl sulfones
作者:Gui Sheng Deng、Teng Fei Sun
DOI:10.1016/j.cclet.2012.07.017
日期:2012.10
Abstract A novel reaction of trimethylsilylated arylacetylenes with sulfonyl chlorides was performed in the presence of silver nitrate or triflate. Conjugated vinyl sulfones as dramatic products were obtained in moderate yields and with Z -selectivity. A free radical mechanism has been proposed to account for the formation of the products.
Photoredox-Catalyzed Radical–Radical Cross-Coupling of Sulfonyl Chlorides with Trifluoroborate Salts
作者:Sheng-Ping Liu、Yan-Hong He、Zhi Guan
DOI:10.1021/acs.joc.3c01124
日期:2023.8.4
synthesis of sulfone compounds with diverse structures by visible-light-catalyzed radical–radical cross-coupling of sulfonylchlorides and trifluoroborate salts. Allyl, benzyl, vinyl, and aryl trifluoroborates can be successfully cross-coupled with (hetero)aryl and alkyl sulfonylchlorides, respectively. This strategy features redox neutrality, good substrate generality, simple operation, and benign reaction
作者:Sujith、Russelisaac Premakumari, Steiny、Cho, Kyung-Bin、Lee, Anna
DOI:10.1021/jacs.4c03372
日期:——
encompasses a comprehensive experimental and computationalinvestigation, which provides valuable insights into the reaction mechanism. This investigation reveals two plausible isomerization pathways: a novel double spin-flip mechanism and a hydrogen atom transfer process in the presence of eosin Y. This study not only advances our understanding of isomerization mechanisms beyond conventional energy-transfer
热力学较差的( Z )-乙烯基砜的直接合成在有机合成中提出了显着的挑战。此外,( E )-和( Z )-乙烯基砜的立体发散合成的发展至关重要,但仍然难以实现。在这项研究中,我们提出了芳基取代炔烃的氢磺酰化,通过利用热力学和动力学控制实现了( E )-和( Z )-乙烯基砜的立体发散合成。值得注意的是,具有挑战性的( Z )-乙烯基砜的合成是通过动力学控制过程实现的,无需催化剂。为了合成( E )-乙烯基砜,采用非常规可见光介导的异构化作为促进向热力学有利形式转变的手段。本研究涵盖了全面的实验和计算研究,为反应机制提供了有价值的见解。这项研究揭示了两种可能的异构化途径:一种新颖的双自旋翻转机制和曙红 Y 存在下的氢原子转移过程。这项研究不仅增进了我们对传统能量转移途径之外的异构化机制的理解,而且还提供了一种稳健且可靠的异构化途径。合成( E )-和( Z )-乙烯基砜的可切换策略,从而为有机
Stereoselective Synthesis of <i>Z</i>-α,β-Unsaturated Sulfones Using Peterson Reagents
New Peterson reagents were prepared by introducing alkyloxy groups on the silicon atom in order to fix the conformation of the sulfone anion. The reagents 1d and 1e reacted with a variety of aldehydes after the treatment with Li-base to give Z-alpha,beta-unsaturated sulfones with up to >99:1 selectivity in good to excellent yields. For the reaction with aliphatic aldehydes, CPME (cyclopentyl methyl ether) is the choice of solvent, while DME (1,2-dimethoxyethane) gave higher selectivity for the reaction with aromatic aldehydes.
Palladium-Catalyzed Cascade Reaction of α,β-Unsaturated Sulfones with Aryl Iodides
作者:Pablo Mauleón、Angel A. Núñez、Inés Alonso、Juan C. Carretero
DOI:10.1002/chem.200390173
日期:2003.4.4
Unlike traditionally used acyclic 1,2-disubstituted alkenes, the reaction of alpha,beta-unsaturated phenyl sulfones with aryliodides under Heckreaction conditions (Pd(OAc)(2) as catalyst, Ag(2)CO(3) as base in DMF at 120 (0)C) takes place mainly by a cascade process, involving one unit of the alkene and three units of the aryliodide, to afford a substituted 9-phenylsulfonyl-9,10-dihydrophenanthrene