Selective Synthesis of <i>ortho-</i>Substituted Diarylsulfones by Using NHC-Au Catalysts under Mild Conditions
作者:Haibo Zhu、Yajing Shen、Daheng Wen、Zhang-Gao Le、Tao Tu
DOI:10.1021/acs.orglett.8b03957
日期:2019.2.15
A single-step gold(I)-catalyzed chemoselective protocol to access ortho-substituted diarylsulfones has been established. Acenaphthoimidazolylidene gold complexes are effective catalysts for the arylsulfonylation of boronic acids by potassium metabisulfite (K2S2O5) and diaryliodonium salts to access (poly-)ortho-substituted diarylsulfones even in gram scale. Unlike the transition metal-catalyzed two-component
已经建立了一步金(I)催化的化学选择方案以访问邻位取代的二芳基砜。ena啶咪唑基亚金络合物是焦亚硫酸氢钾(K 2 S 2 O 5)和二芳基碘鎓盐对硼酸进行芳基磺酰化的有效催化剂,即使以克为单位,也可得到(多)邻位取代的二芳基砜。与过渡金属催化的双组分偶联系统不同,二芳基碘鎓盐中的位阻芳基优先转移到体积较小的芳基上,以形成合成困难的靶标,包括具有药学重要性的靶标。
Metal-free sulfonylation of arenes with <i>N</i>-fluorobenzenesulfonimide <i>via</i> cleavage of S–N bonds: expeditious synthesis of diarylsulfones
N-fluorobenzenesulfonimide (NFSI) toward the synthesis of diarylsulfones has been developed. The reaction represents a rare example of sulfonylation reaction using NFSI as an efficient sulfonyl donor and the first example of acid-mediated sulfonylation of unactivated arenes with NFSI via selective cleavage of S–N bonds. This protocol provides a concise approach for the construction of pharmaceutically
Manipulatively simple and rapid methods are described for the synthesis of: chiral sulfinate esters from sulfonyl chlorides and sufonic acids; aldehydes and ketones from oximes, alcohols, hydrozones; sulfoxides from sulfides; and disulfides from thiols. The chemical yields are good to excellent and diastereoselectivity is high.
Hajipour; Mallakpour; Imanzadch, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2001, vol. 40, # 3, p. 237 - 239
作者:Hajipour、Mallakpour、Imanzadch
DOI:——
日期:——
Gurumani, V.; Swaminathan, M.; Mangalamudaiyar, A., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1993, vol. 32, # 2, p. 281 - 287
作者:Gurumani, V.、Swaminathan, M.、Mangalamudaiyar, A.