One-pot odorless thia-Michael reaction by copper ferrite nanoparticle-catalyzed reaction of elemental sulfur, aryl halides and electron-deficient alkenes
作者:Mohammad Gholinejad、Habib Firouzabadi
DOI:10.1039/c5nj00867k
日期:——
In this article we report a non-odorous protocol for the high yield formation of aryl–alkyl sulfides by the reaction of aryl iodides, bromides and boronicacids with elementalsulfur and electron-deficient alkenes, catalyzed by copper ferrite nanoparticles. The catalyst was easily separated using an external magnetic bar and recycled for subsequent runs, its catalytic activity being preserved.
CuI‐catalyzed tandem synthesis of thioethers using aryl halides, electron‐deficient alkenes, and sodium
<i>iso</i>
‐propyl xanthogenate
作者:Mohammad Abbasi、Najmeh Nowrouzi、Rahimeh Khezri
DOI:10.1002/aoc.5553
日期:2020.4
A ligand‐free, CuI‐catalyzed protocol was developed for the one‐step preparation of Michael adducts of aromatic thiols in high yields by reacting a mixture of an arylhalide and an electron‐deficientalkene with sodiumiso‐propylxanthogenate.
Electrolytic Partial Fluorination of Organic Compounds. 19. A Novel Synthesis of Fluorothieno[2,3-b]pyridines Using Anodic Fluorination of Heterocyclic Sulfides as a Key Step
作者:Ayman W. Erian、Akinori Konno、Toshio Fuchigami
DOI:10.1021/jo00128a044
日期:1995.11
Highly regioselective anodic monofluorination of 2-pyridyl and C-pyrimidinyl sulfides bearing various electron-withdrawing groups were successfully carried out. The fluorinated sulfides were easily converted into 2-fluorothieno[2,3-b]pyridines in good yields.
Efficient Generation of C-S Bonds<i>via</i>a By-Product-Promoted Selective Coupling of Alcohols, Organic Halides, and Thiourea
alcohols, heteroaryl halides, and thiourea has been developed for direct and selective synthesis of heteroaryl thioethers. This method can be easily scaled up to the gram scale and extended to dialkyl thioethers, heteroaryl selenides, benzothiazoles, and some antimycobacterially‐active thioethers. Mechanisticstudies revealed that a by‐product‐promoted in situ C–O activation of alcohols to more reactive
Base‐Activated Latent Heteroaromatic Sulfinates as Nucleophilic Coupling Partners in Palladium‐Catalyzed Cross‐Coupling Reactions
作者:Xinlan A. F. Cook、Loïc R. E. Pantaine、David C. Blakemore、Ian B. Moses、Neal W. Sach、Andre Shavnya、Michael C. Willis
DOI:10.1002/anie.202109146
日期:2021.10.4
effective nucleophilic reagents in Pd0-catalyzed cross-coupling reactions with aryl halides. However, metal sulfinate salts can be challenging to purify, solubilize in reaction media, and are not tolerant to multi-step transformations. Here we introduce base-activated, latent sulfinate reagents: β-nitrile and β-ester sulfones. We show that under the cross-couplingconditions, these species generate