An environmentally benign and highly efficient supramolecular Michael addition of thiols from the secondary side of beta-cyclodextrin to alpha,beta-unsaturated compounds at the primary side in water is described in quantitative yields; products of undesirable side reactions resulting from polymerization are not observed; the use of cyclodextrin precludes the use of either acid or base and the catalyst
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.
A simple and green procedure for the conjugate addition of thiols to conjugated alkenes employing polyethylene glycol (PEG) as an efficient recyclable medium
作者:Ahmed Kamal、D. Rajasekhar Reddy、Rajendar
DOI:10.1016/j.tetlet.2005.09.082
日期:2005.11
Polyethylene glycol (PEG) is found to be an inexpensive, nontoxic, environmentally friendly reaction medium for the conjugate addition of thiols to conjugated alkenes to afford the corresponding adducts in excellent yields under mild and neutral conditions. Products of undesirable side reactions resulting from polymerization are not observed. The use of PEG avoids the use of either acid or base catalysts for this conversion and moreover PEG can be recovered and reused. (c) 2005 Elsevier Ltd. All rights reserved.
THAKKAR S. M.; MERCHANT J. R., CURR. SCI. (INDIA) <CUSC-AM>, 1976, 45, NO 5, 178
作者:THAKKAR S. M.、 MERCHANT J. R.
DOI:——
日期:——
Reactions of Mercaptans with Acrylic and Methacrylic Derivatives