Rh-catalyzed highly regioselective hydroformylation to linear aldehydes by employing porous organic polymer as a ligand
作者:Zhaozhan Wang、Yong Yang
DOI:10.1039/d0ra04816j
日期:——
In this work, we developed a new structural porous organic polymer containing biphosphoramidite unit, which can be used as a solid bidentate phosphorous ligand for rhodium-catalyzed solvent-free higher olefinshydroformylation. The resultant catalyst demonstrated unprecedently high regioselectivity to linear aldehydes and could be readily recovered for successive reuses with good stability in both
Synthesis of defucogilvocarcin V isosteres via MAD-mediated conjugate addition of carbanions to naphthoquinone ketals
作者:David J. Hart、Anthony Mannino
DOI:10.1016/s0040-4020(96)00054-3
日期:1996.3
Treatment of a complex between naphthoquinone ketal 7 and methylaluminum bis(2,6-di-tert-butyl-4-methylphenoxide (MAD) with aryllithium reagents prepared by metallation of oxazoline 13 and amide 18, gave conjugate adducts which were converted to defucogilvocarcin V analogs 2 and 3 via a short reaction sequence. Some problems encountered in the metallation of oxazoline 19, a structural analog of amide 18, are
Dimerization of phenols and naphthols using an aqueous sodium hypochlorite
作者:Ramesh Neelamegam、Matthew T. Palatnik、James Fraser-Rini、Mark Slifstein、Anissa Abi-Dargham、Balu Easwaramoorthy
DOI:10.1016/j.tetlet.2010.02.173
日期:2010.5
The observation of an unusual dimerization of phenols and naphthols using a sodium hypochlorite (NaOCl) in an aqueous solution is reported. NaOCl is an environmentally friendly and less expensive reagent than previously used reagents for dimerization. The yield of the dimer is moderate to high at ambient temperature. Published by Elsevier Ltd.