Solvent-free one-pot synthesis of 1-carbamatoalkyl-2-naphthols by a tin tetrachloride catalyzed multicomponent reaction
作者:Min Wang、Qing L. Wang、Shuang Zhao、Xin Wan
DOI:10.1007/s00706-013-0927-5
日期:2013.7
AbstractAn efficient one-potsynthesis of 1-carbamatoalkyl-2-naphthols using tin tetrachloride as a catalyst for the three-component condensation reaction of 2-naphthol, aldehydes, and carbamates under thermal, solvent-free conditions is described. This new approach has advantages such as mild conditions, short reaction time, high yield, simple work-up, and an inexpensive catalyst. Graphical Abstract
A convenient three-component synthesis of carbamatoalkyl naphthols catalyzed by cerium ammonium nitrate
作者:M. Wang、Y. Liu、Z. Song、S. Zhao
DOI:10.4314/bcse.v27i3.11
日期:——
A highly efficient synthesis of carbamatoalkyl naphthols has been performed by a one-pot three-component condensation of 2-naphthol, aldehydes, and methyl/ethyl/benzyl carbamates in the presence of cerium ammonium nitrate under solvent-free conditions at 70 oC. The solvent, optimal amounts of raw materials and catalyst, and reaction temperature are investigated. Experimental results show that only 0.1 mmol catalyst is enough to induce the conversion. Most reactions are performed within a short reaction time. The structures of all products were characterized by IR, 1H NMR, 13C NMR, MS, and elemental analysis. A mechanism to rationalize the reaction has been proposed.
Efficient one-pot synthesis of 1-carbamatoalkyl-2-naphthols using aluminum methanesulfonate as a reusable catalyst
作者:Zhiguo Song、Xiaohu Sun、Lianli Liu、Yan Cui
DOI:10.1007/s11164-012-0744-1
日期:2013.5
A wide range of 1-carbamatoalkyl-2-naphthols were synthesized via a one-pot three-component condensation of 2-naphthol, aldehydes, and carbamates in the presence of aluminum methanesulfonate at 70 °C under solvent-free conditions. The catalyst is reusable and could be recycled for several runs without any distinct decrease in its efficiency. A plausible mechanism for this three-component reaction was proposed.