Evaluation of catalytic activity of two newly prepared functionalized sulfonic acids ionic liquids in the synthesis of carbamatoalkyl naphthols under mild conditions
作者:M. Dehghan、A. Davoodnia、M. R. Bozorgmehr、F. F. Bamoharram
DOI:10.1134/s1070363217020268
日期:2017.2
activity of two newly prepared functionalizedsulfonicacids ionic liquids, [MPyrrSO3H]Cl (IL1) and [MMorSO3H]Cl (IL2), is studied in one-pot three-component synthesis of carbamatoalkyl naphthols by the reaction of β-naphthol with aromatic aldehydes and methyl or benzyl carbamate. The efficientlycatalyzed reaction proceeded under solvent-free conditions. The synthesis was characterized by easy work-up
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
Preparation of methyl/benzyl(2-hydroxynaphthalen-1-yl)(aryl)methylcarbamate derivatives using magnesium hydrogen sulfate
作者:Majid Ghashang
DOI:10.1007/s11164-013-1044-0
日期:2014.4
A new approach to the synthesis of methyl/benzyl(2-hydroxynaphthalen-1-yl)(aryl)methylcarbamate derivatives based on the reaction of aldehydes, 2-naphthol and methyl/benzyl carbamate, using a catalytic amount of magnesium hydrogen sulfate [Mg(HSO4)2] as an efficient heterogeneous catalyst under solvent-free conditions has been developed.
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.
Preparation of Methyl (2-hydroxynaphthalen-1-yl)(aryl)methyl/benzylcarbamate derivatives using magnesium (II) 2,2,2-trifluoroacetate as an efficient catalyst
作者:Mohammad Reza Mohammad Shafiee、Raheleh Moloudi、Majid Ghashang
DOI:10.3184/174751911x13182405888457
日期:2011.11
2-naphthol and methyl/benzyl carbamate have been done by using magnesium 2,2,2-trifluoroacetate [Mg(OOCCF3)2] as an efficient catalyst. This methodology results in the synthesis of a variety of methyl (2-hydroxynaphthalen-1-yl)(aryl)methyl/benzylcarbamate derivatives in high yields. Despite their importance from pharmacological and synthetic points of view, comparatively few methods for the preparation of 1-carbamatoalkyl
醛、2-萘酚和甲基/苄基氨基甲酸酯的多组分缩合反应已通过使用 2,2,2-三氟乙酸镁 [Mg(OOCCF3)2] 作为有效催化剂进行。这种方法导致以高产率合成各种甲基(2-羟基萘-1-基)(芳基)甲基/苄基氨基甲酸酯衍生物。尽管从药理学和合成的角度来看它们很重要,但通过醛、2-萘酚和氨基甲酸酯的多组分反应使用酸性催化剂制备 1-氨基甲酸烷基 2-萘酚衍生物的方法相对较少。2,2,2-三氟乙酸镁[Mg(OOCCF3)2]由三氟乙酸和氯化镁反应制备。制备的催化剂已通过粉末 X 射线衍射图表征。