Discovery of an in situ carbocationic system using trityl chloride as a homogeneous organocatalyst for the solvent-free condensation of β-naphthol with aldehydes and amides/thioamides/alkyl carbamates in neutral media
作者:Ardeshir Khazaei、Mohammad Ali Zolfigol、Ahmad Reza Moosavi-Zare、Fereshteh Abi、Abdolkarim Zare、Hamideh Kaveh、Vahid Khakyzadeh、Masoud Kazem-Rostami、Abolfath Parhami、Hossein Torabi-Monfared
DOI:10.1016/j.tet.2012.10.042
日期:2013.1
Trityl chloride (TrCl), efficiently catalyzes the one-pot multi-component condensation of β-naphthol with aromatic aldehydes and amides/thioamides/carbamates such as acetamide, benzamide, nicotinamide, thioacetamide, and methylcarbamate under solvent-free and neutral conditions to afford 1-amido-alkyl-2-naphthols, 1-thioamido-alkyl-2-naphthols, and 1-carbamato-alkyl-2-naphthols in high yields and very
三苯甲基氯(TrCl)在无溶剂和中性条件下有效催化β-萘酚与芳族醛和酰胺/硫代酰胺/氨基甲酸酯(如乙酰胺,苯甲酰胺,烟酰胺,硫代乙酰胺和氨基甲酸甲酯)的一锅多组分缩合反应,从而制得1-酰胺基烷基-2-萘酚,1-硫基氨基烷基-2-萘酚和1-氨基甲酰基烷基-2-萘酚的收率很高,反应时间很短。从机理上讲,有趣的是,通过原位生成具有固有不稳定性的三苯甲基碳阳离子的三苯甲基氯在中性介质中作为可重复使用的均相有机催化剂是有效的。