Regioselective synthesis of phthalans via Cu(OTf)2-catalyzed 5-exo-dig intramolecular hydroalkoxylation of 2-(ethynyl)benzyl alcohols
作者:Chandrasekaran Praveen、Chandran Iyyappan、Paramasivan Thirumalai Perumal
DOI:10.1016/j.tetlet.2010.07.030
日期:2010.9
efficient, regioselective Cu(OTf)2-catalyzed 5-exo-dig intramolecular hydroalkoxylation of 2-(ethynyl)benzyl alcohol, which provides a concise access to functionalized phthalan in high yields has been developed. A wide range of substrates possessing terminal, internal, and heteroaromatic alkynes can be efficiently transformed into the targeted phthalans. Substrates with primary, secondary, and tertiary benzyl
一种高效,区域选择性的Cu(OTF)2催化的5-外型-挖2-(乙炔基)苄醇,它提供一个简明的访问以高收率官能phthalan的分子内hydroalkoxylation已经研制成功。具有末端,内部和杂芳族炔烃的多种底物可以有效地转化为目标邻苯二甲酸酯。具有伯,仲和叔苄醇的底物也进展良好,以高收率生产了相应的邻苯二甲酸酯。不论底物的性质如何,当区域选择性成为一个问题时,环化反应都遵循高度选择性的5- exo - dig区域化学。