Tandem additions of 3,4-dihydroisoquinolines to γ-hydroxy-α,β-unsaturated ketones: a green and new access to oxazolo[2,3-a]tetrahydroisoquinolines
作者:Sheng-Han Huang、Yu-Wei Shih、Wen-Tse Huang、Deng-Hong Li、Te-Fang Yang
DOI:10.1039/c6ra20708a
日期:——
Addition reaction of 3,4-dihydroisoquinolines with γ-hydroxy-α,β-unsaturated ketones furnished a variety of diastereomerically pure oxazolo[2,3-a]tetrahydro-isoquinolines, which could be purified by either recrystallization or solvent evaporation. The reaction proceeded smoothly under “green” conditions without an additive and catalyst, giving the target molecules in good to excellent yields.
3,4-二氢异喹啉与γ-羟基-α,β-不饱和酮的加成反应提供了多种非对映体纯的恶唑并[2,3 - a ]四氢异喹啉,可以通过重结晶或溶剂蒸发法将其纯化。在没有添加剂和催化剂的“绿色”条件下,反应可顺利进行,从而使目标分子的收率良好至极佳。