A one-pot synthesis of tetrahydroisoquinolin-4-ols via a novel acid-catalyzed rearrangement of 5-aryloxazolidines
作者:Vladimir S. Moshkin、Vyacheslav Ya. Sosnovskikh
DOI:10.1016/j.tetlet.2013.02.087
日期:2013.5
nonstabilized azomethine ylide derived from sarcosine and formaldehyde to form 5-aryloxazolidines as intermediates, which undergo rearrangement into 2-methyl-1,2,3,4-tetrahydroisoquinolin-4-ols in high yields by simple heating with hydrochloric acid. This one-pot synthesis of tetrahydroisoquinolines can be considered as a formal [3+3] cycloaddition of the azomethine ylide to the aromatic aldehyde.
带有给电子取代基的
苯甲醛与
肌氨酸和
甲醛衍生的不稳定的偶氮甲
嘧啶内酯平稳反应,形成5-芳基
恶唑烷作为中间体,高产率地重排为
2-甲基-1,2,3,4-四氢异喹啉-4-醇。通过用
盐酸简单加热。一锅合成的
四氢异喹啉可以认为是甲
亚胺叶立德与芳族醛的正式[3 + 3]环加成反应。