It was found that 4-hydroxy-2-butenoic ester (11) could not react with 3,4-dihydro-isoquinoline (4a). Individual addition reactions of γ-mercapto-α,β-unsaturated esters (18) and -unsaturated amide (19) with 3,4-dihydroisoquinolines (4) were carried out under appropriate conditions to provide the corresponding thiazolo[2,3-α]isoquinoline derivatives with good yields (up to 87%) and significant diastereomeric
发现
4-羟基-2-丁烯酸酯(11)不能与3,4-二氢-
异喹啉( 4a )反应。γ-巯基-α,β-不饱和酯(18 )和-不饱和酰胺(19 )与
3,4-二氢异喹啉(4)的单独加成反应在适当的条件下进行,以提供相应的
噻唑并[2,3-α ]
异喹啉衍
生物具有良好的产率(高达 87%)和显着的非对映异构选择性。讨论了关键反应的机理。