Organocatalytic Asymmetric Synthesis of Dihydroisoquinolinones via a One-Pot Aza-Henry–Hemiaminalization–Oxidation Sequence
作者:Dieter Enders、Robert Hahn、Ehsan Jafari、Gerhard Raabe
DOI:10.1055/s-0034-1379398
日期:——
Moderate to good yields (39–78%) and moderate to very good enantioselectivities (40–95% ee) were reached. The asymmetric organocatalytic one-pot synthesis of trans-3,4-disubstituted 3,4-dihydroisoquinolin-1(2H)-ones is described. Starting from 2-(nitromethyl)benzaldehydes and various N-protected aldimines, 5 mol% of a quinine-based squaramide organocatalyst was used to synthesize the title compounds as
摘要 描述了反式-3,4-二取代3,4-二氢异喹啉-1(2 H )-酮的不对称有机催化一锅法合成。从 2-(硝基甲基)苯甲醛和各种 N-保护醛亚胺开始,使用 5 mol% 的奎宁基方酰胺有机催化剂通过氮杂-亨利-半胺化-氧化序列将标题化合物合成为几乎单一的非对映异构体。达到了中等至良好的产率(39-78%)和中等至非常好的对映选择性(40-95% ee)。 描述了反式-3,4-二取代3,4-二氢异喹啉-1(2 H )-酮的不对称有机催化一锅法合成。从 2-(硝基甲基)苯甲醛和各种 N-保护醛亚胺开始,使用 5 mol% 的奎宁基方酰胺有机催化剂通过氮杂-亨利-半胺化-氧化序列将标题化合物合成为几乎单一的非对映异构体。达到了中等至良好的产率(39-78%)和中等至非常好的对映选择性(40-95% ee)。