Henri Rudler, Andrée Parlier, Victor Certal, Jean-Cédric Frison
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引用次数: 0
摘要
二氢吡啶诱导的铬烷氧羰基配合物的还原已推广到不同取代的二氢吡啶，如n -苄基二氢吡啶和n -甲基- n ' n ' -二乙基二氢烟碱酰胺。在所研究的所有案例中，烷氧炔基羰基羰基配合物通过级联插入导致丁烯内酯，非对映异构体的过量依赖于二氢吡啶的结构。
Functionalized dihydropyridines do reduce alkoxycarbene complexes of chromium and give access to polycyclic butenolides
The dihydropyridine-induced reduction of alkoxycarbene complexes of chromium has been generalized to differently substituted dihydropyridines, e.g. N-benzyl dihydropyridine and N-methyl-N’N’-diethyldihydronicotinamide. In all the cases examined, alkoxyalkynyl carbene complexes lead, upon cascade insertions, to butenolides, the diastereomeric excesses being dependent on the structure of the dihydropyridines.
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