A Practical Synthesis of Regioisomeric 6- and 7-Methoxytetrahydro-3-benzazepines
摘要:
A concise and versatile synthetic route for 6- and 7-methoxy tetrahydro-3-benzazepines is described. The key feature of the synthesis is a one-pot acylatioti/cyclizaition/elimination sequence to construct either of the isomeric dihydrobenzazepine ring systems from the same starting material. The route is high yielding and chromatography-free.
synthesized via the intramolecular cross‐coupling reaction between the amino and aromatic bromine functionalities of 2‐bromophenethylamine derivatives in the presence of 10% palladium on carbon (Pd/C), 1,1′‐bis(diphenylphosphino)ferrocene (DPPF), and sodium tert‐butoxide (NaO‐t‐Bu) in mesitylene at 140 and 200 °C, respectively. The neutralization using acetic acid after formation of the indoline derivatives
A Practical Synthesis of Regioisomeric 6- and 7-Methoxytetrahydro-3-benzazepines
作者:Jimmy T. Liang、Jing Liu、Brock T. Shireman、Vi Tran、Xiaohu Deng、Neelakandha S. Mani
DOI:10.1021/op900292j
日期:2010.3.19
A concise and versatile synthetic route for 6- and 7-methoxy tetrahydro-3-benzazepines is described. The key feature of the synthesis is a one-pot acylatioti/cyclizaition/elimination sequence to construct either of the isomeric dihydrobenzazepine ring systems from the same starting material. The route is high yielding and chromatography-free.