Activation of imide carbonyl group with trifluoromethanesulfonic acid facilitates the intramolecular cyclization of phenethylphthalimides to give a fused isoindoloisoquinolinone skeleton. The first one pot regioselective synthesis of isoindoloisoquinolinone alkaloid (±)-nuevamine has been successfully executed using this methodology.
Intermediates in the preparation of 2,3,4,5-tetrahydro-1H-3-benzazepines
申请人:Hoffmann-La Roche Inc.
公开号:US04065473A1
公开(公告)日:1977-12-27
A process for the preparation of heterocyclic compounds containing one nitrogen atom and novel 2,3,4,5-tetrahydro-1H-3-benzazepines prepared by this process are disclosed. The resulting heterocyclic compounds, including the novel 2,3,4,5-tetrahydro-1H-3-benzazepine derivatives, exhibit analgesic, appetite suppressant, and anti-edema activity.
Narang et al., Journal of the Chemical Society, 1932, p. 2510,2511
作者:Narang et al.
DOI:——
日期:——
One-Pot Cascade Trifluoromethylation/Cyclization of Imides: Synthesis of α-Trifluoromethylated Amine Derivatives
作者:Vinay Kumar Pandey、Pazhamalai Anbarasan
DOI:10.1021/jo5002998
日期:2014.5.2
Tryptamine- and phenethylamine-derived imides were selectively monotrifluoromethylated using CF3TMS. Subsequent methanesulfonic acid mediated cyclization of the intermediate hemiaminals afforded the alpha-trifluoromethylated amine derivatives via the formation of trifluoromethylated acyliminium ions, in one pot. The strategy was applicable to the both inter- and intramolecular versions. Furthermore, the utility of the present method was demonstrated through the synthesis of trifluoromethylated analogues of harmicine and crispine A.
A new synthesis of 4-aryl-2-benzazepine-1,5-diones