Zur Cyclisierung von α-(2-Mercapto- bzw. -2-Amino-benzoyl)-lactamen; Synthese von Benzothiopyrano [4,3-b]pyrrolinonen sowie von Pyrrolino- bzw. Tetrahydropyridino [3,2-c] chinolinonen1)
作者:Fritz Eiden、Egmont Baumann
DOI:10.1002/ardp.19833161102
日期:——
Die Mercapto‐ bzw. Methylamino‐benzoyllactame 6a, 6b, 6d, 6e und 6f lassen sich durch Erhitzen in die Benzothiopyrano‐pyrrolinone bzw. Pyrrolino‐chinolinone 8a, 8b, 8d, 8e und 8f überführen, wobei nach Pyridinhydrochlorid‐Zusatz die N‐Methylgruppe des Pyrrolinrings unter Bildung von 8c bzw. 8g abgespalten wird. Aus dem Acylpyridon 6i kann so das Tetrahydropyridino‐chinolinon 18 gewonnen werden.
Ruthenium-catalyzed synthesis of <i>N</i>-substituted lactams by acceptorless dehydrogenative coupling of diols with primary amines
作者:Yanling Zheng、Xufeng Nie、Yang Long、Li Ji、Haiyan Fu、Xueli Zheng、Hua Chen、Ruixiang Li
DOI:10.1039/c9cc06339k
日期:——
Herein, we report the first example of synthesis of N-substituted lactams via an acceptorless dehydrogenative coupling of diols with primaryamines in one step, which was enabled by combining Ru3(CO)12 with a hybrid N-heterocyclic carbene–phosphine–phosphine ligand as the catalyst.
Synthesis of Pyrrolidines and Pyrrolizidines with α-Pseudoquaternary Centers by Copper-Catalyzed Condensation of α-Diazodicarbonyl Compounds and Aryl γ-Lactams
usually dicarbonyl compounds, in a copper‐catalyzed process to yield functionalized pyrrolidines with α‐pseudoquaternary centers. As 1,2‐acyl or ‐phosphoryl migration is preferred, single regioisomers are obtained. Furthermore, in the presence of a Lewis acid, subsequent Friedel–Crafts reactions yield tricyclic pyrrolizidines in excellent yields (90–96 %) and diastereoselectivities (up to >20:1).
Benzyl(idene)-lactam derivatives, their preperation and their use as selective (ant)agonists of 5-HT1A- and/or 5-HT1D receptors
申请人:Pfizer Inc.
公开号:US20030027812A1
公开(公告)日:2003-02-06
The present invention relates to lactam derivatives of the formula
1
wherein R
1
, R
2
, R
3
, A, X, Z, n and the dashed line are defined herein, and pharmaceutical compositions thereof, to processes and intermediates for their preparation, and to their medicinal use as selective agonists and antagonists of serotonin 1 (5-HT
1
) receptors, specifically, of one or both of the 5-HT
1A
and 5-HT
1D
receptors. These compounds are useful in treating or preventing migraine, depression and other disorders for which a 5-HT
1
agonist or antagonist is indicated.
α‐Angelica Lactone Catalyzed Oxidation of Pyrrolidines to Lactams
作者:Siddharth K. Deepake、Manish Kumar、Pawan Kumar、Utpal Das
DOI:10.1002/ejoc.202200712
日期:2022.8.19
An efficient method for the direct oxidation of various N-aryl pyrrolidines to the corresponding lactams using α- angelica lactone as catalyst has been demonstrated. Di-oxygen was employed as the terminal oxidant and oxygen source.