Synthesis of bridgehead fluorides by fluorodeiodination
摘要:
Fluorodeiodination is found to be an attractive procedure for the synthesis of bridgehead fluorides. Thus, treatment of the corresponding iodide with xenon difluoride in dichloromethane at ambient temperature generally leads to high yields of the fluoride. Evidence suggests the intermediacy of the bridgehead cation in this reaction, and accordingly the substrates which are unfavorably disposed to fluorodeiodination are the bicyclo[n.1.1]alkyl iodides. In this context the isolation of a small quantity of methyl 4-fluorobicyclo[2.1.1]hexane-1-carboxylate (46, R = COOMe) is significant because it represents the first occasion on which the elusive 1-bicyclo[2.1.1]hexyl cation has been trapped. We have also demonstrated that synthesis of the iodides themselves can be accomplished efficiently both by Barton halodecarboxylation and by treatment of the carboxylic acid with lead tetraacetate and iodine.
[EN] INHIBITORS OF INDOLEAMINE 2,3-DIOXYGENASE AND/OR TRYPTOPHAN 2,3-DIOXYGENASE<br/>[FR] INHIBTEURS DE L'INDOLÉAMINE 2,3-DIOXYGÉNASE ET/OU DU TRYPTOPHANE DIOXYGÉNASE
申请人:IDORSIA PHARMACEUTICALS LTD
公开号:WO2019034725A1
公开(公告)日:2019-02-21
The present invention relates to compounds of Formula (I) inhibiting indoleamine 2,3-dioxygenase (IDO) and/or tryptophan 2,3-dioxygenase (TDO) enzymes. Further, their synthesis and their use as medicaments in inter alia cancer is disclosed.
Photochemistry of alkyl halides. 4. 1-Norbornyl, 1-norbornylmethyl, 1- and 2-adamantyl, and 1-octyl bromides and iodides
作者:Paul J. Kropp、Graham S. Poindexter、Norbert J. Pienta、David C. Hamilton
DOI:10.1021/ja00441a043
日期:1976.12
Competing ionic and radical photobehavior has been observed for a number of alkyl halides. The proportion of nucleophilic substitution and reduction products were reported for each halide. Solventeffects of ethylene glycol, triethylamine, and methanol and atmospheric effects of nitrogen, oxygen, and air were studied. The effect of irradiation of the halides with methanol-O-d was reported. The results
Synthesis, Structure, and Conformational Dynamics of Bridgehead-Substituted Nitrosamines. Di-1-adamantylnitrosamine and Di-1-norbornylnitrosamine
作者:Haripada Sarker、Melinda L. Greer、Silas C. Blackstock
DOI:10.1021/jo951842x
日期:1996.1.1
The synthesis of two bridgehead-substituted nitrosamines, di-1-adamantylnitrosamine (1) and di-1-norbornylnitrosamine (2), is described, and their solid state crystal structures are reported. Large bridgehead substituents increase the NNO angle of the nitrosamine (compared to that found for dimethylnitrosamine) without deconjugating the NNO pi system significantly. This structural change correlates
Über die Reaktion 1,2-disubstituierter Norbornane mit Dinatriumtetracarbonylferrat(-II). Vorläufige Mitteilung
作者:Hugo Camenzind、Ulrich Christian Vögeli、Reinhart Keese
DOI:10.1002/hlca.19830660118
日期:1983.2.2
Reductive elimination at 1,2exo-diiodonorbornane (6) was induced by Collman's reagent. Surprisingly, 1,2endo-diiodonorbornane (9) and 1-iodo-2endo-trifluoromethylsulfonyloxy-norbornane (10b) lead only to reactions of the substituent in 2-position. Mechanistic aspects are related to the reactions of monosubstituted iodonorbornanes with Collman's reagent.
[EN] JNK INHIBITOR, PHARMACEUTICAL COMPOSITION THEREOF AND USE THEREOF<br/>[FR] INHIBITEUR DE LA JNK, COMPOSITION PHARMACEUTIQUE ASSOCIÉE ET UTILISATION ASSOCIÉE<br/>[ZH] JNK抑制剂、其药物组合物和用途