Providing a New Aniline Bioisostere through the Photochemical Production of 1-Aminonorbornanes
摘要:
This report describes the photochemical conversion of aminocyclopropanes into 1-aminonorbornanes via formal [3 + 2] cycloadditions initiated by homolytic fragmentation of amine radical cation intermediates. Aligning with the modern movement toward sp(3)-rich motifs in drug discovery, this strategy provides access to a diverse array of substitution patterns on this saturated carbocyclic framework while offering the robust functional-group tolerance (e.g., -OH, -NHBoc) necessary for further derivatization. Evaluating the metabolic stability of selected morpholine-based 1-aminonorbornanes demonstrated a low propensity for oxidative processing and no proclivity toward reactive metabolite formation, suggesting a potential bioisosteric role for 1-aminonorbornanes. Continuous-flow processing allowed for efficient operation on the gram scale, providing promise for translation to industrially relevant scales. This methodology only requires low loadings of a commercially available, visible-light-active photocatalyst and a simple salt; thus, it stays true to sustainability goals while readily delivering saturated building blocks that can reduce metabolic susceptibility within drug development programs.
Synthesis of γ-ketoamides via nucleophilic attack on iron tetracarbonyl complexes of α,β-unsaturated amides
作者:Annie Pouilhès、Susan E. Thomas
DOI:10.1016/s0040-4039(00)99673-4
日期:1989.1
Organolithium and Grignard reagents react with the readily-formed irontetracarbonylcomplexes of α,β-unsaturated amides to give γ-ketoamides in good yield acyl transfer from the metal to the β carbon of the α,β-unsaturated amide.
Compound comprising a fluorine-substituted alkyl group and a liposome contrast medium comprising the compound
申请人:Takahashi Kazunobu
公开号:US20080138285A1
公开(公告)日:2008-06-12
A steroid ester compound of a terminally-fluorinated alkyl fatty acid, a steroid compound having bis(trifluoromethyl)phenyl group, a phosphatidylserine compound having a terminally-fluorinated alkyl group, a glyceride compound having bis(trifluoromethyl phenyl group, or a glyceride compound having a terminally-fluorinated alkyl group. A vascular lesion can be selectively imaged by using a contrast medium comprising a liposome containing said compound or a salt thereof.