Synthesis and Conformational Analysis of Fluorinated Pipecolic Acids

被引:14
|
作者
Singh, Sukhdev [1 ,2 ]
Martinez, Claire-Marie [1 ]
Calvet-Vitale, Sandrine [1 ]
Prasad, Ashok K. [2 ]
Prange, Thierry [3 ]
Dalko, Peter I. [1 ]
Dhimane, Hamid [1 ]
机构
[1] Univ Paris 05, CNRS, UFR Biomed, Lab Chim & Biochim Pharmacol & Toxicol,UMR 8601, F-75270 Paris 06, France
[2] Univ Delhi, Dept Chem, Bioorgan Lab, Delhi 110007, India
[3] Univ Paris 05, CNRS, Fac Pharm 4, Lab Cristallog & RMN Biol,UMR 8015, F-75270 Paris 06, France
关键词
pipecolic acid; enecarbamate; electrophilic addition; fluorine; stereoselectivity; fluoropipecolate; conformational analysis; PROTEIN DESIGN; AMINO-ACIDS; 3-FLUOROPIPERIDINES; SELECTFLUOR; STABILITY; BOND; TOOL; BOC;
D O I
10.1055/s-0032-1316770
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
A short sequence to methyl cis- and trans-5-fluoro pipecolate is described via electrophilic fluorination of a pipecolate-based endocyclic enecarbamate by using Selectfluor (R) as a fluorinating agent. Methyl 5,5-difluoro pipecolate was also obtained by difluorodeoxygenation of the corresponding ketone, which was obtained in two steps from the same enecarbamate. The conformational profile of both methyl 5-fluoropipecolate isomers was investigated by NMR spectroscopy in solution and X-ray crystallography of the corresponding piperidinium picrates.
引用
收藏
页码:2421 / 2425
页数:5
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