期刊
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
卷 2014, 期 11, 页码 2357-2364出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.201301903
关键词
Asymmetric synthesis; Natural products; Chiral pool; Alkaloids; Amino acids
资金
- National Graduate School of Organic Chemistry and Chemical Biology
- Aalto University
(S)- and (R)-Harmicine were synthesized from L- and D-proline, respectively. This chiral pool synthesis constitutes a new approach towards C1 substituted tetrahydro--carbolines. The developed route makes use of the 9-phenyl-9-fluorenyl protecting group strategy of amino acids to prevent racemization of the vulnerable -amino carbonyl stereocenter. Enantiopure harmicine (> 99%ee) was obtained in nine steps from commercially available starting material. The synthesis was performed without the use of any silica gel flash chromatography.
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