Enantioselective Synthesis of L- and D-Carboranylalanine.
In: The Journal of organic chemistry, Jg. 61 (1996-07-12), Heft 14, S. 4582-4588
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Zugriff:
The enantioselective synthesis of L- and D-carboranylalanine is reported. Imides 13 and 14 are treated with titanium tetrachloride, DIEA, and NBS to introduce a bromo functionality in 98:2 ratio at the alpha-center. Azide displacement with TMGA, displacement of the oxazolidinone template with titanium tetrabenzyloxide, and subsequent hydrogenolysis permits L- or D-carboranylalanine to be isolated in high stereoselectivity and 35-40% yields overall.
Titel: |
Enantioselective Synthesis of L- and D-Carboranylalanine.
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Autor/in / Beteiligte Person: | Radel, PA ; Kahl, SB |
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Zeitschrift: | The Journal of organic chemistry, Jg. 61 (1996-07-12), Heft 14, S. 4582-4588 |
Veröffentlichung: | Columbus Oh : American Chemical Society ; <i>Original Publication</i>: Easton, Pa. [etc.], 1996 |
Medientyp: | academicJournal |
ISSN: | 1520-6904 (electronic) |
DOI: | 10.1021/jo952271b |
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