Regioselective Thorpe―Ziegler Cyclization of 3-O-Alkylated Thiophenes; Access to Aminothieno[3,2-b]furans and Aminothieno[3,4-b]furans
In: Synthesis (Stuttgart), 2012, Heft 18, S. 2964-2968
academicJournal
- print, 24 ref
Zugriff:
A two-step synthesis of polyfunctionalized aminothieno[3,2-b]furans and aminothieno[3,4-b]furans is described and discussed. It was found that O-alkylated thiophenes bearing electron-withdrawing groups in the ortho-position undergo condensation in the presence of an excess of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU). Furthermore, selective condensation on an ortho-nitrile substituent in preference to ortho-ester or ortho-ketone substituents was observed.
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Regioselective Thorpe―Ziegler Cyclization of 3-O-Alkylated Thiophenes; Access to Aminothieno[3,2-b]furans and Aminothieno[3,4-b]furans
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Autor/in / Beteiligte Person: | GADAIS, Charlène ; HESSE, Stephanie ; KIRSCH, Gilbert |
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Zeitschrift: | Synthesis (Stuttgart), 2012, Heft 18, S. 2964-2968 |
Veröffentlichung: | Stuttgart: Thieme, 2012 |
Medientyp: | academicJournal |
Umfang: | print, 24 ref |
ISSN: | 0039-7881 (print) |
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