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Synthesis 2006(17): 2815-2817
DOI: 10.1055/s-2006-942520
DOI: 10.1055/s-2006-942520
SHORTPAPER
© Georg Thieme Verlag Stuttgart · New York
A Straightforward Access to Mono- and Bis(pyrrolo)tetrathiafulvalenes
Weitere Informationen
Received
20 April 2006
Publikationsdatum:
25. Juli 2006 (online)
Publikationsverlauf
Publikationsdatum:
25. Juli 2006 (online)
Abstract
An alternative efficient synthetic procedure to mono- and bis(pyrrolo)tetrathiafulvalenes is proposed starting from 4,4-diethoxybut-2-ynal.
Key words
acetals - ring closure - pyrroles - tetrathiafulvalene - 4,4-diethoxybut-2-ynal
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References
Compound 2 is commercially available from Acros Organics.
11Attempts to purify imine 4 by silica gel or alumina chromatography invariably led to a partial reverse reaction to the starting products.
12Alternatively, compound 5 may be directly engaged in the following step without being chromatographed (no noticeable loss in the yield of 6). In fact, the purification of 5 by silica gel chromatography is accompanied by formation of compound 6.
13We observed lower yields with longer times.