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Synthesis 2007(7): 1103-1106
DOI: 10.1055/s-2007-965945
DOI: 10.1055/s-2007-965945
PAPER
© Georg Thieme Verlag Stuttgart · New York
Synthesis of Model Chromophores Related to the Gold Fluorescent Protein (GdFP)
Further Information
Received
19 January 2007
Publication Date:
20 February 2007 (online)
Publication History
Publication Date:
20 February 2007 (online)
Abstract
The two model chromophores 2 and 3 for the core 1 of the gold fluorescent protein (GdFP) were synthesized from commercially available 2-methyl-3-nitroaniline (4) in six synthetic steps and overall yields of 13% and 8%, respectively. The key step of the sequence is the chemoselective, reductive introduction of the amino group after assembly of the Z-configured 5-(indol-3-ylmethylene)imidazolin-4-one skeleton of the chromophore. Compound (Z)-2 was shown to undergo a light-initiated E/Z-isomerization, which allows access also to its E-isomer.
Key words
aldol reactions - bioorganic chemistry - heterocycles - indoles - photochemistry
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