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Synthesis 2017; 49(04): 770-774
DOI: 10.1055/s-0036-1588324
DOI: 10.1055/s-0036-1588324
paper
4,5-Disubstituted 1-Methylimidazoles via Cyclization of Defined α-Aminoketones: Synthesis of Fungerin and Analogues I
Weitere Informationen
Publikationsverlauf
Received: 20. Juli 2016
Accepted after revision: 06. September 2016
Publikationsdatum:
23. September 2016 (online)
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Abstract
A protocol for the chemoselective synthesis of the fungal metabolite fungerin has been developed. First the required N-methyl α-aminoketone was generated starting from sarcosine, propiolic acid, and prenyl bromide. Marckwald thioimidazole cyclization and subsequent sulfur removal delivered the target fungerin as well as an analogue, respectively, displaying defined substitution patterns.
Key words
imidazole - α-aminoketone - Marckwald synthesis - regioselective synthesis - natural productSupporting Information
- Supporting information for this article is available online at http://dx.doi.org/10.1055/s-0036-1588324.
- Supporting Information
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For selected examples, see:
For selected examples, see:
Sarcosine methyl ester hydrochloride:
N-Boc sarcosine methyl ester:
For glycine ester enolate alkylations, see:
Synthesis of N-Boc N-methylphenylalanine Weinreb amide:
3-Iodoacrylic acid:
For ester and ortho ester, see: