Synthesis of 6-vinyl and 5-vinylproline analogues of ascomycin |
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Authors: | Murty ARC Bulusu Peter Waldstätten Thomas Tricotet Christophe Rochais Andrea Steck Markus Bacher |
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Institution: | Novartis Institute for BioMedical Research, Brunnerstrasse 59, A-1235 Vienna, Austria |
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Abstract: | 6-Vinyl (12) and (5R)- and (5S)-vinylproline (18, 19) analogues of ascomycin are synthesised starting from the known suitably protected (6S)-methoxy-9-hydroxy derivative (4) of ascomycin. The strategy involves hydrolytic cleavage of the Cε-N bond of the pipecolic acid moiety, extension of the amino acid side chain by two or one carbon units, functional group manipulations, Pd-catalysed reinstallation of the Cε-N or Cδ-N bonds, followed by deprotection and oxidation. |
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Keywords: | Phototransformation Macrolactam 5-Vinylproline 6-Vinyl ascomycin |
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