Total Synthesis of the Gastroprotective Substance Ai-77-B and of Analogs

The Diels-Alder adducts 8 of furan to 1-cyanovinyl acetate were converted into (methyl 3-chloro-5-043-chlorobenzoyl)-2,3-dideoxy-alpha-DL-arabino-hexofuranosid )uronic acid ((+/-)-18a) and into (methyl 3-azido-5-0-(3-chlorobenzoyl)-2,3-dideoxy-alpha-DL-ribo-hexofuranosid)ur onic acid ((+/-)-41a). These compounds were condensed to (3S)-3-[(1'S)-1'-amino-3'-methylbutyl]-3,4-dihydro-8-hydroxyisocoumarin hydrochloride ((-)-2); the resulting mixtures of diastereoisomeric amides were transformed and separated to give the gastroprotective substance AI-77-B ((-)-1) and analogues.


Published in:
Helvetica Chimica Acta, 76, 1, 222-240
Year:
1993
ISSN:
0018-019X
Keywords:
Note:
Univ lausanne,chim sect,rue barre 2,ch-1005 lausanne,switzerland.
Laboratories:




 Record created 2005-11-09, last modified 2018-01-27


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