Bulletin of the Chemical Society of Japan p. 3094 - 3099 (1994)
Update date:2022-08-04
Topics:
Niwa
Kunitani
Nagoya
Yamada
Described is a short-step synthesis of optically active yamataimine, a 12-membered pyrrolizidine alkaloid of retronecine type. Methyl (1S,5R)-5-methyl-2-oxocyclopentanecarboxylate derived from (R)-(+)-pulegone was converted into the necic acid component required for the synthesis of yamataimine, in a nine-step sequence. Regioselective coupling of (+)-retronecine with the necic acid component via tin-mediated regioselective acylation followed by macrolactonization led to the first synthesis of (+)-yamataimine.
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