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Cyclopropanecarboxylic acid or 2,2-dimethyl cyclopropanecarboxylic acid was used as a leading compound for its biological activity. Six new N-(substituted) cyclopropanecarboxyl-N′-pyridin-2-yl thioureas were prepared. Compound 5 was obtained by oxidizing cyclization of compound 4 in the presence of bromine in chloroform solution. The structures of 4 and 5 were confirmed by 1 H NMR and elemental...
Six eremophilane sesquiterpenes were obtained from a marine fungus Penicillium sp. BL27-2. Their structures were elucidated as 3-acetyl-9, 7 (11)-dien-7α-hydroxy-8-oxoeremophilane (1), 3-acetyl-13-deoxyphomenone (2), Sporogen-AO 1 (3), 7-hydroxypetasol (4), 8α-hydroxy-13-deo -xyphomenone (5) and 6-dehydropetasol (6) based on detailed NMR analysis. 1 was a new compound and 2 was obtained as a new natural...
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