Yvonne G. Whittle

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1.08, CHCl3). To a suspension of CuBr (13 mg, 0.1 mmol) in ether (1 mL) at 0 "C was added allylmagnesium bromide (2.2 mL, 0.48 mmol), followed by the above-obtained tosyl-triflate 15 in ether (3 mL), and the reaction mixture was stirred at the same temperature for 3.5 h. Then n-Bu2CuLi (1.4 mmol) in ether (3 mL) was introduced and the mixture was stirred at(More)
(+)-Vomifoliol was shown to be as rapidly acting as (±) abscissic acid in stomatal closure time studies which involved the use of Eichhornia crassipes (Mart) Solms epidermal strips. (±)-Vomifoliol was shown to be less effective, while 4-(1-hydroxy-4-keto-2,6,6-trimethyl-2-cyclohexen-1-yl)-3-buten-2-one) had only a slight effect in the same bioassay system.(More)
The six step from 3-hydroxyanthranilic acid to the epoxyquinol LL-C10037a, 1, produced by Streptomyces LL-C10037 have been determined by whole-cell feedings with deuterated substrates and by cell-free studies. 3-Hydroxyanthranilic acid, 2, is decarboxylated to 2-hydroxyaniline, 11, and then oxidized to 2,5-dihydroxyaniline, 8. Acetylation at nitrogen and(More)
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