- ATTRACTION OF FEMALE MEDITERRANEAN FRUIT FLIES TO THE FIVE MAJOR COMPONENTS OF MALE-PRODUCED PHEROMONE IN A LABORATORY FLIGHT TUNNEL
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Attraction and pheromonal activity of five major identified components of the male-produced sex pheromone of the Mediterranean fruit fly Ceratitis capitata to virgin laboratory-reared females was assessed in a laboratory flight tunnel. Dual-choice competi
- Jang, E. B.,Light, D. M.,Binder, R. G.,Flath, R. A.,Carvalho, L. A.
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- Synthesis and properties of a stable, cationic, rhodium Lewis-acid catalyst for hydrosilation, Mukaiyama aldol and cyclopropanation reactions
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The remarkably stable cationic, three-coordinate, 14-electron rhodium complex 1 has been synthesized, isolated and used as a catalyst for hydrosilation, Mukaiyama aldol and cyclopropanation reactions.
- Dias,Brookhart,White
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p. 423 - 424
(2007/10/03)
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- Improvement on the synthesis of (E)-alk-3-enoic acids
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(E)-Alk-3-enoic acids have been prepared in high yield (85-90%) and excellent stereoselectivity (98-99%) by a modified Knoevenagel condensation of a straight carbon chain aldehyde with malonic acid, in dimethyl sulfoxide (DMSO) or dimethylformamide (DMF) at 100°C, in the presence of piperidinium acetate as catalyst. Condensation of the aldehyde with a monoester of malonic acid, under the above conditions, gave the corresponding ester of (E)-alk-3-enoic acid in high yield (76-82%) and good stereoselectivity (90-92%). Condensation of the aldehyde with cyanoacetic acid gave the β,γ-unsaturated nitrile in moderate yield (35-40%) without stereoselectivity.
- Ragoussis, Nikitas,Ragoussis, Valentine
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p. 3529 - 3533
(2007/10/03)
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- Base-Induced α-Alkenylation of Ethyl Bromoacetate, Phenacyl Bromide, and Chloroacetonitrile via B-trans -1-Alkenyl-9-borabicyclononanes
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B-trans-1-Alkenyl-9-borabicyclononanes, easily and quantitatively prepared by the reaction of 9-BBN with various 1-alkynes in tetrahydrofuran, undergo facile reaction with α-halo carbanions generated from ethyl bromoacetate, phenacyl bromide, and c
- Brown, Herbert C.,Bhat, Narayan G.,Campbell, James B.
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p. 3398 - 3400
(2007/10/02)
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- INFLUENCE OF HETEROAROMATIC AMINES TO KNOEVENANGEL CONDENSATION
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In the Knoevenagel condensation of hexanal and malonic acid, the ratio of α,β-and β,γ-unsaturated acids was remarkably affected by the nature of tertiary amines used as a catalyst.That is, the condensation in pyridine or isoquinoline gave 2-octenoic acid selectively, whereas the condensation in 2-methylpyridine, 2,6-dimethylpyridine, or quinoline gave 3-octenoic acid as the main product.
- Yamanaka, Hiroshi,Yokoyama, Masaaki,Sakamoto, Takao,Shiraishi, Takayuki,Sagi, Mataichi,Mizugaki, Michinao
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p. 1541 - 1544
(2007/10/02)
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- PALLADIUM-CATALYZED DECARBOXYLATION-CARBONYLATION OF ALLYLIC CARBONATES TO GIVE β,Γ-UNSATURATED ESTERS UNDER MILD CONDITIONS
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Allylic carbonates undergo facile palladium-catalyzed decarboxylation-carbonylation under mild conditions to give β,γ-unsaturated esters in high yields using palladium-phosphine complex as a catalyst.
- Tsuji, Jiro,Sato, Koji,Okumoto, Hiroshi
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p. 5189 - 5190
(2007/10/02)
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