Process for the preparation of poly-unsaturated hydrocarbons
申请人:Firmenich S.A.
公开号:US03960977A1
公开(公告)日:1976-06-01
Process for the preparation of poly-unsaturated hydrocarbons, in particular undeca-1,3,5-triene, which comprises reacting a quaternary phosphonium salt with hexanal. The product obtained in accordance with the process of the invention is a useful perfuming ingredient.
Stereoselective synthesis of -disubstituted olefins via 2,3-sigmatropic rearrangements. An approach to leukotrienes.
作者:Aston D Kaye、Gerald Pattenden、Stanley M Roberts
DOI:10.1016/s0040-4039(00)84441-x
日期:1986.1
Stereoselective 2,3-sigmatropic rearrangement of the propargyl 2-silylallyl ether(5) leads to the vinyl silane (7), which, after protiodesilylation and palladium catalysed coupling to 3-bromoprop-2-enol, produces the ,-dienynol (10) a key intermediate in leukotriene synthesis.
SEQUENTIAL [2,3]WITTIG AND CLAISEN REARRANGEMENT: A FACILE SYNTHETIC METHOD FOR (<i>E</i>,<i>E</i>)-4,7-ALKADIENALS AND -ALKADIENOIC ACIDS. A NEW FORMAL SYNTHESIS OF (±)-CERULENIN
作者:Koichi Mikami、Naoyuki Kishi、Takeshi Nakai
DOI:10.1246/cl.1981.1721
日期:1981.12.5
The regioselective [2,3]Wittig rearrangement of bis-allylic ethers followed by the Claisen rearragement permits ready access to (E,E)-4,7-alkadienals and -alkadienoic acids. The versatility of the sigmatropic sequence is demonstrated within the context of a new formal synthesis of (±)-cerulenin possessing an interesting spectrum of biological activities.
Influence of the Chemical Structure on Odor Qualities and Odor Thresholds in Homologous Series of Alka-1,5-dien-3-ones, Alk-1-en-3-ones, Alka-1,5-dien-3-ols, and Alk-1-en-3-ols
作者:Katja Lorber、Peter Schieberle、Andrea Buettner
DOI:10.1021/jf404885j
日期:2014.2.5
Odor qualities and odor thresholds in air in homologous series of synthesized alk-1-en-3-ols and alka-1,5-dien-3-ols and their corresponding ketones were evaluated by gas chromatography-olfactometry. In the series of the alk-1-en-3-ols and alk-1-en-3-ones the odor quality changed successively from pungent for the compounds with five carbon atoms via metallic, vegetable-like for the six- and seven-carbon odorants to mushroom-like for the compounds with eight and nine carbon atoms. With further increase in chain length the mushroom-like impression decreased and changed to citrus-like, soapy, or herb-like. In both series, two odor threshold minima were found for the six-carbon and also for the eight- and nine-carbon odorants, respectively. In contrast to this, the odor qualities in the series of the (Z)- and (E)-alka-1,5-dien-3-ols and their corresponding ketones did not change significantly with geranium-like, metallic odors and an increasing mushroom-like odor note with increasing chain length. The lowest thresholds were found for the eight- and nine-carbon (Z)-compounds, respectively.
Servi, Sueleyman; Ahmedzade, Misir; Coskun, Mehmet, South African Journal of Chemistry, 2000, vol. 53, # 2, p. 73 - 76
作者:Servi, Sueleyman、Ahmedzade, Misir、Coskun, Mehmet、Cansiz, Ahmet