30515-28-7Relevant articles and documents
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Smith,J.R.L. et al.
, p. 1381 - 1383 (1978)
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Illiberis ulmivora Graeser sex attractant and preparation method thereof
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, (2021/07/01)
The invention provides an Illiberis ulmivora Graeser sex attractant, which comprises cis-7-dodecenoic acid-2-butyl ester and cis-9-tetradecenoic acid-2-butyl ester. The invention also provides a preparation method of the Illiberis ulmivora Graeser sex attractant, which comprises the steps of reducing pimelic acid and azelaic acid into 7-hydroxyheptanoic acid through lithium aluminum hydride, brominating the 7-hydroxyheptanoic acid, performing acylating chlorination on the 7-hydroxyheptanoic acid and thionyl chloride, esterifying the 7-hydroxyheptanoic acid and the thionyl chloride with sec-butyl alcohol to form 7-bromoheptanoic acid-2-butanol ester and 9-bromononanoic acid-2-butanol ester, preparing corresponding phosphine salt from the 7-bromoheptanoic acid-2-butanol ester and the 9-bromononanoic acid-2-butanol ester and triphenylphosphine, and then carrying out wittig reaction with n-valeraldehyde to synthesize a target compound. According to the Illiberis ulmivora Graeser sex attractant and the preparation method thereof, raw materials are easy to obtain, operation is easy and convenient, the cost is low, the product yield is high, the technological process is short, synthesis reaction conditions are mild, no danger exists, the product is easy to separate, for the stereoisomerization problem, unstable phosphorus ylide reacts with fatty aldehyde, the product is mainly cis-olefin, the yield is 90% or above, the stable phosphorus ylide reacts with fatty aldehyde, and the product is mainly trans-olefin.
Total Syntheses of (R)-Strongylodiols C and D
Liu, Feipeng,Zhong, Jiangchun,Li, Shuoning,Li, Minyan,Wu, Lin,Wang, Qian,Mao, Jianyou,Liu, Shikuo,Zheng, Bing,Wang, Min,Bian, Qinghua
, p. 244 - 247 (2016/02/05)
The first total syntheses of two marine natural products, (R)-strongylodiols C and D, with 99% ee were achieved. The key steps of the strategy include the zipper reaction of an alkyne, the asymmetric alkynylation of an unsaturated aliphatic aldehyde catalyzed with Trost's ProPhenol ligand, and the Cadiot-Chodkiewicz cross-coupling reaction of a chiral propargylic alcohol with a bromoalkyne.
